RT Journal Article SR Electronic T1 Lymphatic malformation with acquired Horner syndrome in an infant JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP e2 OP e2 DO 10.1136/neurintsurg-2017-013315.rep VO 10 IS 3 A1 Birgit Spors A1 Joerg Seemann A1 Natalie Homer A1 Aaron Fay YR 2018 UL http://jnis.bmj.com/content/10/3/e2.abstract AB An infant presented with right upper eyelid ptosis and was subsequently diagnosed with acquired Horner syndrome. Further evaluation revealed a right-sided cervicothoracic lymphatic malformation. At 13 weeks of age, the child underwent percutaneous intracystic sclerotherapy with a mixture of sodium tetradecyl sulphate and ethanol. Twenty-one weeks after initial treatment, ophthalmic examination showed complete resolution of the blepharoptosis and pupillary miosis. Percutaneous sclerotherapy not only effectively treated the space-occupying lymphatic malformation but also reversed the Horner syndrome that was presumably induced by neural tension (more likely) or compression.