title: Lobar holoprosencephaly in a Miniature Schnauzer with hypodipsic hypernatremia.
abstract: A 9-month-old male Miniature Schnauzer was examined because of a lifelong history of behavioral abnormalities, including hypodipsia. Diagnostic evaluation revealed marked hypernatremia and a single forebrain ventricle. The behavioral abnormalities did not resolve with correction of the hypernatremia, and the dog was euthanatized. At necropsy, midline forebrain structures were absent or reduced in size, and normally paired forebrain structures were incompletely separated. Findings were diagnostic for holoprosencephaly, a potentially genetic disorder and the likely cause of the hypodipsia. Similar evaluation of affected Miniature Schnauzer dogs may reveal whether holoprosencephaly routinely underlies the thirst deficiency that may be seen in dogs of this breed.
authors.affiliation: Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.
authors.forename: Stacey A
authors.initials: SA
authors.lastname: Sullivan
authors.forename: Barry G
authors.initials: BG
authors.lastname: Harmon
authors.forename: P Thomas
authors.initials: PT
authors.lastname: Purinton
authors.forename: Craig E
authors.initials: CE
authors.lastname: Greene
authors.forename: Leigh E
authors.initials: LE
authors.lastname: Glerum
mesh_terms: D000818:Animals; D003681:Dehydration / Q000209:etiology / Q000662:veterinary; D004283:Dog Diseases / Q000209:etiology / Q000235:genetics* / Q000473:pathology; D004285:Dogs; D037901:Euthanasia, Animal; D016142:Holoprosencephaly / Q000150:complications / Q000235:genetics / Q000473:pathology / Q000662:veterinary*; D006955:Hypernatremia / Q000209:etiology / Q000662:veterinary*; D008297:Male; D013894:Thirst