case_images: PMC5952495_01
case_images: PMC5952495_02
case_images: This is an arterial blood sample obtained shortly after admission. It was noted to be significantly darker than expected. Cooximetry was obtained and the methemoglobinemia level was reported as greater than 25%.
case_images: CRICC2018-1903787.001.jpg
case_images: PMC5952495_02_CRICC2018-1903787.001.jpg
case_images: fig1
case_images: The child was persistently hypoxemic after intubation despite receiving 100% fraction of inspired oxygen on the ventilator, so an arterial blood gas was obtained and the blood was noted to be dark chocolate colored in appearance (Figure 1).
case_images: This is a copy of the infant's growth chart. The infant was admitted to the PICU and was 3.77 kilograms (kg), which was below his birth weight and at the 6th percentile for age. He was discharged weighing 4.09 kg and at posthospitalization follow-up (6 weeks from discharge) he was 5.95 kg, approximately the 52nd percentile for age.
case_images: CRICC2018-1903787.002.jpg
case_images: PMC5952495_02_CRICC2018-1903787.002.jpg
case_images: fig2
case_images: At the time of his follow-up, roughly 8 weeks after discharge, he was continuing to do well on Elecare and had not had recurrence of his symptoms, and his weight had returned to the 52nd percentile up from the 6th percentile at his initial presentation (Figure 2).