Review Question - QID 108596

A 10-month-old infant is brought in by his mother for evaluation of a persistent itchy rash. His mother first noticed the rash 6 months prior and has been using topical triamcinolone ointment and emollients with some improvement in his symptoms. He was born at 41 weeks gestation in an otherwise uneventful pregnancy. His past medical history is significant for two episodes of acute otitis media and one episode of sinusitis which resolved after brief courses of antibiotics. Physical exam is notable for scaly, pink plaques of the perioral area and the extensor surfaces as well as Figure A.

A peripheral smear shows normal sized red blood cells with neutrophils, monocytes, rare eosinophils, and small platelets. His laboratory test results are shown below:

Serum:
Na+: 140 mEq/L
K+: 4.3 mEq/L
HCO3-: 20 mEq/L
CL-: 102 mEq/L
BUN: 18 mg/dL
Creatinine: 0.9 mg/dL
Glucose: 98 mg/dL

Leukocyte count: 5,900/mm^3
Hemoglobin: 13.1 g/dL
Platelet count: 34,000/mm^3

MCV: 89 fL (normal 80-96 fL)
RDW: 12.0% (normal 11.5-14.5%)
MCHC: 34.1 g/dL (normal 33-36 g/dL)
Reticulocytes: 1.0% (normal 0.5-1.5%)

A treatment is given that prevents future occurrences of the disease. Which of the following side effects is most likely to result from the treatment that was prescribed?