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Bizarre Parosteal Osteochondromatous Proliferation Arising From the Second Rib: A Case Report
Yuji Nojima1, Hiroki Sugiyama1, Takashi Matsutani1
1Department of Surgery, Division of General Thoracic Surgery Kawasaki Medical School Kurashiki, Okayama Japan.
Clinical Case Reports
|June 15, 2026
Summary
Bizarre parosteal osteochondromatous proliferation (BPOP), a rare bone lesion, can occur in ribs. This case highlights BPOP as a differential diagnosis for rib masses, emphasizing the need for long-term patient follow-up.
Area of Science:
- Orthopedic Oncology
- Radiology
- Pathology
Background:
- Bizarre parosteal osteochondromatous proliferation (BPOP) is a rare benign bone lesion.
- Typically, BPOP affects the small bones of the hands and feet.
Purpose of the Study:
- To report a rare case of BPOP originating from the rib.
- To emphasize BPOP in the differential diagnosis of rib lesions.
Main Methods:
- Case report of a 41-year-old man with a left second rib lesion.
- Diagnostic imaging included chest X-ray and CT scan.
- Surgical resection for diagnosis and treatment, followed by histopathological examination.
Main Results:
- BPOP was diagnosed via postoperative histopathology.
- The lesion was incidentally detected as a "pulmonary mass" on chest X-ray.
- CT imaging showed a 4.1 x 2.2 cm lesion in the left second rib.
Conclusions:
- BPOP should be considered in the differential diagnosis of rib lesions, particularly osteocartilaginous ones.
- Long-term follow-up is recommended due to the potential for recurrence.
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