WordNet

a network of intersecting blood vessels or intersecting nerves or intersecting lymph vessels (同)rete
a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye (同)choroid coat
a benign epithelial tumor forming a rounded mass (同)villoma, papillary_tumor, papillary tumour

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(神経・血管などの)網状組織

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/02/05 16:02:31」(JST)

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A Choroid plexus papilloma (CPP) is a rare, slow-growing, histologically benign intracranial neoplasm or tumor that is commonly located in the ventricular system of the choroid plexus.^[1] It leads to increased cerebrospinal fluid production, thus causing increased intracranial pressure and hydrocephalus.^[2]

Pathophysiology[edit]

The tumor is neuroectodermal in origin and similar in structure to a normal choroid plexus. They may be created by epithelial cells of the choroid plexus.

Frequency and age affected[edit]

Internationally tumors of the choroid plexus are rare, accounting for 0.4-0.6% of all intracranial neoplasms. It most commonly affects young children under the age of 5 with a mean patient age of 5.2 years.

Signs and symptoms[edit]

Signs of the tumor resulting from increased intracranial pressure are present in 91% of patients, with vomiting, homonymous visual field defects and headache being the most common symptoms.

Surgical treatment[edit]

Choroid plexus papillomas are benign tumors that are usually cured by surgery; malignant progression has been rarely reported.

Additional images[edit]

Micrograph of a choroid plexus papilloma. H&E stain.

References[edit]

^ McEvoy AW, Harding BN, Phipps KP, et al. (April 2000). "Management of choroid plexus tumours in children: 20 years experience at a single neurosurgical centre". Pediatr Neurosurg 32 (4): 192–9. doi:10.1159/000028933. PMID 10940770.
^ Oliver Adunka; Craig Buchman (11 October 2010). Otology, Neurotology, and Lateral Skull Base Surgery: An Illustrated Handbook. Thieme. pp. 353–. ISBN 978-3-13-149621-8. Retrieved 12 August 2013.

External links[edit]

Choroid Plexus Papilloma MRI, CT, and pathology images from MedPix

UpToDate Contents

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1. まれな脳腫瘍 uncommon brain tumors
2. 水頭症 hydrocephalus
3. 乳頭浮腫の概要および鑑別診断 overview and differential diagnosis of papilledema
4. 特発性頭蓋内圧亢進症（偽脳腫瘍）：臨床的特徴および診断 idiopathic intracranial hypertension pseudotumor cerebri clinical features and diagnosis
5. Bacterial meningitis in the neonate: Clinical features and diagnosis

English Journal

Atypical Choroid Plexus Papilloma in a Newborn: Prenatal Diagnosis, Preoperative Tumor Embolization, and Resection.

Ditz C, Nowak G, Koch C, Merz H, Tronnier V.SourceUK-SH Campus Lübeck, Neurosurgery, Lübeck, Germany.
Journal of neurological surgery. Part A, Central European neurosurgery.J Neurol Surg A Cent Eur Neurosurg.2012 Aug 1. [Epub ahead of print]
PMID 21830192

Giant Congenital Melanocytic Nevus with Choroid Plexus Papilloma: Case Report and Review of Literature.

Dua R, Jain R, Momin M.SourceUniversity College of Medical Sciences and G.T.B Hospital, Department of Neurosurgery, New Delhi, India.
Journal of neurological surgery. Part A, Central European neurosurgery.J Neurol Surg A Cent Eur Neurosurg.2012 Aug 1. [Epub ahead of print]
PMID 21344363

Japanese Journal

第四脳室と橋・延髄の解剖と外科治療(<特集>脳室・脳幹病変の外科治療)

