Bizarre parosteal osteochondromatous proliferation of bone (BPOP): an unusual foot mass in a child

This report describes an unusual case of bizarre parosteal osteochondromato us proliferation of bone (BPOP) which developed in the foot of an eight yea r-old child. Also described as Nora's lesion, BPOP is a rare benign bone tu mor found most commonly in the hands and feet with a radiographic appearanc e occasionally confused with malignancy. Resembling osteochondromas at firs t glance, these lesions have a distinct radiographic and histologic appeara nce that permits differentiation from other benign lesions or low-grade mal ignant tumors. Treatment of BPOP consists of simple excision, although ther e is high rate of recurrence. Despite this high recurrence rate, there have been no reported metastases and local excision is still recommended.