Incidental Tentorial Cerebelli Hypoplasia: A Case Report and Comprehensive Literature Review of Its Clinical and Imaging Characteristics.

Authors

Husam Hamshary, Mosub Qatu, Fathi Milhem, Radi Kukhun, Zaid Sawaftah, Mohammad Bdair, Abdelfattah M Dahmas, Qutaiba Ja'far A Mahmoud, Omar Naseef, Mohammed Ibrahim Abu Kamesh

Published in

Case reports in medicine. Volume 2026. Pages 2788624. Epub Jun 28, 2026.

Abstract

Tentorial hypoplasia is a rare congenital condition characterized by underdevelopment or absence of the tentorium cerebelli, a dural structure separating the cerebrum from the cerebellum. It is often detected incidentally on computed tomography (CT) or magnetic resonance imaging (MRI) and may be associated with conditions such as Dandy-Walker syndrome and Chiari malformation, although many cases remain asymptomatic. Imaging plays an essential role in identifying associated abnormalities when present.
Case 1: A 16-year-old male presented with a left subdural hematoma following a road traffic accident. Neuroimaging incidentally revealed tentorial hypoplasia with brain herniation into the quadrigeminal cistern, though he remained asymptomatic. Case 2: A 3-year-old child with metastatic neuroblastoma had incidentally discovered tentorial hypoplasia with brain herniation on CT and MRI, with no neurological deficits.
Tentorial hypoplasia is often an incidental finding with a favorable prognosis, though early imaging is essential for identifying associated central nervous system (CNS) malformations and guiding management.

PMID:
42371500
Bibliographic data and abstract were imported from PubMed on 29 Jun 2026.

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