Osteitis fibrosa cystica: Findings on radiograph of the phalanges

(A and B) Posteroanterior (PA) hands. Note the radial margins of the proximal and middle phalanges bilaterally are frayed, irregular, and lace-like (arrows) owing to characteristic subperiosteal resorption. Also note the brown tumor (small arrowhead) and osteolysis of the distal phalanges (large arrowheads).