Abstract
Cockayne syndrome is an uncommon autosomal recessive disease characterized by microcephaly, abnormal growth, and pathologic premature aging. The purpose of this report is to evaluate liver failure in children with Cockayne syndrome following metronidazole administration. The first case was a 2-year-old boy with Cockayne syndrome. He had been treated with metronidazole for gastroenteritis. 48 hours after treatment initiation, he was hospitalized due to jaundice, intractable vomiting, and agitation. Unfortunately, he died of acute liver failure. The second case was a 5-year-old boy with Cockayne syndrome as well, who had been treated with amoxicillin and metronidazole for a dental infection. He developed jaundice, drowsiness, lethargy, and anorexia after treatment. At hospital, the child received supportive treatment, and his general condition gradually improved. The liver enzyme levels decreased. He was finally discharged in good general condition. The mortality after metronidazole consumption in patients with Cockayne syndrome due to liver failure is very high. The awareness of the dangers of using metronidazole in these patients is valuable.