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[Adrenal-like Leydig cells (author's transl)].

Adrenal-like lipoid-rich Leydig cells, which could be found in a cryptorchid testis, were investigated by light and electronmicroscopy. There were nodular and diffuse proliferation of these adrenal-like cells in the interstitium of the testis. Electronmicroscopically these cells are fasciculated and characterized by large liposomes, many tubulovesicular mitochondria, and a large smooth endoplasmatic reticulum. But the presence of crystals of Reinke in these cells underlined their relationship to Leydig cells. The clinical history of this case is characterised by an extreme adipositas (167 kg) and high urinary estrogenexcretion. This excretion could be suppressed with dexamethasone and stimulated with HCG. After orchiectomy estrogen excretion decreased for 4 months and then increased again, after ACTH stimulation performed by reason of adrenal insufficiency. At this time there is no evidence of adrenal tumor; in the contralateral, scrotal testis, spermiogenesis and Leydig cells are without pathologic changes as revealed by biopsy.