Fig. 3
From: Fibro-adipose vascular anomaly (FAVA) - diagnosis, staging and management
Imaging findings of FAVA. In a patient with FAVA of calf, a, X-ray plain radiography demonstrated pelvic tilt, leg length discrepancy, and fibular deformity. b, Ankle deformity with ankylosis, and pes cavus was noted on X-ray plain radiography. Intralesional foci of calcification or metaplastic bone tissue could also be seen. c, MRI revealed a mass with heterogeneous high signal infiltrating the posterior muscles in calf. d, CT scan demonstrated the mass contained infiltrative low density tissue, indicating a fatty component. e, She re-walked following radical resection, Achilles tenotomy, and relaxation of ankle capsule. f, In a case of FAVA in calf, contrast-enhanced CT scan revealed decreased arterial branches, and ectatic veins in the affected limb. Note the fibular deformity and leg atrophy. g, X-ray plain radiography revealed thickened cortex of the ulna in a case with FAVA of cubitalis posterior. h, FAVA manifested as a solid, noncompressible, and heterogeneous echogenic mass entirely replacing the normal fibrillary pattern within the affected muscle on ultrasonography study