Unexpected presentation of accessory breast cancer presenting as a subcutaneous mass at costal ridge: a case report

Unexpected presentation of accessory breast cancer presenting as a subcutaneous mass at costal ridge: a case report:



During embryogenesis, bilateral thickening of ectoderm from anterior axillary folds to inguinal folds, called mammary ridges or milk lines, develops into breast tissues. Only a pair in the pectoral area is spa...