Leydig cell tumor of the testis: a cytohistological, immunohistochemical, and ultrastructural case study.
We report a case of Leydig cell tumor of the testis in a young man, in whom preoperative diagnosis was achieved by fine-needle aspiration biopsy cytology. Cytology, histology, and ultrastructural examination showed diagnostic Reinke's crystals, both in nuclei and in cytoplasm. Immunohistochemistry displayed strong vimentin and estrogen positivity.
Assi
A
A
Department of Pathology, Legnano General Hospital, Italy.
Sironi
M
M
Bacchioni
A M
AM
Declich
P
P
Cozzi
L
L
Pasquinelli
G
G
D000328:Adult; D001707:Biopsy, Needle; D006801:Humans; D007150:Immunohistochemistry; D007984:Leydig Cell Tumor / Q000473:pathology*; D008297:Male; D013736:Testicular Neoplasms / Q000473:pathology*; D013737:Testis / Q000473:pathology*