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ICD-O-3 Site Codes
In the second and third editions of ICD-O, cancers of the male breast are coded using the schema for tumors of the female breast.
| ICD-O-3 | Term |
|---|---|
| C50.0 | Nipple |
| C50.1 | Central portion of breast |
| C50.2 | Upper-inner quadrant of breast (UIQ) |
| C50.3 | Lower-inner quadrant of breast (LIQ) |
| C50.4 | Upper-outer quadrant of breast (UOQ) |
| C50.5 | Lower-outer quadrant of breast (LOQ) |
| C50.6 | Axillary tail of breast |
| C50.8 | Overlapping lesion of breast |
| C50.9 | Breast, NOS (excludes Skin of breast C44.5); multi-focal neoplasm in more than one quadrant of the breast. |