[Clinical characteristics and genetic analysis of two children with Familial glucocorticoid deficiency type 1 due to variants of MC2R gene].

To improve the recognition of Familial glucocorticoid deficiency type 1 (FGD1) due to variants of melanocortin 2 receptor (MC2R) gene. Two children with FGD1 diagnosed at the Henan Children's Hospital respectively in 2019 and 2021 were selected as the study subjects. Clinical data, treatment, follow-up and results of genetic testing were collected and retrospectively analyzed. Whole exome sequencing revealed that both children had harbored compound heterozygous variants of the MC2R gene, including c.433C>T (p.R145C) and c.710T>C (p.L237P) in child 1, and c.145delG (p.V49Cfs*35) and c.307G>A (p.D103N) in child 2, among which c.710T>C (p.L237P) and c.145delG (p.V49Cfs*35) were unreported previously. FGD1 is clinically rare, and genetic sequencing is crucial for the definite diagnosis. Discovery of the and novel variants has enriched the mutational spectrum of the FGD1 gene.