microscopically , the differential points consist of duct hypertrophy and periductal fibrosis ( gynecomastia ) , absence of any ductal involvement by carcinoma cells , frequent presence of cancer cells in lymphatics and vascular channels , morphologic similarity between the cancers in the breast and prostate , and finally , the usual presence of acid phosphatase in the tumors of the prostate and breast .
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prostate
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the tumors of