Table 2 Characteristics on US of DSFP
From: Role of ultrasound in the diagnosis of primary and recurrent dermatofibrosarcoma protuberans
Characteristic | Primary DSFP (n = 23) | Recurrent DSFP (n = 35) | P-value |
|---|---|---|---|
Tumor size (mm) | 21.84 ± 12.20 (6.5–50.33)a | 25.10 ± 20.31 (5.0–80.33)a | 0.093 |
Number of lesion | 1.000 | ||
Single | 20 (90.9%) | 31 (88.6%) | |
Multiple | 2 (9.1%) | 4 (11.4%) | |
Lesion location | 0.000* | ||
D-H | 19 (86.4%) | 13 (37.1%) | |
Hypodermis | 3 (13.6%) | 22 (62.9%) | |
US morphology | 0.038* | ||
Regularly oval | 3 (13.6%) | 10 (28.4%) | |
Tentacle-like projections or “claw” sign | 11 (50.0%) | 5 (14.3%) | |
Lobulated | 4 (18.2%) | 8 (22.9%) | |
Other Irregular Shape | 4 (18.2%) | 12 (34.3%) | |
US echogenicity | 0.455 | ||
Hypoechoic mass | 12 (54.6%) | 25 (71.4%) | |
Mixed hypo | 7 (31.8%) | 7 (20.0%) | |
Hyperchoic | 3 (13.6%) | 3 (8.6%) | |
Blood flow on CDFI | 0.28 | ||
Rich (Alder0-1) | 5 (22.7%) | 19 (54.3%) | |
Not rich (Alder2-3) | 17 (77.3%) | 16 (45.7%) | |
Metastases | 0 | 1 | NS |
US diagnosis | NS | ||
Benign lesion | 8 (34.8%) | 0 (0.0%) | |
Malignant/recurrence lesions | 4 (17.4) | 31 (88.6) | |
Indeterminacy | 11 (47.8%) | 4 (11.4%) |