Turret exostosis

Dr Henry Knipe and Dr Yuranga Weerakkody et al.

Turret exostoses are a benign osteocartilaginous lesion.


A turret exostosis is believed to arise from reactive periosteum after relatively mild trauma. It is usually seen as a smooth dome-shaped parosteal bone proliferation. 


Turret exostoses are most often found in the phalanges but may also present in rare sites such as the talus 1.

Differential diagnosis

In certain situations, consider:

Bone tumours

The differential diagnosis for bone tumors is dependent on the age of the patient, with a very different set of differentials for the pediatric patient.

Article information

rID: 71769
Synonyms or Alternate Spellings:
  • Turret exostoses

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Cases and figures

  • Case 1: turret exostosis of thumb distal phalanx
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  • Case 2
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