| N63 | Unspecified lump in breast |
| | Unspecified lump in unspecified breast |
| | Unspecified lump in the right breast |
| | Unspecified lump in the right breast, unspecified quadrant |
| | Unspecified lump in the right breast, upper outer quadrant |
| | Unspecified lump in the right breast, upper inner quadrant |
| | Unspecified lump in the right breast, lower outer quadrant |
| | Unspecified lump in the right breast, lower inner quadrant |
| | Unspecified lump in the right breast, overlapping quadrants |
| | Unspecified lump in the left breast |
| | Unspecified lump in the left breast, unspecified quadrant |
| | Unspecified lump in the left breast, upper outer quadrant |
| | Unspecified lump in the left breast, upper inner quadrant |
| | Unspecified lump in the left breast, lower outer quadrant |
| | Unspecified lump in the left breast, lower inner quadrant |
| | Unspecified lump in the left breast, overlapping quadrants |
| | Unspecified lump in axillary tail |
| | Unspecified lump in axillary tail, of the right breast |
| | Unspecified lump in axillary tail, of the left breast |
| | Unspecified lump in breast, subareolar |
| | Unspecified lump in right breast, subareolar |
| | Unspecified lump in left breast, subareolar |
