Research Article
Sarcoma of the Breast: Clinical Characteristics and Outcomes of 991 Patients from the National Cancer Database
Table 1
Patient and tumor characteristics.
| Patient characteristics | Numbers (%) |
| Age | | ≤50 | 294 (29.7%) | 51–75 | 515 (51.9%) | 75< | 182 (18.4%) |
| Gender | | Female | 953 (96.2%) | Male | 38 (3.8%) |
| Race | | NonHispanic white | 645 (65.1%) | Black | 172 (17.4%) | Hispanic | 61 (6.2%) | Asian | 47 (4.7%) | Others/unknown | 66 (6.7%) |
| Treatment facility | | Academic/research program | 327 (33.0%) | Community program | 545 (55.0%) | Unknown | 119 (12.0%) |
| Histology | | Sarcoma, NOS | 252 (25.4%) | Spindle cell sarcoma | 133 (13.4%) | Leiomyosarcoma | 116 (11.7%) | Giant cell sarcoma | 100 (10.1%) | Stromal sarcoma, NOS | 61 (6.2%) | Malignant fibrous histiocytoma | 59 (6.0%) | Fibromyxosarcoma | 36 (3.6%) | Dermatofibrosarcoma | 34 (3.4%) | Fibrosarcoma | 34 (3.4%) | Undifferentiated sarcoma | 31 (3.1%) | Liposarcoma | 31 (3.1%) | Pleomorphic liposarcoma | 22 (2.2%) | Others | 82 (8.3%) |
| Tumor grade | | Well differentiated | 101 (10.2%) | Moderately differentiated | 126 (12.7%) | Poorly differentiated | 292 (29.5%) | Undifferentiated | 205 (20.7%) | Unknown | 267 (26.9%) |
| T stage | | 1 | 451 (45.5%) | 2 | 213 (21.5%) | 3 | 78 (7.9%) | 4 | 74 (7.5%) | Microinvasion | 1 (0.1%) | Unknown | 174 (17.6%) |
| N stage | | 0 | 331 | 1 | 22 | Unknown | 638† |
| M stage | | 0 | 785 | 1 | 73 | Unknown | 133 |
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NOS, not otherwise specified. Lymph nodes were surgically removed and examined. †Lymph node sampling/dissection was not performed. |