Diagnosis:
Suggested by MRI and confirmed by pathology (brain biopsy/resection)
Findings on Investigations:
MRI:
- Interaventricular mass: fourth ventricle > lateral ventricles > third ventricle
- Homogenous mass, prominent flow voids (vascular), calcification
- Lateral ventricle trigone. In adults it occurs at the 4th ventricle.
- Calcification, hemorrhage may occur
- Enhance intensely
- Pathology:
Pathology:
Histology:
- Hyperplasia of bland looking (Minimal atypia) choroid plexus cells. Fibrovascular stalks. Mitosis are rare.
- Choroid plexus, epithelium
Immunohistochemistry: positive for= vimentin, keratin, S100.
Treatment:
Surgical resection, with or without radiation therapy