Sertoli cell nodule

A Sertoli cell nodule is a benign proliferation of Sertoli cells that arises in association with cryptorchidism (undescended testis).^[1] They are not composed of a clonal cell population, i.e. neoplastic; thus, technically, they should not be called an adenoma.^[2]

Sertoli cell nodule
Other names	Pick's adenoma, testicular tubular adenoma, tubular adenoma of the testis
Micrograph of a Sertoli cell nodule. H&E stain.
Specialty	Urology

Pathology

Sertoli cell nodules are unencapsulated nodules that consist of:^[2][3][4]

1. cells arranged in well-formed tubules (that vaguely resemble immature Sertoli cells), with
2. bland hyperchromatic oval/round nuclei that are stratified, and
3. may contain eosinophilic (hyaline) blob in lumen (centre).

• 
  Micrograph of a Sertoli cell nodule. H&E stain.
• 
  Micrograph of a Sertoli cell nodule. H&E stain.