Neonatal diagnosis of Marcus Gunn jaw winking syndrome
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This report highlights the importance for neonatologists/pediatricians of considering Marcus Gunn jaw winking syndrome among differential diagnosis of ptosis.

This male newborn was delivered at 39 weeks gestational age by Cesarean section. At delivery, the Apgar score was 8 at 1 minute and 10 at 5 minutes of life. Birth anthropometry taken was as follows: weight 3560 gr, length 51 cm, and head circumference 33 cm.

At the initial full clinical examination performed soon after birth, left eye ptosis was observed without evidence of edema. Namely, the newborn was hardly able to lift his left eyelid, whose opening was below the upper eyelid margin. Pupils were bilaterally isochoric, isocyclic, and reactive to light. Newborn's general appearance and clinical conditions were otherwise normal.

At 3 days of life, a first ophthalmologist evaluation was performed, and possible congenital ptosis was suspected. The newborn was discharged at 4 days of life in good clinical conditions, with a follow-up program of the ptosis.

Thus, a detailed and prolonged clinical assessment plays a pivotal role in allowing a prompt diagnosis, so that this disorder can be explained to parents avoiding apprehension. Of importance, a prompt diagnosis helps in preventing the development of adaptive phenomena and ophthalmic disorders and allows to establish the appropriate management.

Source: https://onlinelibrary.wiley.com/doi/full/10.1002/ccr3.3664?af=R
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