Chondroma CT

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Soujanya Thummathati, MBBS [2]

Overview

Bone CT may be helpful in the diagnosis of chondroma. Findings on CT suggestive of chondroma include chondroid calcifications, mild endosteal scalloping and expansion of the overlying cortex with no cortical invasion, unless fractured.

CT Scan

• Bone CT may be helpful in the diagnosis of chondroma and performed when the radiographic findings are suggestive of the disease and need further evaluation.
• Findings on CT suggestive of enchondroma include chondroid calcifications, mild endosteal scalloping and expansion of the overlying cortex with no cortical invasion, unless fractured.
  • No periosteal reaction is seen.
  • No soft tissue mass is seen.
• Findings on CT suggestive of periosteal chondroma also includes saucerisation of the adjacent bony cortex with a sclerotic periosteal reaction.
  • Most lesions are < 3 cm in size.

Enchondroma; Coronal CT of the right femur showed a lesion with typical ring-and-arc calcifications in the distal diaphysis and metaphysis. The endostal cortical border was not eroded.

Image:Enchondroma-ct-findingsAxial.jpg|Enchondroma; Axial CT of the right femur showed a lesion with typical ring-and-arc calcifications in the distal diaphysis and metaphysis. The endostal cortical border was not eroded.

Image:Juxtacort-chondro-CTcoronal.jpg|Periosteal chondroma; Coronal computed tomography scan showing cortical overhanging margins at the periphery of the lesion (arrow).

Image:Juxtacort-chondroma-axial.jpg|Periosteal chondroma; Axial computed tomography scan showing cortical overhanging margins at the periphery of the lesion (arrow).

References

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