Pseudo–“solid pseudopapillary neoplasms” of the testis: in reality Sertoli cell tumors

We read with interest and concern two reports published in Human Pathology [1,2] concerning testicular neoplasms that were felt to be "testicular analogues" of the well-known "solid pseudopapillary neoplasm" (SPN) of the pancreas, albeit in one of the 2 papers the authors preferred to designate the tumors as primary signet ring stromal tumors of the testis [1]. Although we acknowledge that the pseudopapillae in the SPNs may be limited in amount, their apparent absence, according to the descriptions of the microscopic findings in all of the 14 tumors in these 2 reports, struck us as unusual for a tumor the authors were placing in the SPN category.

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