[Chronic ulnocarpal calcareous bursitis].

There are reported three cases of nodular calcifications of the ulnocarpal region with very similar clinical and radiological aspects. The isolated nodules or the double, contigue one, are located near the pisiform bone, proximal to it, in the obliqual palmo-dorsal projection with semisupine hand. These nodules are projected on the ulnar styloid with the dorso-palmar projection. Clinical-radiological characteristics suggest a diagnosis of chronic bursitis that corresponds with the insertion on the pisiform bone of the flexor carpi ulnaris tendon. Differential diagnosis faces, besides the calcification in the tendinous sheths, also the accessory pisiform bone and the flake fractures, not joined, of the pisiform.