Primary breast lymphoma is a rare tumour which has recently been assoc
iated with pre-existing lymphocytic lobulitis. We report a patient wit
h lymphocytic lobulitis in whom the lymphoma recurred in the contra-la
teral breast 5 years after the initial presentation, to be followed sh
ortly afterwards by skin involvement. This progression illustrates the
relationship between extra-nodal lymphomas and underlying autoimmune
disease and the homing of lymphomas to related sites.