Chondroma



Chondroma


David R. Lucas, MD










CT depicts a mineralized soft tissue chondroma image adjacent to the 4th metatarsal. Soft tissue chondroma has a predilection for the hands and feet, often near a joint or tendon.






Soft tissue chondroma typically appears as a well-circumscribed tumor composed of hyaline cartilage lobules image with extensive calcification image and sharp demarcation from adjacent soft tissue (top).


TERMINOLOGY


Synonyms



  • Extraskeletal chondroma, chondroma of soft parts, fibrochondroma, osteochondroma, myxochondroma, chondroblastoma-like chondroma of soft tissue


Definitions



  • Benign hyaline cartilage neoplasm of soft tissue with predilection for hands and feet


  • Only rare reports of primary cutaneous tumors (chondroma cutis)


CLINICAL ISSUES


Epidemiology



  • Incidence



    • Uncommon; exact incidence unknown


    • Exceedingly rare as cutaneous primary


  • Age



    • Median: 4th decade; range: Infancy to 9th decade


  • Gender



    • Women and men equally affected


Presentation



  • Painless mass


  • Most common in hands and feet (60-95%), especially fingers (40-50%)



    • Rare reports in proximal extremities, trunk, head and neck, upper aerodigestive tract, dura, skin, fallopian tube


Treatment



  • Surgical approaches



    • Simple excision


Prognosis



  • Low recurrence rate (15-20%)



    • Recurrences controlled by reexcision


  • No reports of malignant degeneration


IMAGE FINDINGS


General Features



  • Best diagnostic clue



    • Small, well-demarcated, mineralized soft tissue mass in acral extremity


  • Location



    • Hands and feet


    • Often in vicinity of joint or tendon


    • No intraarticular or subperiosteal localization by definition


  • Morphology



    • Most are calcified or ossified


    • Sometimes erode and deform underlying bone

Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Chondroma

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