Table 3.

Radiographic findings, percentage of collapse

Type	Type 1 (< 50% collapse)	Type 2 (> 50% collapse)
A	Primary germ cell tumor Eosinophilic granuloma Eosinophilic granuloma Eosinophilic granuloma Eosinophilic granuloma Eosinophilic granuloma Spondylometaphyseal dysplasia idiopathic Eosinophilic granuloma	Eosinophilic granuloma Eosinophilic granuloma Eosinophilic granuloma Eosinophilic granuloma Eosinophilic granuloma Osteogenesis imperfecta Osteogenesis imperfecta Idiopathic Idiopathic Sacrococcygeal teratoma
B	CRMO CRMO ALL ALL	Eosinophilic granuloma Eosinophilic granuloma CRMO Giant cell tumor

CRMO = chronic recurrent multifocal osteomyelitis; ALL = acute lymphoblastic leukemia.