Finite element analysis of periventricular lucency in hydrocephalus: Extravasation or transependymal CSF absorption?

Hakseung Kim, Eun Jin Jeong, Dae Hyeon Park, Zofia Czosnyka, Byung C. Yoon, Keewon Kim, Marek Czosnyka, Dong Ju Kim

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


OBJECTIVE: Periventricular lucency (PVL) is often observed in the hydrocephalic brain on CT or MRI. Earlier studies have proposed the extravasation of ventricular CSF into the periventricular white matter or transependymal CSF absorption as possible causes of PVL in hydrocephalus. However, there is insufficient evidence for either theory to be conclusive. METHODS: A finite element (FE) model of the hydrocephalic brain with detailed anatomical geometry was constructed to investigate the possible mechanism of PVL in hydrocephalus. The initiation of hydrocephalus was modeled by applying a transmantle pressure gradient (TPG). The model was exposed to varying TPGs to investigate the effects of different geometrical characteristics on the distribution of PVL. The edema map was derived based on the interstitial pore pressure. RESULTS: The model simulated the main radiological features of hydrocephalus, i.e., ventriculomegaly and PVL. The degree of PVL, assessed by the pore pressure, was prominent in mild to moderate ventriculomegaly. As the degree of ventriculomegaly exceeded certain values, the pore pressure across the cerebrum became positive, thus inducing the disappearance of PVL. CONCLUSIONS: The results are in accordance with common clinical findings of PVL. The degree of ventriculomegaly significantly influences the development of PVL, but two factors were not linearly correlated. The results are indicative of the transependymal CSF absorption as a possible cause of PVL, but the extravasation theory cannot be formally rejected.

Original languageEnglish
Pages (from-to)334-341
Number of pages8
JournalJournal of Neurosurgery
Issue number2
Publication statusPublished - 2016


  • Biomechanics
  • Finite element model
  • Hydrocephalus
  • Intracranial pressure
  • Periventricular lucency
  • Transmantle pressure gradient

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology


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