WordNet

the physical condition of blocking or filling a passage with an obstruction (同)blockage
any structure that makes progress difficult (同)obstructor, obstructer, impediment, impedimenta
getting in someones way
the act of obstructing; "obstruction of justice"
present at birth but not necessarily hereditary; acquired during fetal development (同)inborn, innate
a conduit that resembles a bridge but carries water over a valley

PrepTutorEJDIC

《所有・所属》…『の』,…のものである,…に属する・《材料・要素》…『でできた』,から成る・《部分》…『の』[『中の』] ・《数量・単位・種類を表す名詞に付いて》…の・《原因・動機》…『で』,のために(because of) ・《主格関係》…『の』,による,によって・《目的格関係》…『を』,の・《同格関係》…『という』・《関係・関連》…『についての』[『の』],の点で・《抽象名詞などと共に》…の[性質をもつ] ・《『It is』+『形』+『of』+『名』+『to』 doの形で,ofの後の名詞を意味上の主語として》・《分離》…『から』・《起原・出所》…『から』[『の』](out of) ・《『名』+『of』+『a』(『an』)+『名』の形で》…のような・《『名』+『of』+『mine』(『yours, his』など独立所有格)の形で》…の…・《時》(1)《副詞句を作って》…に《形容詞句を作って》…の・《時刻》《米》…前(to,《米》before)
〈U〉(…への)妨害,障害《+『to』+『名』》 / 〈C〉(…への)妨害物,障害物《+『to』+『名』》
(病気・身体的欠陥など)生まれつきの,先天的な
送水路,水路橋

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1. 水頭症 hydrocephalus
2. 小児における核上性注視異常 supranuclear disorders of gaze in children
3. ネコ引っかき病の微生物学、疫学、臨床症状、および診断 microbiology epidemiology clinical manifestations and diagnosis of cat scratch disease
4. 小児における第6脳神経（外転神経）麻痺 sixth cranial nerve abducens nerve palsy in children
5. 後方循環系の脳血管症候群 posterior circulation cerebrovascular syndromes

Feng X1, Papadopoulos MC, Liu J, Li L, Zhang D, Zhang H, Verkman AS, Ma T.
Journal of neuroscience research.J Neurosci Res.2009 Apr;87(5):1150-5. doi: 10.1002/jnr.21927.
Aquaporin-4 (Aqp4) is a water transport protein expressed in glia and ependymocytes in brain. We report here the unexpected occurrence of severe obstructive hydrocephalus in a random subset of Aqp4 knockout mice. Of 612 Aqp4 knockout mice produced by heterozygote-heterozygote or knockout-knockout br
PMID 18951529

Coexistent intraventricular abnormalities in periventricular giant arachnoid cysts.

Rangel-Castilla L1, Torres-Corzo J, Vecchia RR, Mohanty A, Nauta HJ.
Journal of neurosurgery. Pediatrics.J Neurosurg Pediatr.2009 Mar;3(3):225-31. doi: 10.3171/2008.11.PEDS08106.
OBJECT: Arachnoid cysts are congenital lesions that arise during development by splitting of the arachnoid membrane. Large cysts can be adjacent to CSF pathways causing a marked midline shift and hydrocephalus. The association between a large arachnoid cyst and hydrocephalus has been commonly descri
PMID 19338470

Endoscopic third ventriculostomy for obstructive hydrocephalus in children younger than 6 months of age: is it a first-choice method?

Lipina R1, Reguli S, Dolezilová V, Kuncíková M, Podesvová H.
Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery.Childs Nerv Syst.2008 Sep;24(9):1021-7. doi: 10.1007/s00381-008-0616-6. Epub 2008 Mar 15.
INTRODUCTION: Endoscopic third ventriculostomy (ETV) is considered a safe procedure and is a method of choice in treatment of obstructive hydrocephalus nowadays. In case of Sylvian aqueduct stenosis, the success rate reaches 90%. In children younger than 6 to 24 months, respectively, however, some a
PMID 18343929