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Extraskeletal chondrosarcoma

Dr Henry Knipe ◉ ◈ and A.Prof Frank Gaillard ◉ ◈ et al.

Extraskeletal chondrosarcomas make up only 2% of soft-tissue sarcomas and only 1% of all chondrosarcomas.

On this page:

Article:

Pathology
Radiographic features
Differential diagnoses
Related articles
References

Images:

Cases and figures

Pathology

They tend to be of higher grade than run-of-the-mill conventional intramedullary chondrosarcomas, with the majority being of the myxoid (most common) or mesenchymal varieties ³.

Location

Extra skeletal myxoid chondrosarcomas typically occur in the extremities, with the thigh being most common. They occur at all ages but typically around the age of 50 ³.

Extra skeletal mesenchymal chondrosarcomas on the other hand tend to occur in young adults. They are seen also in the thigh, but also have a predilection for the head and neck, occurring in the meninges, the orbit and even in the brain.

Chondrosarcomas have been reported in most other parts of the body, although with less frequency, including:

meninges of the brain and spinal cord (most common)
lower limb (particularly thigh)
soft tissues of the head and neck
- orbit
- larynx
- sinonasal cavity ⁴
solid organs
- pancreas ²

Radiographic features

Their appearance is the same as that of chondrosarcomas elsewhere (see generic chondrosarcoma article for radiographic features).

Differential diagnoses

sarcomas
benign lesions
- myositis ossificans

References

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.

bone tumors
- bone-forming tumors
- cartilage-forming tumors
- fibrous bone lesions
- bone marrow tumors
- other bone tumors or tumor-like lesions
- skeletal metastases
  - morphology
  - location
  - impending fracture risk
    - Harrington criteria
    - Mirel classification
- staging
  - AJCC staging of musculoskeletal tumors
  - Enneking surgical staging system

Article information

rID: 6531

System: Musculoskeletal

Synonyms or Alternate Spellings:

Extraskeletal chondrosarcoma
Extra skeletal chondrosarcomas

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Cases and figures

Case 1: laryngeal chondrosarcomaCase 1: laryngeal chondrosarcoma

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Case 2Case 2

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