Juxta-cortical chondroma

Case contributed by Dr Dalia Ibrahim


Right middle finger distal phalangeal swelling

Patient Data

Age: 38
Gender: Female

Well defined soft tissue mass showing foci of calcfications and adjacent bony remodeling, it erodes and induces sclerosis in the contiguous cortical bone producing the characterstic "Pop corn" apperance.


Fairly defined soft tissue mass lesion, clearly demarcated from the medullary cavity by rim of cortical bone. It elicits low signal at T1, high signal at T2 WI and being of bright signal at STIR WI showing non homogenous post contrast enhancment.

Ill defined marrow edema signal of the distal phalanx. 

Case Discussion

Biopsy proven.

Chondromas are benign tumors composed of mature hyaline cartilage, these tumors are named according to their location such as;

Enchondroma: when they occur in the medullary canal of the bone.

Periosteal or juxta-cortical chondroma: when they occur on the surface of the bone.

Soft-tissue or synovial chondroma: when they arise from the synovial sheaths of tendons or in the soft tissue sheaths.

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