Enfermedad de Rosai-Dorfman en mama de paciente masculino: una entidad rara

Rosai-Dorfman disease is a rare entity that affects the lymphatic tissue; up to 43% of cases may have extranodal involvement. The aetiology is unknown but immune dysfunction has been suggested. This disease is characterised by dilation of the lymphatic sinusoids, caused by an increase in the number of histiocytes, which are accompanied by multiple plasma cells. Inflammatory cells are found in the cytoplasm of the histiocytes, a phenomenon known as «emperipolesis». We present the case of a male patient who presented with a tumour in the right breast. Studies confirmed Rosai-Dorfman disease. The diagnosis was made by biopsy and pathological analysis. This condition may be confused with breast cancer. The interest of this case lies in the low frequency of this entity in the breast tissue of male patients.