carcinoma of the prostate


Also found in: Acronyms.

car·ci·no·ma of the pro·state

[MIM*176807]
a malignant neoplasm arising from glandular epithelial cells of the prostate gland.

Prostatic adenocarcinoma (PA) is the most commonly occurring visceral cancer in men, and it ranks second only to lung cancer as a cause of cancer deaths in men. Each year, 190,000 new cases are diagnosed in the U.S., and more than 30,000 men die of the disease. Foci of PA are found at autopsy in 40% of men dying after age 50. In the U.S. a man has a 15% lifetime risk of being diagnosed with PA but only a 3% risk of dying of it. The neoplasm is androgen dependent and does not occur in eunuchs. It is both more common and more aggressive in African-American men. PA must be differentiated diagnostically from benign prostatic hyperplasia, which is not a premalignant lesion. PA usually arises in the periphery of the gland and readily extends through the capsule into the periprostatic tissues, to seminal vesicles, and to regional lymph nodes. At the time of diagnosis, more than 40% of patients have disease that has spread beyond the gland. Bones of the axial skeleton are the usual sites of distant metastasis. The liver, lungs, and brain are other common sites. Early disease is asymptomatic; the diagnosis is most often made by screening of apparently healthy men with digital rectal examination, assay of prostate-specific antigen (PSA), or both. Advanced disease may present as urinary obstruction or bone pain due to metastasis. Men with nodular asymmetry or induration in the prostate gland on digital examination, or elevation of PSA, are evaluated by transrectal ultrasonography of the prostate with ultrasonically directed needle biopsy. Testing for osseous metastases includes measurement of serum alkaline phosphatase, radionuclide bone scan, computed tomography, and magnetic resonance imaging. PA is graded by the Gleason scoring method, which reflects the degree of histologic differentiation in the two most prominent malignant foci. Anatomic staging is based on extension of the tumor beyond the prostatic capsule, not on tumor size. A low or undetectable level of p27 protein in prostatic tissue is a marker of more aggressive malignancy. Treatment depends on the grade and stage of disease and the age and general condition of the patient. In elderly men and those with concurrent life-threatening illness, benign neglect may be the treatment of choice. Radical prostatectomy (removal of the entire gland along with the seminal vesicles) is generally reserved for patients with early or limited disease and a life expectancy of at least 10 years. This treatment is associated with a substantial risk of urinary incontinence and impotence. Radiotherapy with external beam radiation or transperineal implantation of radioactive isotopes may be employed besides or instead of surgery. Androgen blockade by orchidectomy or by administration of estrogen, an androgen antagonist, or a gonadotropin-releasing hormone is palliative in advanced disease. Some authorities oppose digital rectal examination and PSA screening of asymptomatic men with life expectancies of less than 10 years, on the grounds that the risks of false-negative results and of adverse consequences of aggressive treatment outweigh any possible benefit in survival or quality of life.

car·ci·no·ma of the pros·tate

(kahr'si-nō'mă pros'tāt)
A malignant neoplasm arising from glandular epithelial cells of the prostate gland.
References in periodicals archive ?
Intraductal carcinoma of the prostate on needle biopsy: histologic features and clinical significance.
Kulatilake, "Inappropriate secretion of antidiuretic hormone by carcinoma of the prostate," British Journal of Surgery, vol.
Arnheim, "Carcinoma of the prostate: a study of the postmortem findings in one hundred and seventy-six cases," The Journal of Urology, vol.
Unusual and underappreciated: small cell carcinoma of the prostate. Semin Oncol 2007;34:22-9.
Primary signet ring cell carcinoma of the prostate. Can Urol Assoc J 2013; 7:E768-71.
Kaalhus, "Carcinoma of the prostate with soft tissue or non-regional lymphatic metastases at the time of diagnosis: a review of 47 cases," British Journal of Urology, vol.
This edition has a new chapter on pathologic conditions of the ureter and renal pelvis; new entities; new renal cell carcinoma subtypes and intraductal carcinoma of the prostate; immunohistochemistry in the diagnosis of major genitourinary diseases and specimen handling, reporting, and staging for all major urologic malignancies; and updates to the International Society of Urological Pathology/Vancouver classification of renal tumors, the Gleason grading system for prostate cancer, and the Fuhrman grading system for renal cell carcinoma.
Small cell carcinoma of the prostate is believed to originate from epithelial cells of prostatic ducts and acini, as well as the endothelium of the prostatic urethra.
Bak et al., "Long-term follow-up of conservatively managed incidental carcinoma of the prostate: a multivariate analysis of prognostic factors," Scandinavian Journal of Urology and Nephrology, vol.
Primary squamous cell carcinoma of the prostate is a rare neoplasm of prostate gland and comprises 0.5-1% of all prostatic carcinomas [1].
General information: Measurement of the enzyme prostatic acid phosphatase (PAP) in serum is an established procedure in monitoring metastatic carcinoma of the prostate and is also useful in confirming suspected early stage disease.
Carcinoma of the prostate is the 2nd commonest cause of prostatic enlargement.

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