Second Department of Surgery, Department of Pathology, Faculty of Medicine, Toho University, and the Department of Surgery, Kobayashi Hospital, Tokyo, Japan.
Mammary duct ectasia occurs rarely in childhood. The authors report on the case of a pubertal girl who was operated on for duct ectasia with bloody nipple discharge. Duct ectasia is regarded as a primary lesion; it is considered to be a cause of bloody secretion, and it has a mechanism similar to that of mammary duct papilloma. Copyright 2001 by W.B. Saunders Company.