Ewing's sarcoma of the calcaneus.
D000293:Adolescent; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D002111:Calcaneus / Q000473:pathology / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D012512:Sarcoma, Ewing / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery