Fig. 1.
Representative radiographic images of bizarre parosteal osteochondromatous proliferation. All were taken of the hands except for D, which is of the toes. (A) Dorsal multilobular radiodensity of the fourth distal phalanx with surrounding soft tissue prominence that has no apparent communication to the underlying bone marrow. (B) Parosteal radiodense mass adjacent to the middle phalanx of the third digit, appears to be a surface lesion. (C) Soft tissue mass with radiodensity distal to the distal phalanx. (D) Soft tissue mass with peripheral radiodensity that is associated with the distal phalanx, probably with periosteal reaction. Appearance of this lesion is less mature than in the prior examples. (E) Dorsal soft tissue lesion with internal radiodensity at the level of the interphalangeal joint of the thumb. Note similarity to radiograph in part A. (F) Radiodense mass at the proximal aspect of the proximal phalanx of the digit. From this view, possible attachment to the adjacent bone cortex cannot be excluded. (G) Volar surface lesion along the distal phalanx with peripheral radiodensity. (H) Large radiodense mass with smooth external border along the proximal metacarpal of the long finger with unclear relationship to the underlying bone.