Figure 4
A 20-year-old man with alveolar rhabdomyosarcoma. (a) Axial T1- and (b) T2-weighted images of the left hand showing a lobulated mass with mean size of 2.9 cm and peritumoral edema (not shown). Split fat sign was not evident. (c) Heterogeneous enhancement was seen on the axial fat-suppressed contrast-enhanced T1-weighted image. Infiltration along the extensor tendon (arrows) and tail sign (arrowheads) were noted. (d) The mean and minimum ADC values of the lesion were measured to be 0.85 × 10−3 mm2/s and 0.46 × 10−3 mm2/s, respectively. The probability of malignancy was calculated to be between 0.8–0.9 by both models I and II.
