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A 7-year-old Caucasian boy is brought to your clinic with a 2-day complaint of fatigue and easy bruising. The patient has been healthy up until this point, except for a cold 1 week before. On physical exam, the patient has the following appearance seen in Figure A. A complete blood count is performed and reveals the following significant values: WBC 7,000/mm^3, Hgb 8.0 g/dL, and PLT 200,000/mm^3. Further workup via hemoglobin electrophoresis reveals absent levels of HgS and normal levels of HgA2. Which of the following comorbidities is most likely in this patient?
Vitamin D deficiency
Sickle cell disease
Human immunodeficiency virus (HIV) infection
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A 7-year-old boy is brought in by his mother after he developed a rash, shown in Figure A. On interview, you learn that four days ago your patient had a fever of 100F, headache, coryza, and diarrhea. Besides the rash, the patient has no other complaints. It is recorded that his vaccinations are up-to-date. With regards to the rash, which of the following is the best treatment?
Reassure parent that the rash is self-limiting
Red blood cell transfusion
Monoclonal antibody against tumor necrosis factor-alpha
Guanosine analog that leads to viral DNA polymerase inhibition
Vitamin A administration