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Unusual localization of a choroid plexus papilloma in a 4-year-old female
Kevin M Rostasy1, Stefanie Sponholz, Erik Bahn
1Division of Pediatric Neurology, Department of Pediatrics, Georg-August-Universität, Göttingen, Germany.
Insights
This report details a rare choroid plexus papilloma found in a child. The tumor
Area of Science:
- Pediatric neurosurgery
- Neuropathology
- Neuroradiology
Background:
- Choroid plexus papillomas are rare tumors typically found in the lateral ventricles of children.
- Clinical presentation often includes signs of increased intracranial pressure.
Observation:
- A 4-year-old female presented with a posterior fossa tumor.
- The tumor exhibited histologic characteristics of a choroid plexus papilloma.
Findings:
- The tumor's origin was identified as the ependymal lining near the pontomedullary junction, not the expected fourth ventricle roof.
- This represents a novel, unreported location for this type of tumor.
Implications:
- This case expands the known anatomical locations for choroid plexus papillomas.
- Highlights the importance of considering atypical presentations in pediatric posterior fossa tumors.
Abstract:
Choroid plexus papillomas are rare tumors that are confined to areas in which the choroid plexus is normally located. In children, choroid plexus papillomas are predominantly located in the lateral ventricles. Clinically they present with signs of raised intracranial pressure, such as vomiting and increasing head size. Here we report on the clinical, radiologic, and histologic findings of a 4-year-old female who was found to have a tumor in the posterior fossa that had all the histologic hallmarks of a choroid plexus papilloma. This tumor did not originate from the roof of the fourth ventricle as expected but from the ependymal lining covering the median rostral medulla near the pontomedullary junction, a location that so far has not been reported.
