Benign Prostatic Hyperplasia – Prostate Cancer – Prostatitis

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Medical Treatment of the Prostate Gland. Part 9

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Tuberculosis of the Prostate Gland

Etiology and Incidence. Tuberculosis of the prostate is a disease of the young adult and, as a rule, is observed in those in the third and fourth decades of life. It is almost always a secondary involvement in a progressive tuberculosis which is extending throughout the urogenital system. In most instances it is probably an extension from the seminal vesicles. Between 50 and 70 per cent of all cases of tuberculosis of the male genital tract show involvement of the prostate.

Pathology. At first the prostatic lesion may be confined to the region about the ejaculatory duct on the side corresponding to the infected vesicle, whence it spreads, by way of the acini or the lymphatics, to other parts of the gland. In the rare cases in which the prostate is infected by tubercle bacilli conveyed in the urine, the initial lesion is periurethral.

The first pathological change is the formation of tubercles. The tubercle bacilli are apparently first deposited in the walls of the small capillaries. Other tubercles develop from these original foci and extend in the usual manner. Later stages are fibrosis, caseation, and suppuration. Suppuration may result in rupture of an abscess through the prostatic capsule, with the formation of an intractable perineal fistula; or there may be rupture into the urethra. Spontaneous healing is rare. Small caseous areas may become encapsulated and latent, or they may undergo calcification and encapsulation.

Symptoms and Diagnosis. With well-walled-off tubercles, there may be no untoward symptoms whatsoever. If the tubercles have coalesced and finally ruptured into the urethra, there will be frequency, dysuria, hematuria, and pyuria.

Rectal examination reveals a nodular, elastic gland, usually affected on one side only, and differing from a carcinomatous condition in that it lacks the board-like consistency usually associated with the latter. The secretion may show tubercle bacilli. Differential diagnosis is based chiefly on microscopic study of a specimen of diseased tissue.

Treatment. The hygienic, dietary, and therapeutic measures advocated for postoperative and inoperable tuberculosis of the urogenital tract are usually prescribed, and good results have been obtained by us therefrom in some cases. When calcium deposits are present, total prostatectomy is indicated. On the other hand, in acute and subacute tuberculosis of the prostate, operation is distinctly contraindicated. Even in the presence of abscess, it is preferable to allow it to absorb or rupture into the urethra rather than to evacuate it through the perineum, as this is likely to result in a persistent fistula. Radical removal of the genital tract is inadvisable in patients with extensive involvement of the prostate gland.

Cysts of the Prostate Gland

Cysts of the prostate gland are decidedly rare. They may be either congenital or acquired. The most common is the simple retention cyst, which may arise in any portion of the gland and is merely a normal acinus the duct of which has become occluded, causing expansion of the acinus.

Treatment. Smaller retention cysts, producing no symptoms, are best left alone. When treatment is necessary, destruction of the cyst by fulguration, or removal by prostatic resection instruments, is the treatment of choice.

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Medical Treatment of the Prostate Gland. Part 8

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Syphilis of the Prostate Gland

Syphilis of the prostate appears to be exceedingly rare. We have personally never encountered a case, and very few have been reported in the literature.

Symptoms and Diagnosis. There is nothing pathognomonic either in the symptoms or the rectal findings. The chief symptom is perineal pain, usually aggravated by urination. Less common are hematuria, pain on defecation or coitus, urinary disturbances, and retention. Prostatic massage usually produces a more or less characteristic discharge. On rectal palpation the prostate will be found markedly irregular, enlarged, and sometimes nodular. The Wassermann test is usually positive.

Prostatic syphilis is a late manifestation of lues, and occurs, usually, between the ages of 40 and 65 years, when it may be very difficult to differentiate it from hypertrophy of the prostate and carcinoma.

Prognosis and Treatment. If diagnosed early, the disease responds readily to antiluetic treatment; if unrecognized, the prostate may be destroyed by gummas.

Treatment consists of the usual antiluetic measures, reinforced by surgical drainage of necrotic gummas.

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Medical Treatment of the Prostate Gland. Part 7

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Diseases of the Prostate Gland

Prostatic Abscess

Etiology. Abscess of the prostate gland may follow failure of an acute diffuse parenchymatous prostatitis to subside or to become chronic. Multiple small abscesses in the stroma coalesce to form one large abscess. A frequent cause is the gonococcus, but our own studies have shown that many other organisms may be present in abscess cavities in the prostate. Prostatic abscess may result from improper instrumentation; or occur as a complication of systemic infection; or be secondary to superficial pyogenic infections, such as carbuncles, boils, and felons. In the last event, the causative organism is the Staphylococcus aureus.

