Endoscopic Resection of Bizarre Parosteal Osteochondromatous Proliferation of the Calcaneocuboid Joint.

Abstract

Bizarre parosteal osteochondromatous proliferation (BPOP), or Nora's lesion, is an unusual, benign, parosteal lesion comprising bone, fibrous tissue, and cartilage. Clinically, the lesions present as slowly growing hard protuberances that are painless in most cases unless they cause local symptoms due to mass effect, including pain, palpable mass, and functional impairment. Surgical resection is indicated when lesions imply pain and functional limitations, aiming at alleviating symptoms and achieving definitive pathological diagnosis in doubtful cases. The purpose of this technical note is to report the details of endoscopic resection of BPOP of the calcaneocuboid joint. This minimally invasive approach minimizes the potential surgical morbidity associated with wide resection.