Condylar Osteochondroma — MFDS Part 1 MCQ
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Correct answer: B — Progressive facial asymmetry and malocclusion with unilateral condylar enlargement
Osteochondroma of the mandibular condyle is a rare, slow-growing, cartilage-capped bony lesion. Progressive unilateral condylar enlargement alters mandibular growth and position, producing facial asymmetry and a developing malocclusion; a hard preauricular mass and chin deviation away from the affected side may also occur. Bilateral condylar resorption instead causes loss of ramal height, mandibular retrusion and often an anterior open bite. Bony fusion across the joint is characteristic of TMJ ankylosis rather than osteochondroma. Trismus or preauricular pain can occur with many TMJ disorders, but when isolated and accompanied by normal condylar morphology, facial symmetry and occlusion, they do not indicate an enlarging condylar tumour.
Reference: Sharma G, Shorafa M, Hans G. Management of progressive facial asymmetry owing to a rare temporomandibular joint tumour: A case report. Journal of Orthodontics. 2020;47(2):163-169. https://pubmed.ncbi.nlm.nih.gov/11848198/