WordNet

coming next after the third and just before the fifth in position or time or degree or magnitude; "the quaternary period of geologic time extends from the end of the tertiary period to the present" (同)4th, quaternary
following the third position; number four in a countable series
the musical interval between one note and another four notes away from it
a chamber of the heart that receives blood from an atrium and pumps it to the arteries (同)heart_ventricle
one of four connected cavities in the brain; is continuous with the central canal of the spinal cord and contains cerebrospinal fluid
being one more than three (同)4, iv
the cardinal number that is the sum of three and one (同)4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe
an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent

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)
《the fourth》『第4の』,4番目の / 4分の1の / {U}《通例the fourth》『第4番目』;(月の)4日 / 〈C〉4分の1 / 〈C〉(音楽で)4度
(脳髄・喉頭などの)室,空洞,(心臓の)心室
〈C〉(数の)4;4ノ記号(4,IVなど) / 〈U〉4時,4分;4歳 / 〈U〉《複数扱い》4人,4個 / 〈C〉4個(4人)1組のもの;フォア(4本オールのボートおよびその選手) / 〈C〉(カードの)4の札 / 4の;4人の;4個の / 《補語にのみ用いて》4歳の(で)

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1. まれな脳腫瘍 uncommon brain tumors
2. 神経膠腫の分類 classification of gliomas
3. 消化管閉鎖症および閉塞の出生前診断 prenatal diagnosis of gastrointestinal atresia and obstruction
4. 腸管閉鎖症 intestinal atresia
5. 胆道閉鎖症 biliary atresia

English Journal

Trigeminal neuralgia due to Dandy-Walker syndrome.

Zhang W1, Chen M, Zhang W.
The Journal of craniofacial surgery.J Craniofac Surg.2013 Jul;24(4):1457-9. doi: 10.1097/SCS.0b013e31828f2ef2.
Trigeminal neuralgia (TN) is a common pain in the orofacial region. Dandy-Walker syndrome (DWS) is a congenital malformation of the cerebellar and the fourth ventricle foramina atresia. Dandy-Walker syndrome is rarely found in patients with TN. This article presents a 36-year-old man with the sympto
PMID 23851831

Third ventriculostomy and fourth ventricle outlets obstruction.

Ferrer E1, de Notaris M.
World neurosurgery.World Neurosurg.2013 Feb;79(2 Suppl):S20.e9-13. doi: 10.1016/j.wneu.2012.02.017. Epub 2012 Feb 10.
A dilated fourth ventricle due to outlet obstruction is a clinical-radiologic entity with symptoms similar to those of a posterior fossa space-occupying lesion. Indeed, blockage of the foramina of Luschka and Magendie and of the aqueduct results in a "trapped" fourth ventricle. Continued cerebrospin
PMID 22381846

Fourth ventriculostomy: an alternative treatment for hydrocephalus due to atresia of the Magendie and Luschka foramina.

Giannetti AV1, Malheiros JA, da Silva MC.
Journal of neurosurgery. Pediatrics.J Neurosurg Pediatr.2011 Feb;7(2):152-6. doi: 10.3171/2010.11.PEDS1080.
Atresia of the foramina of Magendie and Luschka is a rare cause of obstructive hydrocephalus. Although this condition has been classically treated by CSF shunting, recent treatments have also included endoscopic third ventriculostomy. In the present study, the authors present the case of a patient w
PMID 21284460