Subungual exostosis

Case contributed by Dr Roberto Schubert


Painful toe.

Patient Data

Age: 14
Gender: Male

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 unknown1.

The lesion seems to be distinct from osteochondroma2 and also has to be differentiated from a Nora's lesion (BPOP) and aggressive lesions.

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Case information

rID: 14815
Published: 29th Aug 2011
Last edited: 13th Aug 2019
Inclusion in quiz mode: Included

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