Ovary, Leydig cell tumour

Details
Disease Category
Gender
Age
49 years
Organ System/Discipline
Diagnosis
Leydig cell tumour
Clinical History

49 year-old female patient with a unilateral ovarian tumour.

Case Discussion

Sections show a well demarcated lesion composed of sheets of round-polygonal cells with abundant eosinophilic cytoplasm. Occasional bizarre atypia is noted. An important histological finding is the presence of Reinke crystals: rectangular, eosinophilic intracytoplasmic crystals, which are characteristic and necessary for distinguishing from other steroid cell tumours.

The lesion showed immunoreactivity for inhibin, calretinin, and MART-1 (not shown), which are supportive of this diagnosis.

Signs and symptoms related to excess androgen are commonly encountered in these patients. Prognosis is excellent, and unilateral salpingo-oophorectomy is generally sufficient for management.

Compare this case with an example of Sertoli-Leydig cell tumour, LMP12501 (see Related Content)

Image Contributors
Yoon, J., Chang, M.

Cite

Yoon, J., Chang, M. Ovary, Leydig cell tumour. Digital Laboratory Medicine Library, Dept of Laboratory Medicine & Pathobiology, University of Toronto. Published . Accessed December 17, 2025. https://dev.dlml.cflabs.ca/image/ovary-leydig-cell-tumour-lmp31571