Primary Signet Ring Stromal Tumor of the Testis: A Study of 13 Cases Indicating Their Phenotypic and Genotypic Analogy to Pancreatic Solid Pseudopapillary Neoplasm

Primary signet ring stromal tumor of the testis (PSRSTT) is an extremely rare tumor described only twice in the literature. Pancreatic-analogue solid pseudopapillary neoplasm (SPN) of the testis is a recently reported entity with morphological overlap with PSRSTT. We reviewed our files to find all cases of PSRSTT in order to better characterize this entity. We studied 13 cases of PSRSTTs using histological, immunohistochemical (IHC) and molecular genetic methods and compared the results with pancreatic SPN.

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