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A 19-month-old girl with a history of asthma and atopic dermatitis presented to her pediatrician because of parental concerns of pallor and fatigue. On dietary history, it was discovered that she was a picky eater and consumed 26 oz of homogenous milk daily. Her physical examination was unremarkable aside from pallor, and both her height and weight plotted between the 50th and 75th percentile for age. Therefore, she was investigated for iron deficiency anemia and indeed her blood work was consistent. Despite appropriate iron supplementation and dietary milk restriction, there was no improvement in her hemoglobin or iron studies. Our expert panel examines the case and offers a differential diagnosis for a child presenting with treatment-resistant iron deficiency anemia., Competing Interests: POTENTIAL CONFLICT OF INTEREST: The authors have indicated they have no potential conflicts of interest to disclose., (Copyright © 2018 by the American Academy of Pediatrics.)

Background and Objective: Vaso-occlusive episodes (VOEs) are the most common complication of sickle cell disease in children. Treatment with magnesium seems to improve cellular hydration and may result in reduced vaso-occlusion. This study aimed to determine if intravenous (IV) magnesium sulfate (MgSO4) reduces length of stay (LOS) in hospital, pain scores, and cumulative analgesia when compared with placebo., Methods: Randomized, double-blind, placebo-controlled trial in children aged 4 to 18 years requiring admission to hospital with a sickle cell disease VOE requiring IV analgesia. Participating children received IV MgSO4 (100 mg/kg) every 8 hours or placebo in addition to standard therapy. We used a t test or Mann-Whitney test (continuous variables), Fisher's exact test, or χ2 test (frequencies). P values were considered significant if <.05, and 95% confidence intervals were calculated for the difference between groups., Results: One hundred six children were randomly assigned to the study, and 104 were included. Fifty-one (49%) received MgSO4. Children's mean age was 12.4 years (range: 4-18 years; SD: 3.8 years), and 56 (54%) were females. There was no significant difference in the primary outcome measure, LOS in hospital, with a mean of 132.6 and 117.7 hours in the MgSO4 and placebo groups, respectively (P = .41). There was no significant difference between groups for the secondary outcomes of mean pain scores (4.9 ± 2.6 vs 4.8 ± 2.6, respectively; P = .92) or analgesic requirements (continuous morphine infusion [P = .928], boluses of IV morphine [P = .82], acetaminophen [P = .34], ibuprofen [P = .15], naproxen [P = .10]). Only minor adverse events were recorded in both groups. Pain at the infusion site was more common in the MgSO4 group., Conclusions: IV MgSO4 was well tolerated but had no effect on the LOS in hospital, pain scores, or cumulative analgesia use in admitted children with a VOE.

Objectives: Our goal was to determine long-term efficacy and safety of B-cell-depletion therapy for children with autoimmune thrombocytopenia and autoimmune hemolytic anemia in pediatric systemic lupus erythematosus., Patients and Methods: A retrospective, single-center cohort study was conducted including all patients with pediatric systemic lupus erythematosus who were diagnosed with autoimmune thrombocytopenia and/or autoimmune hemolytic anemia and treated with rituximab. Treatment efficacy and safety parameters were monitored and recorded., Results: Nine patients with pediatric systemic lupus erythematosus were included in the study: 5 had autoimmune thrombocytopenia, 3 had autoimmune hemolytic anemia, and 1 had both. There were 5 female and 4 male patients; median age at diagnosis of pediatric systemic lupus erythematosus was 14 years (range: 8-16 years); and median pediatric systemic lupus erythematosus disease duration to time of rituximab treatment was 6 months (range: 2-30 months). Complete response was achieved in all 6 children with autoimmune thrombocytopenia (median time to complete response: 2 weeks [range: 1-12 weeks]). Two patients' conditions flared at 48 and 68 weeks, respectively, and were re-treated. The remaining 4 patients continued to be in remission at 24, 32, 36, and 88 weeks, respectively. All 4 children with autoimmune hemolytic anemia achieved complete response at a median time of 4 weeks (range: 4-32 weeks). All patients remained in complete response at 24, 44, 84, and 100 weeks of follow-up. Complete B-cell depletion was seen in all children after rituximab treatment. No serious infections occurred, but 1 patient had an infusion reaction., Conclusions: Preliminary evidence suggests that B-cell-depletion therapy with rituximab is an efficacious and safe treatment for autoimmune thrombocytopenia and autoimmune hemolytic anemia in pediatric systemic lupus erythematosus. Despite the prolonged effect on B-cell numbers and function, no serious infections were observed.