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Health Dictionary

Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Osteochondroma staging

Introduction

Overview

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

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

References

  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.

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