I would like opinions on how to approach an infant born with orbicularis oris atrophy. This particular case is now three months old and the deviation of the corner of the mouth remains unchanged. I doubt the possibility I am dealing with facial palsy as the findings are totally localized in the area defined. Eyelids, tongue, etc. appear to move normally. Any suggested workup and differential diagnoses is appreciated. Needless to say the birth history is totally benign. Gonzalo Mantilla Jr., MD. Oficina del Decano USFQ Colegio de Ciencias de la Salud