title: Mesenchymal chondrosarcoma of the orbit.
abstract: OBJECTIVE
  To report a case of mesenchymal chondrosarcoma of the orbit and describe its clinical features, radiological findings and management.
  
  
  METHODS
  Interventional case report.
  
  
  RESULTS
  A 50 year old man presented with right sided proptosis of 3 months duration. CT scan showed well circumscribed lobulated extraconal mass lesion in the inferotemporal qaudrant with specked calcification within. Patient underwent excisional biospsy with excision of mass lesion in toto. Histopathological examination was suggestive of mesenchymal chondrosarcoma of orbit. Post operatively patient was advised radiotherapy.
  
  
  CONCLUSIONS
  Orbital mesenchymal chondrosarcoma is a rare tumor characterized by undifferentiated mesenchymal cells with islands of mature hyaline cartilage. Multimodality treatment (surgery, chemotherapy, and radiotherapy) may lead to long-term survival.
authors.affiliation: Department of Orbit, Oculoplasty, Reconstructive & Aesthetic Services, Sankara Nethralaya, Chennai, India.
authors.forename: Ravija
authors.initials: R
authors.lastname: Patel
authors.forename: Bipasha
authors.initials: B
authors.lastname: Mukherjee
mesh_terms: D001706:Biopsy; D018211:Chondrosarcoma, Mesenchymal / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D005094:Exophthalmos / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014792:Visual Acuity / Q000502:physiology