title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 29-2001. A 14-year-old boy with abnormal bones and a sacral mass.
mesh_terms: D000293:Adolescent; D001706:Biopsy; D001859:Bone Neoplasms / Q000150:complications / Q000188:drug therapy / Q000473:pathology*; D001842:Bone and Bones / Q000002:abnormalities; D003937:Diagnosis, Differential; D006801:Humans; D017674:Hypophosphatemia / Q000175:diagnosis / Q000209:etiology; D007719:Knee Joint / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D016609:Neoplasms, Second Primary / Q000139:chemically induced; D010018:Osteomalacia / Q000175:diagnosis; D012516:Osteosarcoma / Q000150:complications / Q000188:drug therapy / Q000473:pathology*; D010146:Pain / Q000209:etiology; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000139:chemically induced; D012279:Rickets / Q000175:diagnosis* / Q000209:etiology; D012447:Sacrum / Q000473:pathology*