Subungual exostosis

Case contributed by Dr Roberto Schubert

Presentation

Painful toe.

Patient Data

Age: 14 years
Gender: Male
X-ray

Right foot

Sharply marginated dorsolateral exostosis at the 3rd distal toe phalanx.

Case Discussion

Subungual exostoses are benign osteocartilaginous tumors. They mostly affect the big toe and are predominantly found in children and young adolescents. They probably result from metaplasia in mechanical irritations or diseases of the nailbed. The precise etiology is unknown 1.

The lesion seems to be distinct from osteochondroma 2 and also has to be differentiated from Nora's lesion (BPOP) and aggressive lesions.

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Case information

rID: 14815
Published: 29th Aug 2011
Last edited: 15th Feb 2020
Inclusion in quiz mode: Included

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