Tumors and cysts—benign Aneurysmal bone cyst Enchondroma Eosinophilic granuloma Fibrous dysplasia Giant cell tumor Nonossifying fibroma Osteochondroma Unicameral bone cyst Tumors—malignant Chondrosarcoma Ewing sarcoma Neuroblastoma Osteogenic sarcoma Hereditary diseases Gaucher disease Neurofibromatosis Osteogenesis imperfecta Osteopetrosis Sickle cell disease Metabolic disorders Copper deficiency Cushing syndrome Hyperparathyroidism Renal osteodystrophy Rickets Scurvy Neuromuscular diseases (osteoporosis from disuse) Cerebral palsy Muscular dystrophy Poliomyelitis Severe head injury Spina bifida with paraplegia Traumatic paraplegia or quadriplegia