Extraskeletal myxoid chondrosarcoma: an unusual tumour in a 6-year-old boy

Extraskeletal (soft-tissue) myxoid chondrosarcoma is an uncommon malignant tumour that usually develops in the fifth, sixth or seventh decade of life. The authors describe its occurrence in a 6-year-old boy. Histologically, the tumour must be differentiated from parachordoma and epithelioid hemangioendothelioma, with which it shares some features.