Presentation
Fainting attack lasting a few seconds, tingling and numbness of the right upper limb
Patient Data
Age: 60 years
Gender: Female
From the case:
Tentorium hypoplasia with partial occipital lobe herniation
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- Hypoplasia of superior part of right tentorium cerebelli with partial right occipital lobe herniation
- Lacunar infarct (7 mm) of left centrum semiovale
Case Discussion
- Fainting attack lasting a few seconds and tingling and numbness of right upper limb. Symptoms gone and patient recovered within 24 hours without residual neurological deficit. The episode was diagnosed as a TIA.
- Focal right tentorial cerebelli hypoplasia with partial herniation of right occipital lobe into posterior fossa. No history of visual symptom and this is reported as incidental developmental anatomical anomaly.
- Tentorial hypoplasia is usually associated with other posterior fossa and CNS malformations 1. Isolated tentorial hypoplasia is very rare and often reported as an incidental finding with no known clinical symptoms. Recently in 2018, Sun et al reported a case of isolated tentorial hypoplasia associated with left-sided homonymous hemianopia, which corresponded to involvement of the optic pathway white matter tract in the right occipital lobe herniation on MR tractography 2.