MyPACS.net: Radiology Teaching Files > Case 1091335

never visited AQUEDUCTAL STENOSIS
Contributed by: Children's Hospital Omaha, Radiologist, Omaha Childrens, Creighton University and UNMC, Nebraska, USA.
Patient: 2 year old male
History: 2yo male presents with vomiting and hydrocephalus
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Findings:

NCCT head demonstrates marked hydrocephalus involving the bilateral lateral ventricles, and third ventricle with a normal or small forth ventricle.

MRI confirms these findings with evidence a narrowed cerebral aqueduct. Findings consistant with aqueductal stenosis.

Also there is no transependymal spread of CSF suggesting a chronic obstruction. The corpus callosum is complete but thinned by the hydrocephalus. Dilation of the 3rd ventricle causes splaying of the cerebral peduncles with anterior displacement of the optic chiasm. The floor of the 3rd ventricle is imperceptible and is thinned or absent.

Diagnosis: Aqueductal Stenosis
Discussion:

Aqueductal Stenosis

The aqueduct develops at 6weeks gestation

Most common cause of congenital hydrocephalus M:F 2:1

Etiology - Infectious - toxo, CMV, syphilis, mumps, influenza
Developmental - transverse septum, X-linked recessive
Neoplastic - glioma, pinealoma, meningioma

May be associated with thumb dysplasia

References:

Dahnert - Radiology review manual

Submitted by Mark Gorrie

Comments:
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Additional Details:

Case Number: 1091335Last Updated: 02-09-2005
Anatomy: Cranium and Contents   Pathology: Non-Infectious Inflammatory Disease
Modality: CT, MRExam Date: Access Level: Readable by all users

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