Osteonecrosis in Children and Adolescents With Acute Lymphoblastic Leukemia: Early Diagnosis and New Treatment Strategies.

Background/Aim: In the last few decades, treatment strategies for acute lymphoblastic leukemia (ALL) have been associated not only with improvement of prognosis, but also with an increasing rate of late complication as osteonecrosis (ON). Herein, the cumulative incidence, risk factors, new conservative therapeutic strategies as hyperbaric oxygen therapy (HBO), and outcome of symptomatic ON were studied in pediatric patients with ALL. Patients and Methods: Between 2000 and 2017, 495 children and young adolescents with a diagnosis of ALL were evaluated. All the symptomatic patients underwent magnetic resonance imaging (MRI) to detect bone vascularization and structure. Results: Twenty-three out of 495 patients presented ON (4.6%). ON was associated with an older age (p<0.0001) and a higher steroid dose (p=0.0013). All the patients underwent standard therapies and HBO was performed in 8 of 23 patients. During the follow-up, 15 patients were stable: 6 were totally asymptomatic, 5 complained of pain during activity, and 4 presented mild function limitation. Conclusion: Our data highlight the importance of early diagnosis of ON by screening MRI in asymptomatic patients, in order to start conservative treatment strategies. Moreover, HBO could have beneficial effects on ON patients.