Bizarre parosteal osteochondromatous proliferation: an educational review

Area of Science:

• Orthopedic Oncology
• Radiology
• Pathology

Background:

• Bizarre parosteal osteochondromatous proliferation (BPOP) is a rare, surface-based benign chondrogenic bone tumor.
• It typically affects individuals in their third and fourth decades, with a predilection for the hands.

Purpose of the Study:

• To provide a comprehensive overview of BPOP, focusing on imaging characteristics.
• To discuss differential diagnoses, pathological findings, and treatment strategies for BPOP.

Main Methods:

• Review of existing literature on BPOP.
• Analysis of imaging features (radiography, CT, MRI).
• Correlation of imaging findings with histological characteristics and clinical presentation.

Main Results:

• BPOP presents as a well-defined, mineralized mass arising from the periosteal bone surface.
• Key imaging features include periosteal origin, lack of medullary involvement, and characteristic osteocartilaginous proliferation on histology.
• Differential diagnosis includes benign entities like florid reactive periostitis and malignant lesions such as periosteal chondrosarcoma.

Conclusions:

• Accurate multi-modality imaging is crucial for diagnosing BPOP.
• Understanding BPOP's features and differential diagnoses improves patient management.
• Surgical resection is the primary treatment, with awareness of potential local recurrences.