Malignant neoplasm of overlapping sites of unsp male breast

This code signifies a cancerous tumor that spans across multiple contiguous anatomical regions within the male breast, where the specific boundaries of the primary tumor cannot be clearly delineated. It indicates an invasive malignancy affecting more than one quadrant or extending into adjacent structures of the male breast, without further specification of the exact location.

Use this code when documentation confirms a malignant neoplasm in a male patient that involves overlapping sites of the breast, and the specific laterality (left or right) is not documented. This code is appropriate when the physician explicitly states "overlapping sites" or describes a tumor that crosses anatomical boundaries within the breast, and the laterality is unknown.

• Only use this code when the documentation explicitly states "overlapping sites" and the laterality is unspecified.
• Avoid using this code if a more specific site or laterality can be determined from the medical record; always strive for the highest level of specificity.
• Do not confuse with C50.929 (Malignant neoplasm of unspecified site of unspecified male breast), which is used when the exact location within the breast is unknown, not necessarily overlapping.