Symptoms and Diagnosis. The symptoms are pain in the perineum, chills, fever, and frequent and painful urination which may progress to complete retention. Leukocytosis is present. Chronic abscess may persist for weeks without producing local symptoms. There are occasional cases of huge prostatic abscesses in which the only symptom is difficulty of urination; this is due to the type and lack of toxicity of the infecting organism.

The diagnosis usually is not difficult. By rectum, the prostate is felt to be enlarged, hot, tender, and often asymmetrical. The presence of fluctuation is conclusive. If no fluctuation is detected, a needle may be inserted into the suspected area and pus withdrawn, if present. If neither fluctuation nor pus is noted, a cystourethrogram may be helpful.

Prognosis and Treatment. An untreated prostatic abscess may rupture into the urethra or rectum, or burrow into the perineum, bladder, or even the peritoneum, with dire results. Abscesses which empty their entire contents into the urethra are likely to be of the follicular type, or at least not deeply seated in the parenchyma. Spontaneous evacuation through the rectal wall is a surgical calamity.

If proper drainage is instituted, convalescence is usually satisfactory, although every case must be followed by a period of observation and treatment to insure a normal gland.

Evacuation of a prostatic abscess through the posterior urethra is the method of choice. A perineal section is done, the finger introduced into the prostatic urethra, and the honey-combed interior cleaned out so that no pockets remain. A tube is then introduced into the bladder, diverting the urine and conducting the pus out through the perineal wound.

Evacuation may also be accomplished from outside the urethra. The posterior surface of the prostate is exposed as in a Young perineal prostatectomy, the abscess incised, and a tube inserted into it and fixed in position. The transvesical route is occasionally employed, but our own experience with it has not been encouraging.

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Medical Treatment of the Prostate Gland. Part 6

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Diseases of the Prostate Gland

Prostatitis

2. Chronic Prostatitis

Chemotherapy has given a new hope in the treatment of chronic prostatitis, with the introduction of the sulf onamides and mandelic acid. Other useful drugs are salol and methenamine used with acid sodium phosphate. When prostatic pain is very severe, sedatives are often necessary. The barbiturates usually suffice, but occasionally it is necessary to give codeine, pantopon, or morphine. When there is pain in the region of the prostate, or during micturition, the patient should be given a soothing prescription, such as Kirwin’s mixture:

Potassium citrate Drams VI (24 cc.)
Tinct. Hyoscyami Ounces I (30 cc.)
Tinct. Opii camphorata Ounces I (30 cc.)
Elix. Saw palmetto et Santalwood q.s. ad. Ounces IV (120 cc.)

Sig: — Drams II (8 cc.) q. 4 hours

Spices and alcohol should be eliminated from the diet and constipation avoided. When there is marked vesical irritation, a restricted diet should be used, which limits meat, tea and coffee, and eliminates certain foods which are irritating to the bladder, such as asparagus, carrots, tomatoes, berries.

The application of heat to the inflamed prostate has definite therapeutic value. Relief may often be obtained by hot sitz baths, hot rectal irrigations, diathermy, or radiothermy. The Elliott treatment regulator, introduced through the rectum, is an effective method of applying dry heat directly to the prostate and adjacent structures.

Occasionally a prostate becomes so infected that no amount of treatment by these methods will effect a cure. Total prostatectomy is then indicated.

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Medical Treatment of the Prostate Gland. Part 5

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Diseases of the Prostate Gland

Prostatitis

2. Chronic Prostatitis

To secure uncontaminated prostatic secretion the patient is first asked to void his urine; the penis and meatus are cleansed with green soap and water; and the anterior urethra irrigated with rivanol dextrose, acriflavine, or other antiseptic solution. The patient kneels on the table and a small endoscopic tube is inserted to a point beyond the external sphincter into the prostatic urethra. He then bends over and rests on his hands or elbows. The prostate is massaged firmly but gently and finally the prostatic urethra emptied by vigorous strokes down the middle depression of the prostate. The uncontaminated prostatic fluid is received in a sterile test-tube which the assistant holds at the end of the endoscope.

