Cranial computed tomography findings in a 19‐year‐old man with hyperammonemia due to ornithine transcarbamylase deficiency. A, On day 1 of hospitalization, the corticomedullary junction was clear, but the brain was slightly edematous. B, C, On day 3, cranial computed tomography findings were remarkable with unclear corticomedullary junction, generalized brain edema, and cerebral herniation (arrow).