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

NOS, not otherwise specified. Lymph nodes were surgically removed and examined. ^†Lymph node sampling/dissection was not performed.