Related Experiment Video
Updated: May 15, 2026

Primary Culture of Human Vestibular Schwannomas
Published on: July 20, 2014
Schwannoma originating in lateral recess of the fourth ventricle
Rajneesh Kachhara1, Prakash Raje, Apoorva Pauranik
1Department of Neurosurgery, Bombay Hospital, Indore, India.
Abstract:
Intracranial schwannomas most commonly occur in relation to vestibular nerves followed by trigeminal nerves. Authors describe a very unusual case of schwannomas originating in lateral recess of the fourth ventricle. Tumor was completely excised micro-surgically via midline suboccipital craniectomy and C1 laminectomy. Dissection of the surgical specimen revealed that the tumor was completely free from surrounding structures and just hanging in the fourth ventricle. It was not attached to any cranial nerves, brain parenchyma, and blood vessel or to the dura mater. Histopathological examination confirmed the diagnosis of schwannoma. To our knowledge, no such case has been reported so far from this extremely rare location. Relevant literature is reviewed and hypothesis for ectopic location of these tumors has been highlighted.
Related Concept Videos
Anatomy of the Brain: Ventricles
Spinal Cord: Cross-sectional Anatomy
Gray Matter and its Components
Central to the gray matter is...
Spinal Nerves: Anatomy
There are 31 bilateral pairs of spinal nerves, each emerging from the spinal cord through the intervertebral foramina—openings between adjacent vertebrae. These nerves are...