斉藤延人,金太一
脳神経外科ジャーナル 20(6), 438-445, 2011-06-20
第四脳室と橋・延髄下半分の病変には,髄芽腫,脳室上衣腫,星細胞腫,脈絡叢乳頭腫,脳幹海綿状血管腫,血管芽腫,外向発育性グリオーマなどがある.第四脳室を露出するには小脳延髄裂アプローチが有用である.小脳扁桃の裏で延髄に付着している脈絡膜と脈絡紐を切開して小脳扁桃を牽引する方法である.脳幹内部へは,病変が最も表面に近い部分から進入するのが基本である.第四脳室底には正中溝,閂,第四脳室線条,外側陥凹,顔 …
NAID 110008662231

Hydrocephalus Due to Diffuse Villous Hyperplasia of the Choroid Plexus : Case Report

ANEI Ryogo,HAYASHI Yoshimitsu,HIROSHIMA Satoru,MITSUI Nobuyuki,ORIMOTO Ryosuke,UEMORI Genki,SAITO Masato,SATO Masao,WADA Hajime,HODODUKA Akira,KAMADA Kyousuke
Neurologia medico-chirurgica = 神経外科 51(6), 437-441, 2011-06-15
… An 8-month-old female presented with hydrocephalus caused by cerebrospinal fluid (CSF) overproduction due to bilateral choroid plexus enlargement, which was clinically diagnosed as diffuse villous hyperplasia of the choroid plexus, but differentiation from bilateral choroid plexus papilloma was difficult. …
NAID 10029138205

Related Pictures

★リンクテーブル★

リンク元	「脳腫瘍」「神経膠腫」「脈絡叢乳頭腫」
関連記事	「plexus」「plexuses」

「脳腫瘍」

Choroid plexus papilloma
	Classification and external resources
ICD-10	C71.5
ICD-9	191.5
ICD-O:	M9390/1
eMedicine	article/250795 radio/171
MeSH	D020288

　　[★]

英: brain tumor, cerebral tumor
同: 脳新生物 brain neoplasm
関: 頭蓋内腫瘍

概念

分類

原発性脳腫瘍

神経膠腫 glioma

星状細胞腫 astrocytoma

胚腫 germinoma

転移性脳腫瘍

疫学

発生率：10万人対10-15人。罹患率：10万人対46人　→

腫瘍別発生頻度

腫瘍別発生頻度		小児	成人
神経膠腫	33%	星状細胞腫	髄膜腫
髄膜腫	22%	髄芽腫	膠芽腫
下垂体腺腫	15%	頭蓋咽頭腫	下垂体腺腫
神経鞘腫	9%	胚細胞腫	神経鞘腫
頭蓋咽頭腫	5%	上衣腫	転移性脳腫瘍

YN.J.188

部位	種類	小児	成人
頭蓋骨	頭蓋骨腫瘍	○	○
大脳半球	神経膠腫		○
大脳半球	髄膜腫		○
松果体	胚細胞腫	○
小脳半球	星細胞腫	○
小脳半球	血管芽腫		○
小脳虫部	髄芽腫	○
第四脳室	上衣腫	○
鞍上部・視交叉部・下垂体部	頭蓋咽頭腫	○
	視神経膠腫	○
	胚細胞腫	○
	下垂体腺腫		○
	髄膜腫		○
小脳橋角部	聴神経鞘腫		○
脳幹部	神経膠腫	○	○

小児の脳腫瘍

SCN.173

腫瘍：星細胞腫、髄芽腫、頭蓋咽頭腫、胚細胞腫、上衣腫の順に多い。
部位：1歳まではテント上、2-7歳まではテント下、8-15歳まではテント上に多い。

SRA.163

	後発年齢	好発部位
小脳星細胞腫	5～10歳	小脳半球
髄芽腫	5～10歳(男児に多い)	小脳虫部から発生
頭蓋咽頭腫	10～15歳	トルコ鞍上部
上衣腫	10～15,30～40歳	第四脳室、側脳室
髄芽腫	10～30歳	松果体部、トルコ鞍上部
脳幹部膠腫	～15歳	橋
視神経膠腫	～15歳	視神経視交叉