Normal prostatic fluid is opalescent and viscid, and microscopically is seen to consist of corpora amylacea, lecithin globules, columnar epithelia, and occasional hyaline globules. In chronic prostatitis, the prostatic secretion is less opalescent than the normal fluid, and the normal elements are replaced by pus cells and degenerated epithelial cells. The degree of infection is measured by the amount of pus in relation to the lecithin. In well-developed chronic prostatitis much of the lecithin content will be replaced by pus cells, often in clumps. As the condition improves, the pus cells diminish and the normal elements reappear. Bacteria may be present in great numbers.

Urethroscopic examination of the posterior urethra is advisable in cases where palpation of the prostate and vesicles, analysis of the voided urine, and microscopic examination of the secretions have proved inconclusive. The marked chronic inflammatory changes that may be revealed by such examination not infrequently are the only clue to a low-grade prostatitis and vesiculitis.

Prognosis. The patient suffering from long-standing prostatitis is not easily cured and it is advisable so to inform him at the outset of treatment. Relief of symptoms by some form of therapy, especially urethral dilatation, massage, rectal heat, and chemotherapy, is possible in most cases; but reversion to a normal prostatic fluid is more difficult to obtain and requires complete removal of infectious foci and restitution of prostatic drainage.

Treatment. In general, treatment consists of dilatation of the prostatic urethra, prostatic massage, urethrovesical irrigations and instillations, heat applied in the form of hot rectal irrigations, hot sitz baths, or diathermy, chemotherapy, and hyperpyrexia and vaccine therapy in selected cases.

The elimination of distant foci of infection, in the tonsils, teeth, sinuses, or colon, is of the greatest importance. In these cases, local measures are useful in relieving the symptoms, but are of little value in cure of the prostatitis, which is dependent upon removal of the primary focus.

The main problem in the treatment of chronic prostatitis is the restitution of free drainage, since retention favors infection. The most effective method of restoring the potency of prostatic and ejaculatory ducts is by a gradual, gentle, but thorough dilatation of the prostatic urethra to its maximal capacity. Urethral dilatation should precede massage of the partially or totally retentive gland since massage is beneficial only when drainage can take place through patent ducts. Active instrumentation is permissible in most cases at the time of the first consultation, the only clinical requirement being a clear first glass of urine. Dilatation is best carried out by means of sounds (passed upon a bladder partly filled with a mild antiseptic solution). Dilatation is carried on two or three times a week until the largest possible sound has been passed on at least three occasions and has remained tight, indicating that the maximal capacity of the urethra has been reached. The voided urine should be examined before each instrumentation, and treatment discontinued whenever the urine becomes cloudy. A mild urethritis may develop when the occluded ducts resume drainage and empty their infectious contents into the urethra. It may then be necessary to employ urinary antiseptics: sulfanilamide, mandelic acid, salol, or methenamine with acid sodium phosphate — their selection depending upon the nature of the infecting organism. Clinical proof of improved drainage can be obtained by a comparison of the amount and composition of the secretion before and after dilatation.

When satisfactory drainage of the diseased prostate has been restored, digital massage may be given once or twice a week upon a bladder partly filled with antiseptic solution. The aims of prostatic massage are: (1) the gentle expression of the accumulated secretion, (2) a stimulation of the contraction of smooth muscle fibers, and (3) the stretching and final removal of marginal adhesions. The technique, as well as the results obtained, vary widely with different operators. The patient may stand with the body bent forward, as over the back of a chair, or be placed in the Sims’ position, or he may rest upon his knees and elbows. The operator, with his gloved index finger in the rectum, exerts gentle pressure upon the lobes palpable from that position, using a downward stroking motion with the force directed toward the urethra, the object being to empty the prostatic acini of their purulent contents and to break up adhesions about the gland. Secretions later may be expressed from the ejaculatory ducts and the sinus pocularis by bringing the firmly pressing finger downward along the posterior urethra. Most patients with chronic prostatitis are benefited by intelligent application of prostatic massage; but too early, too vigorous, too frequent, or unduly prolonged massage may cause acute epididymitis or other unfavorable reactions. The degree of pressure is a matter of experience and is governed largely by the degree of inflammation present. As a rule, massage is carried out twice a week at first — the treatments tapering off, as the condition improves, until the patient is receiving massage once a week, then every ten days, semi-monthly, and finally once a month.

Hyperpyrexia and vaccines, serums, and injections of foreign proteins have a limited usefulness. Hyperpyrexia has been found highly beneficial in certain severe cases of gonorrhea and in the treatment of most gonococcal complications, but it is expensive, very uncomfortable, and attended with considerable risk. We have found vaccines very helpful in certain cases of arthritis where the infective focus was in the prostate, but in other cases their use has resulted in no appreciable benefit. Intraprostatic injections of antiseptic solutions have been recommended for recalcitrant pyogenic prostatitis; our experience has been that the benefits are not sufficient to offset the hazards of this method.

