幼儿侧脑室占位性病变双语

History:Toddlerundergoingimagingafterhavingasingleseizure.Patientwasdevelopmentallyandneurologicallynormalpriortopresentation.

学步幼儿（1岁左右）惊厥发作一次，在此之前发育和神经系统表现正常。

CTimagesareshownbelow.

CT图像如下

MRimagesareshownbelow.

MR图像如下

Findings

CT:CTimagesdemonstrateamildlyhyperattenuatingintraventricularlobularmassarisingwithinthelateralbodyoftherightlateralventricle.Thereisassociatedventriculomegaly,indicativeofatleastmildhydrocephalus.

MRI:MRimagesconfirmthepresenceofawell-delineated,lobulatedmassintherightlateralventricle.MassisisointensetograymatteronT1-weightedimaginganddemonstratesheterogeneousenhancementfollowinggadolinium-DTPA.Brightperiventricularsignalonaxialfluid-attenuatedinversion-recovery(FLAIR)imageslikelyrepresentsmildtransependymalinterstitialedemaduetohydrocephalus.

Differentialdiagnosis

Choroidplexuspapilloma/carcinoma

Intraventricularmeningioma

Papillaryependymoma

Diagnosis:

Choroidplexuspapilloma

(WHOgradeI)

表现

CT：右侧侧脑室体部内略高密度分叶状肿物，合并有脑室扩大，提示轻度脑积水。

MRI：右侧侧脑室体部边界清楚的分叶状肿物，T1WI呈与灰质相同的等信号，增强扫描不均质强化。FLAIR示侧脑室周围高信号，提示脑积水所致的室管膜周围轻度间质性水肿。

鉴别诊断：

脉络丛乳头状瘤/癌

脑室内脑膜瘤

乳头状室管膜瘤

诊断：脉络丛乳头状瘤（WHOI级）

Keypoints

Choroidplexustumors(CPTs)

Choroidplexustumorsareintraventricular,papillaryneoplasmsderivedfromchoroidplexusepithelium.

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