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Pathology of the Benign and Malignant Diseases of the Prostate

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Prostate MRI Essentials

Abstract

The prostate gland, a male reproductive organ, is located posterior to the inferior symphysis pubis, superior to the urogenital diaphragm, and anterior to the rectum. McNeal has identified three zones. The transition zone surrounds the urethra between the colliculus and bladder neck; it is the usual location of benign prostatic hyperplasia. The peripheral and central zones are the most common locations of the putative preneoplastic and intra-acinar/intraductal neoplasms, such as prostatic intraepithelial neoplasia and intraductal carcinoma of the prostate. Atypical adenomatous hyperplasia (adenosis; AAH) has been considered a premalignant lesion of the transition zone; a direct transition from AAH to cancer has not been documented. Atypical small acinar proliferation (ASAP; also called atypical focus suspicious but not diagnostic of malignancy) is a diagnostic category and represents a microscopic growth of small acini with insufficient cytological abnormalities to warrant the diagnosis of malignancy. Prostate cancer (PCa) is the most frequently diagnosed noncutaneous malignant neoplasm in men. This chapter discusses the classification, grading, staging, and current definition of clinically significant PCa. Tissue biomarkers predicting upgrading and/or significant disease and tissue-based genomic tests for diagnosis and prognosis are mentioned briefly.

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Montironi, R., Mazzucchelli, R., Cimadamore, A., Scarpelli, M., Lopez-Beltran, A., Cheng, L. (2020). Pathology of the Benign and Malignant Diseases of the Prostate. In: Tirkes, T. (eds) Prostate MRI Essentials. Springer, Cham. https://doi.org/10.1007/978-3-030-45935-2_1

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