Perthes Lateral Pillar Classification

	Group A=no involvement of lateral pillar -Treatment Age < 8y/o: NSAIDs, ROM exercises, good outcomes regardless of treatment -Treatment Age >8y/o: NSAIDs, ROM exercises
	Group A Xray =no involvement of lateral pillar -Treatment Age < 8y/o: NSAIDs, ROM exercises, good outcomes regardless of treatment -Treatment Age >8y/o: NSAIDs, ROM exercises
	Group B=>50% of lateral pillar height maintained -Treatment Age < 8y/o: NSAIDs, ROM exercises, good outcomes regardless of treatment. -Treatment Age >8y/o: femoral and/or rotational pelvic osteotomy. Gaol: keep femoral head contained within acetabulum. May require presurgical traction,
	Group B=>50% of lateral pillar height maintained -Treatment Age < 8y/o: NSAIDs, ROM exercises, good outcomes regardless of treatment. -Treatment Age >8y/o: femoral and/or rotational pelvic osteotomy. Gaol: keep femoral head contained within acetabulum. May require presurgical traction,
	Group B/C 1=lateral pillar >50% height, but 2-3mm width -Treatment Age < 8y/o: NSAIDs, ROM exercises, good outcomes regardless of treatment. -Treatment Age >8y/o: femoral and/or rotational pelvic osteotomy. Gaol: keep femoral head contained within acetabulum. May require presurgical traction,
	Group B/C 2 = lateral pillar >50% height, but little ossification -Treatment Age < 8y/o: NSAIDs, ROM exercises, good outcomes regardless of treatment. -Treatment Age >8y/o: femoral and/or rotational pelvic osteotomy. Gaol: keep femoral head contained within acetabulum. May require presurgical traction,
	Group B/C 3 = lateral pillar 50% height, but depressed relative to central column. -Treatment Age < 8y/o: NSAIDs, ROM exercises, good outcomes regardless of treatment. -Treatment Age >8y/o: femoral and/or rotational pelvic osteotomy. Gaol: keep femoral head contained within acetabulum. May require presurgical traction,
	Group C=<50% of lateral pillar height maintained -Treatment Age < 8y/o: poor outcome regardless of treatment. -Treatment Age >8y/o: poor outcome regardless of treatment.
	Group C=<50% of lateral pillar height maintained -Treatment Age < 8y/o: poor outcome regardless of treatment. -Treatment Age >8y/o: poor outcome regardless of treatment.