β£What are the differential diagnosis for this vague pelvic mass?Ddx = Mets, Myeloma, Chondrosarcoma, Paget's diseaseβ£What are the types of chondrosarcoma?Primary vs SecondarySecondary from osteochondroma (MHE 10% risk), enchondroma (Ollier 30%, Maffucci 100%)β£Are you aware of the subtypes of chondrosarcoma?Low-grade chondrosarcoma - ddx of enchondromaClassic intramedullary chondrosarcomaDe-differentiated chondrosarcoma - most malignant, 5 year survival < 10 %Clear cell ChondrosarcomaMesenchymal chondrosarcomaβ£Management of chondrosarcoma?Wide resectionTypes of pelvic resection as per MSTSType 1 = illiacType 2 = periacetabularType 3 = obturatorβ£Sensitivity to Radio Chemo?Resistant to both