Mesenchymal chondrosarcoma

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

Mesenchymal chondrosarcomas are a rare chondrosarcoma subtype.

Pathology

They are found in both bone and soft tissues (see: extraskeletal chondrosarcoma).

Histology

Mesenchymal chondrosarcomas are characterised by bimorphic histology:

densely packed small round blue cells similar to those seen in Ewing's sarcoma
- cells are seen in a perivascular arrangement which is reminiscent of haemangiopericytomas
malignant cartilagenous tumour

References

Bone tumours

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

bone tumours
- bone-forming tumours
  - adamantinoma of long bones
  - enostosis (bone island)
  - exostosis
    - subungual exostosis
  - osteoid osteoma
  - osteoblastoma
  - osteopoikilosis
  - osteoma
  - osteosarcoma
    - periosteal osteosarcoma
    - parosteal osteosarcoma
      - string sign
- cartilage-forming tumours
- fibrous bone lesions
- bone marrow tumours
- other bone tumours or tumour-like lesions
- skeletal metastases
  - morphology
  - location
  - impending fracture risk
    - Harrington criteria
    - Mirel classification
- staging
  - AJCC staging of musculoskeletal tumours
  - Enneking surgical staging system

Article information

rID: 6227

System: Musculoskeletal

Section: Pathology

Tags: bone tumour, stub, cases, refs

Synonyms or Alternate Spellings:

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