A Rare Tumor at an Unusual Age: Pediatric Bizarre Parosteal Osteochondromatous Proliferation Nora's Lesion of the Phalanx

Bizarre parosteal osteochondromatous proliferation (BPOP) is a rare lesion that usually arises in short bones of the hand and feet. It is typically seen in the third and fourth decades, seldom seen in the pediatric age group. A 6-year-old girl was presented with swelling over the ring finger of the left hand. The radiograph showed ectopic calcification and periosteal reaction in the ring finger. Computed tomography was performed, and a BPOP diagnosis was made on the preoperative finding. Excision of the lesion with overlying pseudocapsule and decortication was performed with a piezoelectric device. The patient is currently in a routine follow-up without recurrence. There is not enough data for treatment and follow-up BPOP in pediatric patients. The present case would contribute to the literature in the management of this rare presentation.

Automated summary

Bizarre parosteal osteochondromatous proliferation (BPOP) is a rare lesion that primarily affects the short bones of the hand and feet. It is typically seen in individuals in their 30s or 40s, and is uncommon in children. This case report describes a 6-year-old girl who presented with swelling in the ring finger of her left hand, and after surgical treatment, she has not experienced any recurrence.