Pediatric Choroid Plexus Papilloma

  • Etiology: Benign neoplasm arising from choroid plexus epithelium
  • Imaging:
    — Atrium of lateral ventricle most common site
    — Hydrocephalus due to obstruction or excessive production of cerebrospinal fluid
  • Imaging CT: Hyperdense lesion
  • Imaging MRI: Papillary or cauliflower type margin
    — T1WI post contrast: Marked enhancement
    — T2WI: Central decreased signal
  • DDX: Difficult to distinguish from choroid plexus carcinoma but choroid plexus carcinoma tends to be more heterogenous in signal and may invade adjacent parenchyma
  • Complications:
  • Treatment: Surgical
  • Clinical: Commonly in first year of life

Radiology Cases of Choroid Plexus Papilloma

MRI of choroid plexus papilloma
Axial (above left), coronal (above right) and sagittal (below) T1 MRI with contrast of the brain shows an avidly enhancing round mass that has a frond-like pattern in the third ventricle causing marked dilation of the lateral and third ventricles.