Primary breast lymphoma with skin involvement arising in lymphocytic lobulitis

Abstract
Primary breast lymphoma is a rare tumour which has recently been associated with pre‐existing lymphocytic lobulitis. We report a patient with lymphocytic lobulitis in whom the lymphoma recurred in the contra‐lateral breast 5 years after the initial presentation, to be followed shortly afterwards by skin involvement. This progression ilustrates the relationship between extra‐nodal lymphomas and underlying autoimmune disease and the homing of lymphomas to related sites.