Marcus Gunn Syndrome in Primary Care: A Case Report.

Marcus Gunn syndrome (MGS) is a rare craniofacial condition characterized by abnormal eyelid movements synchronized with jaw muscle activity. This case report describes a one-month-old girl with right eyelid ptosis and involuntary movements of the right eyelid during sucking. The diagnosis of MGS was made based on clinical observations. The etiology of MGS is not well-defined, and long-term follow-up is necessary to assess the progression of the condition. Early referral to ophthalmologists and neurologists/pediatricians is important to evaluate concomitant conditions and prevent secondary complications. Primary care physicians, who maintain continuous contact with patients, play a crucial role in detecting initial symptoms, initiating appropriate investigations, and coordinating multidisciplinary care. By raising awareness among primary care physicians about the signs, symptoms, and referral pathways for MGS, this case report aims to improve the recognition and management of this rare condition in primary care settings. Emphasizing the role of family doctors in the early identification and referral of MGS can lead to better outcomes for affected patients.