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a structure resembling a bag in an animal

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小袋,のう(動植物の内部にあり,特に液を含んだもの)

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/04/10 12:46:07」(JST)

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From the posterior wall of the saccule a canal, the ductus endolymphaticus, is given off; this duct is joined by the ductus utriculosaccularis, and then passes along the aquaeductus vestibuli and ends in a blind pouch, the endolymphatic sac, on the posterior surface of the petrous portion of the temporal bone, where it is in contact with the dura mater. Studies suggest that the endolymphatic duct and endolymphatic sac perform both absorptive and secretory,^[1]^[2]^[3]^[4] as well as phagocytic ^[5] and immunodefensive,functions.^[6]

Neoplasms of the Endolymphatic sac are very rare tumors.

References

^ Schuknecht HF. Pathology of the Ear. Philadelphia, Pa: Lea & Febiger; 1993:45–47, 50–51, 62, 64, 101
^ Wackym PA, Friberg U, Bagger-Sjo¨ba¨ck D, Linthicum FH Jr,Friedmann I, Rask-Andersen H. Human endolymphatic sac: possible mechanisms of pressure regulation. J Laryngol Otol 1987; 101:768–779
^ Yeo SW, Gottschlich S, Harris JP, Keithley EM. Antigen diffusion from the perilymphatic space of the cochlea. Laryngoscope 1995; 105:623–628
^ Rask-Andersen H, Danckwardt-Lilliestrom N, Linthicum FH, House WF. Ultrastructural evidence of a merocrine secretion in the human endolymphatic sac. Ann Otol Rhinol Laryngol 1991; 100:148–156
^ Fukuzawa K, Sakagami M, Matsunaga T, Fujita H. Endocytotic activity of the free floating cells and epithelial cells in the endolymphatic sac: an electron microscopic study. Anat Rec 1991; 230:425–433
^ Wackym PA, Friberg U, Linthicum FH Jr, et al. Human endolymphatic sac: morphologic evidence of immunologic function. Ann Otol Rhinol Laryngol 1987;96:276–282

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1. フォンヒッペル・リンダウ病の臨床的特徴、診断、およびマネージメント clinical features diagnosis and management of von hippel lindau disease
2. メニエール病 meniere disease
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5. 妊娠期間および出産予定日の出生前評価 prenatal assessment of gestational age and estimated date of delivery

English Journal

Nasoseptal cholesterol granuloma: a case report and review of pathogenesis.

Kuperan AB, Gaffey MM, Langer PD, Mirani NM, Liu JK, Eloy JA.SourceDepartment of Otolaryngology-Head and Neck Surgery, University of Medicine and Dentistry of New Jersey, 90 Bergen St, Ste 8100, Newark, NJ 07103. jean.anderson.eloy@gmail.com.
Archives of otolaryngology--head & neck surgery.Arch Otolaryngol Head Neck Surg.2012 Jan;138(1):83-6.
Cholesterol granulomas are rare inflammatory deposits that can be located corporally, but are classically found in the petrous apex and other pneumatized areas of the temporal bone. Originally thought to be a response to hypoventilation due to mucosal swelling and occlusion of air cells, the pathoge
PMID 22249636

Re: "Histopathology after endolymphatic sac surgery for Ménière's syndrome".

Michaels L, Soucek S.
Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology.Otol Neurotol.2012 Jan;33(1):96.
PMID 22143293

Japanese Journal

メニエール病および遅発性内リンパ水腫に対する内リンパ嚢開放術の長期成績

二木隆
耳鼻咽喉科臨床 105(3), 203-209, 2012-03-01
NAID 10030176536

耳科手術後の感音難聴予防に対する抗ヒスタミン薬投与効果

鎌倉武史,北原糺,土井勝美,猪原秀典
耳鼻咽喉科臨床 103(11), 997-1001, 2010-11-01
… A 36-year-old man who had undergone endolymphatic sac surgery suffered from sensorineural hearing loss in the same ear after breathing strongly through his nose and hearing a “pop”. …
NAID 10027449382