Fig. 24

Chronic calcific tendinopathy in a patient presenting with 10-year history of focal swelling along the volar aspect of the left middle finger.(a) Plain radiograph shows well-defined scalloping along the volar aspect of the middle finger proximal phalanx with an overlying striated pattern of calcification (arrow). (b) T1w sequence shows focal swelling of the flexor digitorum longus tendon (arrow) causing scalloping of the underlying bone. No discrete mass is seen. (c) There is a mild increase in signal in the tendon on T2-FS sequence suggesting tendinosis. There is bony scalloping but no significant marrow oedema, suggesting a chronic process. (d) Diffuse thickening and intense enhancement of the tendon sheath is seen, reflecting an element of active tenosynovitis (arrow)