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Duane syndrome in association with congenital disorder of glycosylation type Ig (ALG12-CDG)

Congenital disorders of glycosylation type I (CDG-I) are a group of autosomal recessive genetic multisystem disorders that arise from defective glycoprotein biosynthesis. Although ocular abnormalities have been described in patients with CDG-I, few ocular abnormalities have been associated with ALG12-CDG (CDG-Ig), a rare subtype of CDG-I. We report a case of Duane syndrome, a congenital strabismus syndrome, in a 17-year-old young woman with ALG12-CDG.