title: [Two familial cases of optic nerve hypoplasia including superior segmental optic hypoplasia].
abstract: OBJECTIVE
  To report two familial cases of optic nerve hypoplasia including superior segmental optic hypoplasia (SSOH).
  
  
  METHODS
  In Family 1, case 1 and case 2 were sisters. In Family 2, case 3 was the mother of case 4 and the younger sister of case 5. The cases in Family 1 had SSOH in one eye, whereas Family 2 showed various patterns of SSOH, as well as nasal optic nerve hypoplasia, and a wide range of optic nerve hypoplasia. Case 1 and case 3 were diagnosed as normal tension glaucoma and treated with eye drops at a previous hospital. None of the cases had any systemic illness. The father of cases 1 and 2, and the father of Cases 3 and 5 were under treatment for type 2 diabetes mellitus.
  
  
  CONCLUSIONS
  In this study, SSOH seemed to be prevalent among family members. In addition, as the cases in Family 2 illustrate, hypoplasia of the optic nerve showed various patterns in the superior segment, nasal segment, and over a wide range of the optic nerve. Therefore SSOH was just one part of the overall optic nerve hypoplasia.
authors.affiliation: Department of Ophthalmology, Fukuiken Saiseikai Hospital, Japan. shohei0922@yahoo.co.jp
authors.forename: Shohei
authors.initials: S
authors.lastname: Takata
authors.forename: Koji
authors.initials: K
authors.lastname: Nitta
authors.forename: Toshiro
authors.initials: T
authors.lastname: Tanahashi
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Sugiyama
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009421:Nervous System Malformations / Q000235:genetics; D009900:Optic Nerve / Q000002:abnormalities*