Osteochondroma staging

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Maria Fernanda Villarreal, M.D. [2]

Overview

According to the Musculoskeletal Tumor Society (MSTS) classification, there are 3 stages of osteochondroma based on the tumor activity. Each stage is assigned a number that designate the level of bone erosion. The different stages of osteochondroma, include: stage I, stage II, and stage III.^[1]

Staging

The table below summarizes the staging classification according to the Musculoskeletal Tumor Society (MSTS) for osteochondroma.

**Osteochondroma Staging Classification Based on the Tumoral Activity**
Adapted from Clin Orthop Relat Res. 2010 Jul; 468(7): 2000–2002.^[1]
Stage	Description

Stage I	Inactive or static lesions
Stage II	Actively growing lesions Most osteochondromas occur in this stage.
Stage III	Actively growing lesions that are locally destructive/aggressive Deformity secondary to mass effect Malignant degeneration Low-grade chondrosarcoma

References

↑ ^1.0 ^1.1 Jawad MU, Scully SP (2010). “In brief: classifications in brief: enneking classification: benign and malignant tumors of the musculoskeletal system”. Clinical Orthopaedics and Related Research. 468 (7): 2000–2. doi:10.1007/s11999-010-1315-7. PMC 2882012. PMID 20333492.

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[pmid20333492-1] 1.0 ^1.1 Jawad MU, Scully SP (2010). “In brief: classifications in brief: enneking classification: benign and malignant tumors of the musculoskeletal system”. Clinical Orthopaedics and Related Research. 468 (7): 2000–2. doi:10.1007/s11999-010-1315-7. PMC 2882012. PMID 20333492.

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Osteochondroma staging

Overview

Staging

References

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