XXXX involving the prostate. A study of 13 cases.

@entity1 @entity1069 @entity706 @entity5450 @entity828 @entity1503 @entity1876
The clinical and pathologic findings in 13 cases of @entity706 involving the prostate gland were reviewed. The @entity706 tended to occur in elderly @entity1 with a mean age of 60 years (range, 30-86 years) and were clinically manifested by @entity1069 with @entity1876 . In only one of the @entity1 was there clinical suspicion of @entity706 before surgery. Seven @entity1 had primary @entity706 of the prostate, with a variety of histologic subtypes, including small cell lymphocytic (one @entity1 ), diffuse small cleaved cell (two @entity1 ), diffuse mixed small and large cell (two @entity1 ), diffuse large non-cleaved cell (one @entity1 ), and high-grade diffuse small non-cleaved cell (undifferentiated non-Burkitt's) (one @entity1 ). At the time of presentation, none of these @entity1 had @entity828 , @entity1503 , or elevated serum acid phosphatase levels. Six other @entity1 with previously documented @entity706 at other sites had prostatic involvement 2 to 60 months (mean, 14 months) after the primary diagnosis. Histologically, these secondary prostatic @entity706 included diffuse small cleaved cell (two @entity1 ), diffuse mixed small and large cell (one @entity1 ), diffuse large non-cleaved cell (two @entity1 ), and large cell immunoblastic, polymorphous type (T-cell by immunotyping) (one @entity1 ). The mean survival was 14 months for all @entity1 (range, 2-44 months), with no apparent difference between primary and secondary involvement. One @entity1 remains alive 44 months after secondary prostatic involvement with diffuse large non-cleaved cell @entity706 . Although @entity706 involving the prostate are rare, they should be included in the differential diagnosis of lower @entity5450 , particularly in @entity1 with a previous history of @entity706 .
