http://www.cap.org/apps/docs/reference/myBiopsy/ProstateAden...

Adenocarcinoma:
A type of cancerous, or
malignant, tumor that
originates in a gland or
glandular structure.


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Note added at 5 hrs (2013-06-23 21:27:22 GMT)
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http://cancergenome.nih.gov/cancersselected/prostatecancer

Prostate AdenocarcinomaRSS

Last Updated: April 01, 2013
Sample Collection Complete Data Publicly Available
Selected

What is prostate cancer?

Prostate cancer is a disease of the prostate, a walnut-size gland in the male reproductive system. Nearly all prostate cancer is prostate adenocarcinoma. Prostate cancer is graded based on its Gleason score, which it how the cells look under a microscope and ranges from two to ten. A low Gleason score means that the cancer tissue is similar to normal cells and unlikely to spread. A high Gleason score means that the cancer cells are very different from normal cells and are likely to spread. For patients whose cancer has spread, their survival time is usually one to three years. It was estimated that for 2011, 240,890 men would be diagnosed and 33,720 would die from prostate cancer1. View additional information on prostate cancer.

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Note added at 5 hrs (2013-06-23 21:29:55 GMT)
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http://www.cancer.org/cancer/prostatecancer/detailedguide/pr...

Prostate cancer

Several types of cells are found in the prostate, but almost all prostate cancers develop from the gland cells. Gland cells make the prostate fluid that is added to the semen. The medical term for a cancer that starts in gland cells is adenocarcinoma.

Other types of cancer can also start in the prostate gland, including sarcomas, small cell carcinomas, and transitional cell carcinomas. But these types of prostate cancer are so rare that if you have prostate cancer it is almost certain to be an adenocarcinoma. The rest of this document refers only to prostate adenocarcinoma.

Some prostate cancers can grow and spread quickly, but most grow slowly. In fact, autopsy studies show that many older men (and even some younger men) who died of other diseases also had prostate cancer that never affected them during their lives. In many cases neither they nor their doctors even knew they had it.

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Note added at 5 hrs (2013-06-23 21:31:19 GMT)
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So
95% of prostate cancers are adenocarcinoma

whereas the other 5% are

sarcomas, small cell carcinomas, and transitional cell carcinoma.

So if your source text says prostate adenocarcinoma, then use that.