Table 2.
Comparison of DFSP with and without fibrosarcomatous areas
| Total | Fibrosarcomatous | Rest of cases | ||
|---|---|---|---|---|
| Patients, n (%) | 148 | 16 (10.81) | 132 (89.19) | |
| Ethnicity, n (%) | ||||
| Caucasian | 139 (93.92) | 14 (87.5) | 125 (94.70) | |
| African | 6 (4.05) | 1 (6.25) | 5 (3.79) | |
| South American | 3 (2.03) | 1 (6.25) | 2 (1.51) | |
| Sex, n (%) | ||||
| Female | 74 (50) | 10 (62.5) | 64 (48.48) | |
| Male | 74 (50) | 6 (37.5) | 68 (51.52) | |
| Age at diagnosis, mean (SD), years | 46.28 (14.431) | 54.44 (20.970) | 45.29 (13.199) | |
| Evolution at diagnosis, median (IQR), months | 36 (72) | 42 (99) | 36 (63) | |
| Diameter, median (IQR), cm | 3 (3) | 6.4 (7.5) | 3 (2.2) | p = 0.003 |
| Site (148 tumours), n (%) | ||||
| Head and neck | 15 (10.14) | 2 (12.50) | 13 (9.85) | |
| Chest | 31 (20.95) | 4 (25.00) | 27 (20.45) | |
| Abdomen | 16 (10.81) | 1 (6.25) | 15 (11.36) | |
| Upper back | 43 (29.05) | 2 (12.5) | 41 (31.06) | |
| Lower back | 10 (6.76) | 1 (6.25) | 9 (6.82) | |
| Upper extremities | 10 (6.76) | 2 (12.50) | 8 (6.06) | |
| Lower extremities | 23 (15.54) | 4 (25.00) | 19 (14.39) | |
| Distal extremities (forearm 1, foot 5), n (%) | 6 (4.05) | 1 (6.25) | 5 (3.79) | |
| Previous scar, n (%) | 6 (4.05) | 0 (0) | 6 (4.55) | |
| Pigmented (Bednar tumour), n (%) | 3 (2.03) | 0 (0) | 3 (2.27) | |
| Recurrence, n (%) | 17 (11.49) | 8 (50) | 9 (6.82) | p < 0.001 |