Malignant neoplasm of axillary tail of unsp male breast

This code signifies a cancerous tumor originating in the axillary tail (tail of Spence) of an unspecified male breast. It indicates the presence of a primary malignant neoplasm in this specific anatomical region.

Apply this code when documentation confirms a primary malignant neoplasm located in the axillary tail of a male patient's breast, and the laterality (left or right) is not specified. Supporting documentation would include pathology reports confirming malignancy and imaging reports or operative notes detailing the tumor's location.

• Ensure the documentation explicitly states "axillary tail" and "male breast" for accurate coding.
• Avoid using this code if the laterality (left or right breast) is documented; instead, choose the more specific C50.611 or C50.612.
• This code represents the primary site; secondary malignancies or metastatic disease should be coded separately.