Table 3.

Joints affected by osteonecrosis in 143 patients^*

	Radiologically Diagnosed	Clinically Diagnosed	Total
Joint	# Joints (%)	# Joints (%)	# Joints (%)
Hip	132 (35·0)	14 (21·9)	146 (33·1)
Knee	147 (39·0)	19 (29·7)	166 (37·6)
Ankle	32 (8·5)	12 (18·8)	44 (10·0)
Shoulder	38 (10·1)	9 (14·1)	47 (10·7)
Elbow	9 (2·4)	5 (7·8)	14 (3·2)
Wrist	8 (2·1)	5 (7·8)	13 (2·9)
Other†	11 (2·9)	0 (0)	11 (2·5)
Total	377 (100)	64 (100)	441 (100)

^*Includes all data received by Children’s Oncology Group through December 2010

^†Heel (5), pelvis (1), femoral diaphysis (4), rib (1)

Surgical procedures (total 139) reported in 62 patients included: 55 total joint replacements (hip 49, knee 6), 23 arthroscopic repairs (hip 2, knee 16, shoulder 5), 43 core decompressions ± bone grafting (hip 22, knee 17, shoulder 4), 1 joint pinning (knee), 2 arthrotomies (1 hip, 1 elbow), and 15 unspecified (hip 4, knee 7, ankle 2, shoulder 1, elbow 1). In addition, 5 joints were treated with steroid injections.