An expansile bony lesion is seen involving the proximal phalanx of the index finger with an intact hypointense bony cortex. The lesion displays intermediate SI in T1 WIs, and high SI in T2 and proton-density images. The lesion shows islands of signal void calcifications, as well as areas of bony matrix within its substance. The absence of cortical destruction and extraosseous soft tissue component reflects the lesion's benign nature.