C50.6 - Malignant neoplasm of axillary tail of breast
C50.62 - Malignant neoplasm of axillary tail of breast, male
C50.621 - Malignant neoplasm of axillary tail of right male breast
C50.622 - Malignant neoplasm of axillary tail of left male breast
C50.629 - Malignant neoplasm of axillary tail of unspecified male breast