Fig. 13From: Fasciae of the musculoskeletal system: normal anatomy and MR patterns of involvement in autoimmune diseasesAxial FSPD-weighted image of the ankle of a 54-year-old male with psoriatic arthritis. Involvement of the flexor retinaculum (arrows) and subcutaneous fat (arrowheads) with thickening and fluid-like signal is associated with effusion of the synovial sheath (tenosynovitis) of the tibialis posterior and flexor digitorum longus tendons (asterisks)Back to article page