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Medical Treatment of the Prostate Gland. Part 4

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Diseases of the Prostate Gland

Prostatitis

2. Chronic Prostatitis

Symptoms. The signs and symptoms of chronic prostatitis vary greatly. The most frequent complaints are of pain, a urethral discharge, which may be profuse or merely the so-called “morning drop,” and some disturbance of sexual function, always accompanied by neurasthenia. The pain may be local or referred. Ordinarily, it is located in the perineum, and may be described by the patient simply as a “heaviness” in the rectum. With this type there is generally a history of the passage of prostatic fluid on defecation. The pain may be referred down the back or inner sides of the legs, or into the groins, penis, or sacrum; or it may simulate that produced by renal or ureteral stone. Frequent and painful urination, urgency, and difficulty are all common complaints, and result largely from involvement of the posterior urethra and bladder neck. If abscess occurs in the course of a chronic prostatitis, which is not uncommon with pyogenic infections, there is increased leukocytosis and pain, chills, and a rise in temperature.

Frequently the predominant symptoms are metastatic, with absence of local symptoms, so that the prostate is not suspected.

Diagnosis. The diagnosis of chronic prostatitis should be based on (1) rectal palpation, (2) repeated analyses of the voided urine, (3) microscopic examination of the prostatic secretion and ejaculate, and (4) urethroscopic examination of the posterior urethra and vesical neck. It is often wise to delay this last procedure until the most distressing symptoms have been allayed by treatment.

Rectal palpation, though of the greatest importance, is not of itself sufficient to establish the diagnosis of chronic prostatitis since, not infrequently, palpation of the chronically inflamed gland may reveal no gross changes, yet pus cells will be found in the prostatic strippings. Many a prostate that feels normal functions poorly and contains large amounts of pus and debris, and many microorganisms.

Often, however, careful rectal palpation will reveal changes in and about the gland. It will be hard and nodulated, and usually adhesions can be felt extending from its lateral borders to the seminal vesicles and adjacent pelvic tissues. Such a prostate is ordinarily, but not always, enlarged, and sometimes there are boggy spots between the areas of induration. Areas of normal gland are usually present.

Microscopic examination of the prostatic fluid, expressed by massage, is the only reliable method of demonstrating the presence of infection in the gland. Often the diagnosis must rest solely on microscopic evidence of pus in the expressed secretions. In treating a case of chronic prostatitis, frequent microscopic examinations of the unstained prostatic fluid should be made, as the conditions present in the gland can be ascertained in this way much more accurately than by palpation. Negative findings on one examination of prostatic secretion are, however, insufficient proof of the absence of prostatitis, since pus in some instances does not make its appearance until after the prostate has been massaged from two to five times. The secretion expressed from the first massage may be from normal portions of the gland, and two or more manipulations may be necessary to open a pathway into the urethra from a closed-off focus of infection. Massage for diagnostic purposes must, of course, be carried out firmly enough to express the secretions, but very gently and cautiously; otherwise, epididymitis may result. The prostatic fluid should be stained at least once to ascertain the presence or absence of bacteria, and their type. Bacteria are more readily identified on smear than in culture, but many of the more chronic cases fail to show bacteria either on smear or in culture.

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Medical Treatment of the Prostate Gland. Part 3

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Diseases of the Prostate Gland

Prostatitis

2. Chronic Prostatitis

Chronic inflammation of the prostate gland is a very common condition in adult males. In our series of 350 postmortem studies, a large number of the specimens showed evidence of inflammation of the prostate.

The chronically infected prostate is a common focus of infection, and urologists have repeatedly emphasized the importance of examining the gland and its secretion when searching for the source of obscure infectious conditions. We regard the prostate as second only to infected tonsils as a cause of arthritis. It may also be responsible for endocarditis, neuritis, iritis, and myositis.

Etiology and Bacteriology. Chronic prostatitis may result from any cause which congests the gland, such as long-standing infection, sexual abuse, or instrumental or other trauma. Other possible etiological factors are prostatic calculosis, stricture of the urethra, and certain vitamin deficiencies and endocrine dyscrasias.

