TY - JOUR T1 - Ectopic lobular breast cancer on the anterior chest wall: a rare entity JF - Journal of Clinical Pathology JO - J Clin Pathol SP - 940 LP - 941 DO - 10.1136/jcp.2005.034488 VL - 60 IS - 8 AU - M Y A van Herwaarden-Lindeboom AU - R van Hillegersberg AU - P J van Diest Y1 - 2007/08/01 UR - http://jcp.bmj.com/content/60/8/940.abstract N2 - A 46-year-old woman with a rare case of infiltrating lobular carcinoma in ectopic breast tissue on the anterior chest wall is presented. Wide local excision and lymphatic mapping with, consequently, a sentinel node biopsy, seem adequate therapy for ectopic breast cancer. Ectopic breast tissue arises from the primitive milk line, with an incidence of 0.6–6%.1 Malignant transformation is rare.2 The most frequently occurring manifestation is infiltrating ductal carcinoma, comprising 79% of all ectopic breast malignancies.3 Lobular-type and medullary-type carcinomas are seen in <10% of cases.4 Furthermore, most carcinomas in the ectopic breast tissue are located in the vulva and axilla (ie, 55–65%).5 The chest wall is the most unusual location.6 We present a patient with lobular carcinoma in ectopic breast tissue located on the anterior chest wall. A 46-year-old Caucasian woman presented with a subcutaneous mass in a cicatrice of the anterior chest wall approximately 1–2 cm below the caudal rim of the mammary … ER -