Woffian tumour:The microcysts containing an eosinophilic material result in a sieve-like appreance.The tumour cells may be spindle-shaped and form iuregularly-shaped tubules simulating a retiroum pattern.Atumour of presumptive wolffian origin characterized by a variety of epithelial patterns.Thsi epithelial tumour may show diffuse, solid tubular, hollow tubular an sieve-like patterns, and combinations of the various patterns may occur. Cases have been reported associated with endometrial hyperplasia.

Prognosis and predictive factors: These tumours typically are not aggressive; however, a significant minority of patients have had an aggreesive course. The malignant cases sometimes, but not always, show nuclear atypia and increased mitotic activity.