Fig. 1

Radiological examination at first presentation. a Presence of hyperclear, transverse bands on the distal phalanges, characteristic aspect of transverse acro-osteolysis (white arrow). b Presence of transverse lysis of the phalanges (white arrow) and modification of the bone structure of the metatarsals, appearance of a “fracture callus” (grey arrow). The overall symmetrical condition is noteworthy. c Numerous ovoid lesions, with clear centre and hyperdense outline reminiscent of intraosseous chondromes (white arrows). There is no sign of malignancy. d Appearance of a small spur with bellowing of the cortex, probably corresponding to a cortical point fracture (white arrow) and presence of chondromes