Introduction:

Asymmetrical facies during crying (AFC) is a mild congenital anomaly characterized by asymmetry in lip movement during crying in a newborn whose face remains symmetrical at rest. It may be related to hypoplasia of the depressor anguli oris muscle (DAOM) or peripheral paralysis.

Case Description:

We present the case of a newborn with asymmetrical facies during crying, without other evident structural abnormalities, with a favorable clinical course and no functional impairment.

Discussion:

This report highlights the importance of the neonatal physical examination and the need for a rational diagnostic approach that allows for the exclusion of syndromic associations, avoiding unnecessary studies in isolated cases.

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