Characteristics of Patients with Male Breast Cancer and Their Primary Tumors
| Characteristic | n (%) |
| No. of patients | 39 |
| Median age (y) | 62 (range, 31–90) |
| Race | |
| African American | 4 (10) |
| Asian | 3 (8) |
| Caucasian | 31 (79) |
| Other | 1 (3) |
| Histology | |
| Ductal | 37 (95) |
| Adenoid cystic | 1 (3) |
| Papillary | 1 (3) |
| Tumor grade | |
| High | 28 (72) |
| Intermediate | 9 (23) |
| Unknown | 2 (5) |
| Receptor status | |
| ER+/HER2− | 33 (84) |
| HER2+ | 5 (13) |
| Triple-negative | 1 (3) |
| BRCA1 or 2 mutation | |
| Yes | 4 (10) |
| No | 16 (41) |
| Unknown | 19 (49) |
| Initial staging | |
| Pre-PET/CT stage | |
| I | 2 (5) |
| IIA | 6 (15) |
| IIB | 19 (49) |
| IIIA | 5 (13) |
| IIIB | 4 (10) |
| IIIC | 3 (8) |
| T stage | |
| T1 | 5 (13) |
| T2 | 29 (74) |
| T3 | 1 (3) |
| T4 | 4 (10) |
| N stage | |
| N0 | 10 (26) |
| N1 | 22 (56) |
| N2 | 4 (10) |
| N3 | 3 (8) |
| M stage, M0 | 39 (100) |
Data in parentheses are percentages, unless otherwise indicated.