English: Intermediate magnification micrograph of a Leydig cell tumour of the testis. H&E stain. Leydig cell tumours fall in the sex cord-stromal tumour subgroup of testicular tumours.

Leydig tumour shown has:

• cells with moderate nuclear size variation, and cells with:
  • prominent round central nucleoli, and an
  • eosinophilic vacuolated cytoplasm.

Classically, Leydig tumours have Reinke crystals, cylindrical crystalloid eosinophilic cytoplasmic bodies; these are not apparent in the micrograph.

See also

• Image:Leydig_cell_tumour1.jpg - low magnification view.
• Image:Leydig_cell_tumour3.jpg - high magnification view.