C50.0 - Malignant neoplasm of nipple and areola
C50.02 - Malignant neoplasm of nipple and areola, male
C50.021 - Malignant neoplasm of nipple and areola, right male breast
C50.022 - Malignant neoplasm of nipple and areola, left male breast
C50.029 - Malignant neoplasm of nipple and areola, unspecified male breast