Prenatal Fetal Neurocutaneous Melanosis: A Case Report and Literature Review

We reported a rare case of prenatal NCM, but no known pathogenic mutations, such as NRAS gene mutations, were found. This confirmed that there might be no definite pathogenic mutations in the NCM case, providing important data support for the prenatal identification and diagnosis of NCM. We reported a rare case of prenatal NCM, but no known pathogenic mutations, such as NARS gene mutations, were found. This confirmed that there might be no definite pathogenic mutations in the NCM case, providing important data support for the prenatal identification and diagnosis of NCM.