drilling

NHx

European Orthopaedic Paediatric Study JPO 1999

- 452 patients

- juvenile and adult

Findings

- stable lesion with cartilage intact and no dissection had good prognosis

- if signs dissection, surgical management better than non surgical

- sclerosis on x-ray poor prognostic sign

- lesions > 2cm poor prognosis

- 20% OCD in juveniles abnormal x-ray findings at 3 years (not benign process)

SONK              vs                          Atraumatic AVN

>55                                              Often mid 30's