[Lymphoma or testicular seminoma: histopathological aspects of the differential diagnosis]

Differential diagnosis between seminoma versus primary lymphoma of the testis can be difficult in some observations. Well established data, concerning epidemiological, clinical and radiological findings with histological results allows the right diagnosis to be made in most of cases. Cytological study of tumor prints is always interesting for uncertain cases. Therefore, if doubts persist, immunohistological study, even performed on paraffin embedded material, is the best method.