Chronic prostatitis is most frequently the sequel to an acute infection, which may be caused by either the gonococcus or other organisms. The incidence of acute prostatitis as a complication of gonorrheal urethritis has been variously estimated at from 50 to 90 per cent; and untreated acute gonorrheal prostatitis, or incompletely treated posterior urethritis, is undoubtedly the most important factor in the production of chronic prostatitis. Only immediately after the acute inflammation has subsided is the gonococcus to be found in the prostatic strippings.

Chronic inflammations are by no means always due to the gonococcus, however. Non-specific infection is common, and may be a direct extension from the urethra; or blood-borne from a focus in the tonsils, teeth, or sinuses; or the aftermath of an acute systemic infection. The most common organisms demonstrated are the colon bacillus and the staphylococcus, streptococcus and their subforms.

Pathology. Microscopically, there are usually to be observed regions of inflammatory reaction in and about the acini, characterized by an increase of the polymorphonuclear cells, lymphocytes, and plasma cells, with marked proliferation of connective tissue. In other cases, the micro-pathological changes consist in circumscribed areas of round cell or polymorphonuclear cell infiltration. Minute abscesses are sometimes observed.

In a large percentage of cases, cystoscopic examination will show pathological changes in the region of the bladder neck, trigone, or posterior urethra. There is usually more or less involvement of the seminal vesicles, which may be soft and atrophic, or enlarged and indurated.

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Medical Treatment of the Prostate Gland. Part 2

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Diseases of the Prostate Gland

Prostatitis

Prostatitis is a very common disease. It is usually associated with inflammation of the posterior urethra, seminal vesicles, vesical neck, trigone, or even the epididymes, and should, therefore, be studied in relation to both the urinary and genital tracts.

1. Acute Prostatitis

Etiology and Bacteriology. The most frequent cause of acute prostatitis is gonococcal infection. Non-specific acute infections are also common and have of late received much study. The organisms most often responsible are the Staphylococcus albus and aureus, Streptococcus pyogenes, and colon bacillus, but the Bacillus proteus, diphtheroid types, or other organisms may be present. Mixed infections are frequent Contributing causes of prostatitis are masturbation over a protracted period, excessive sexual excitation without gratification, excessive sexual intercourse, and coitus interruptus.

Infection may reach the prostate by direct extension from the posterior urethra up the prostatic ducts (the most common way); or it may be descending, and secondary to an acute infection of the kidney or bladder; or blood-borne, from a primary focus in the sinuses, teeth, or tonsils; or a complication of a systemic infection, such as influenza. A chronic prostatitis may be exacerbated into an acute condition by unwise instrumentation and manipulation in the treatment of chronic posterior urethritis and prostatitis.

Pathology. Three types of acute prostatitis are recognized:

(1) acute catarrhal inflammation, which is always present in acute posterior urethritis and is usually caused by direct migration of the organisms up the prostatic tubules;

(2) follicular prostatitis, which follows the first type and is characterized by many small abscesses and distention of the tubules with pus, which is not evacuated because of obstruction of the ducts;

(3) parenchymatous prostatitis, an intensification of the second stage, the suppurative foci involving a greater extent of the surrounding stroma.

The termination of acute prostatitis is resolution, the formation of a large prostatic abscess, or chronic prostatitis.

Symptoms. The onset of acute prostatitis may be mild, with few or no local symptoms; or it may be very severe. When of urethral origin, the initial symptoms are usually disturbances of urination: urgency, frequency, burning, pain during urination, dribbling. The prostate may enlarge to the point of causing complete retention, requiring catheterization. In acute prostatitis of hematogenous origin, the attack may be ushered in by a chill or fever, and there may or may not be urinary symptoms. Pain may vary from a sense of fulness in the perineum or rectum to acute pain — in the perineum, rectum, loins, penis, or above the pubes. There is leukocytosis.

Diagnosis. Mild prostatitis is likely to escape observation during the course of acute gonorrhea. In severe cases, rectal palpation of a symmetrically enlarged, hot, tender gland is sufficient, with the symptoms and the findings of the two-glass urine test, to establish a diagnosis.

Treatment. Treatment of acute prostatitis is expectant, and consists in absolute rest in bed for all febrile cases; avoidance of physical strain and sexual excitation; avoidance of trauma to the gland; the application of heat in the form of hot sitz baths, hot rectal irrigations, or diathermy; sedatives and belladonna and opium suppositories for pain; alkalinization of the urine, and forced fluids if there is no urinary retention. With acute retention, catheterization may be necessary. Massage of the prostate and urethral instrumentation are contraindicated in the acute stage.

