Congenital double lower lip in a newborn with feeding difficulties.
Irene Fernández-Bueno, Mireya Fernández-Pérez, Irene Saura-Pérez et al.
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Case in brief
A full-term male newborn was admitted on his first day of life with feeding difficulties and hypoglycemia. Examination showed a protruding, bifid mass along the lower-lip mucosa that interfered with breastfeeding, consistent with congenital double lip, a mucosal hyperplasia that more often affects the upper lip. Feeding difficulties resolved with conservative management, without surgery. The infant gained weight adequately and had no further breastfeeding problems at follow-up through 3 months of age; follow-up was then lost.
What made this case unusual
The congenital double lip involved the lower lip and interfered with breastfeeding, whereas the condition most commonly affects the upper lip.
Diagnostic / clinical pearl
A bifid mucosal mass of the lower lip in a newborn with feeding difficulty may represent congenital double lip; in this case, symptoms resolved without surgical removal.