We report 4 cases of primary non-hodgkin lymphoma of the uterus.

Purpose: Patients with indolent non-Hodgkin lymphoma typically respond well to first-line immunochemotherapy.

Ninety-two patients with Hodgkin lymphoma and 47 with non-Hodgkin lymphoma were enrolled.

Introduction: Breast involvement by non-Hodgkin lymphoma is particularly rare in men.

Interpretation: SV40 is significantly associated with some types of non-Hodgkin lymphoma.