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Background: Patients with pediatric leukemia and sickle cell disease are at risk for developing osteonecrosis (ON), a disease that can result in pain, loss of function, and disability. Hip core decompression surgery is an option aimed to prevent femoral head collapse and avoid future arthroplasty., Objective: Describe functional outcomes and gait quality among a young population with hip ON before and after hip core decompression., Methods: Study included participants with hip ON secondary to treatment for hematologic malignancy or sickle cell disease, between 8 and 29 years old, requiring hip core decompression surgery. At one-year follow-up, 13 participants (9 male, median age 17 years) completed the Functional Mobility Assessment (FMA), range of motion, and GAITRite ® testing., Results: Participants demonstrated improved mobility and endurance on the FMA at 1-year post-operatively compared to pre-operatively, with higher scores for time on the Timed Up and Go (mean FMA score = 2.92 [SD = 1.32] vs. 2.07 [SD = 1.70]), time on the Timed Up and Down Stairs (3.69 [0.85] vs. 2.92 [1.66]), and 9-Minute Walk Test scores for distance walked (2.69 [0.63] vs. 2.23 [0.93]) and heart rate (4.54 [0.66] vs. 3.31 [1.38]). GAITRite ® analysis also showed improvements in many gait parameters at one-year follow-up., Limitations: Cancer treatment complications other than ON could have contributed to results, not all eligible participants agreed to participate, and follow-up was only one year., Conclusions: Young patients with hip ON demonstrated improvements in functional mobility, endurance, and gait quality one year following hip core decompression., Competing Interests: Conflicts of Interest: All authors have declared no conflicts of interest.

Background and Purpose/objective: Mirror therapy has not been reported for phantom limb pain (PLP) in pediatric oncology. Our aims are to describe the incidence and duration of PLP post-amputation, the duration of follow-up, pain scores and pain medications, and the differences between a group that received mirror therapy (MT) in addition to the standard treatment and a group that received only the standard treatment (non-MT)., Methods: A retrospective review of patients' medical records from June 2009 to March 2015 was completed. The demographic characteristics, diagnoses and types of surgery were collected. The incidence and duration of PLP, duration of pain service follow-up, pain medications and pain scores were collected and analyzed using the Wilcoxon rank sum test., Results: Of 21 patients who underwent amputations (median age 13 years, range, 8-24 years), most common primary diagnosis osteosarcoma), 18 (85.7%) experienced PLP; 38.9% of them experienced PLP at 1 year post-amputation (11.1% of the MT group and 66.7% of the non-MT group). The MT group and non-MT groups experienced PLP for a mean (± SD) of 246 (± 200) days, and 541 (± 363) days, respectively (p=0.08). The mean (SD) opioid doses (mg/kg/day) in the MT and non-MT groups were 0.81 (± 0.99) and 0.33 (± 0.31), respectively; the mean (SD) gabapentin doses (mg/kg/day) were 40.1 (± 21) for the MT group and 30.5 (± 11.5) for the non-MT group., Conclusion: MT in children with cancer-related amputations is associated with lower incidence of PLP at 1 year and shorter duration of PLP., Competing Interests: The authors have no conflicts of interest to disclose.