Linfoma de tejido linfoide asociado a mucosas primario de mama con infiltración de la piel

We present a case of a 39-year-old woman with a 20-year history of rheumatoid arthritis and a 5-month history of a palpable 4 cm lump in the left breast and erythematous skin lesions on both breasts. Radiological findings were similar to those of other malignant tumors. Consequently, histopathological, immunohistochemical and molecular studies were required for diagnosis.