In addition to the above methods for symptomatic relief, chemotherapy has proved of great value in shortening the acute stage of prostatic infections. Sulfanilamide is a most useful drug in combating both gonococcal and non-specific infections. In bacillary infections, mandelic acid, and methenamine and sodium acid phosphate, are valuable.

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Medical Treatment of the Prostate Gland. Part 1

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The Department of Urology of the New York Hospital
(Given January 31, 1941)

Introduction

One out of every four men over the age of 70 years has some deviation from the normal as regards the anatomical structure of the prostate gland. This fact was established by the author in a series of 250 consecutive autopsies on males at Bellevue Hospital. In addition, the prostate is subject to attack by various organisms in youth and young manhood, adding to the general incidence of prostatic disease. In later years, adenomatous hypertrophy and carcinoma and other malignancies enter the picture. The prostate gland is, therefore, an organ of considerable importance from the pathological standpoint, and must be reckoned with at all ages after puberty — and, indeed, even before puberty because sarcoma of the prostate occurs at any age.

Anatomical and Physiological Considerations

The prostate gland consists of five lobes: two lateral, a middle, an anterior and a posterior. There are two accessory structures: (1) the subcervical group of tubules, occurring under the mucosa at the vesical orifice, and (2) Homes’ gland, located in the mucosa of the middle of the trigonum vesicae. The various lobes of the gland send their ducts (averaging 63 in number) to open into the posterior urethra.

In adult life, the prostate is normally about as large as an English walnut. Located at the neck of the bladder, in a particularly strategic position for causing obstruction, even slight disturbances in the prostate assume exaggerated proportions.

The only proved function of the prostate gland is the production of a chemical substance which dilutes the testicular and seminal vesicular secretions and separates and activates the spermatozoa. The formation of an internal secretion has not been proved.

Injuries to the Prostate Gland

The prostate is well protected, but may be injured by external violence with fracture of the symphysis. More common are operative injuries and internal traumatism resulting from instrumentation.

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Prostate specific antigen in urinary tract infection

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Prostate specific antigen (PSA) has a reported sensitivity for prostatic adenocarcinoma of up to 80%. However, it lacks specificity. The reported positive predicted value of an elevated PSA (Hybritech Tandem-R PSA radioimmunoassay >4 ng/ml) for prostatic carcinoma in screening studies is only 28-33%. This is largely because 21-53% of men with benign prostatic enlargement (BPE) will have an elevated prostate specific antigen above 4 ng/ml. Prostatitis, including subclinical histologically proven inflammation, may lead to an elevated PSA. The physiological variation in serum PSA levels can be up to 30%. Nevertheless, serum prostate specific antigen is a useful tool in the detection and staging of organ-confined prostate cancer and the monitoring of disease progression and response to hormonal manipulation.

We present a series of 31 men (mean age = 67 years; range = 48-82 years) who were referred to the urology unit over a 17-month period with a raised PSA, BPE on digital rectal examination, and a documented urinary tract infection (UTI). Five men were asymptomatic. The mean PSA (Hybritech Tandem-R PSA radioimmunoassay) at presentation was 24 ng/ml, with a range of 5.4-100 ng/ml (normal range = 0-4 ng/ml).

A clinically significant UTI (>105 organisms per ml) was documented in all 31 patients. Following eradication of the urinary tract infection, the prostate specific antigen returned to normal (mean = 2.7 ng/ml; range = 0.3-3.9 ng/ml) in 81% of cases (25) within 17 weeks. In the remaining six cases, the PSA fell after treatment but remained persistently elevated above the normal range (9.7 ng/ml; range = 4-14.9 ng/ml). Eleven of the symptomatic cases became asymptomatic after treatment.

The failure of the prostate specific antigen to return to normal in six cases may be due to bulky benign prostate hyperplasia or an age-related variation in PSA. However, this group requires careful urological follow-up.

An uncomplicated urinary tract infection in men with benign prostatic enlargement appears to be the cause of an elevated PSA. Following eradication of the UTI, the prostate specific antigen normalizes in the majority of cases. The half-life of PSA is between 2.2 and 3.15 days. Estimation of the serum prostate specific antigen in men with benign prostatic enlargement on digital rectal examination with a suspected or documented urinary tract infection is therefore not recommended for a period of at least six weeks after successful antibiotic treatment. This will reduce the number of patients undergoing negative prostatic biopsies — a procedure not without an associated morbidity.

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