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.
Codman's triangle
Introduction
Codman’s triangle is a term used to describe the triangular area of new subperiosteal bone that is created when a lesion, often a tumour, raises the periosteum away from the bone. [1]
The main causes for this symptom are osteosarcoma, Ewing’s sarcoma, and a subperiosteal abscess.[1]