title: Absent trochlear nerve with contralateral superior oblique underaction.
authors.affiliation: Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 166, Gumiro, Bundang-gu, Seongnam, Gyeonggi-do, 463-707, South Korea.
authors.forename: Hee Kyung
authors.initials: HK
authors.lastname: Yang
authors.forename: Jae Hyoung
authors.initials: JH
authors.lastname: Kim
authors.forename: Jeong-Min
authors.initials: JM
authors.lastname: Hwang
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D009801:Oculomotor Muscles / Q000294:innervation / Q000473:pathology*; D013285:Strabismus / Q000175:diagnosis*; D014321:Trochlear Nerve / Q000002:abnormalities*; D020432:Trochlear Nerve Diseases / Q000151:congenital* / Q000175:diagnosis; D000093922:Congenital Cranial Dysinnervation Disorders