Tentorium hypoplasia with partial occipital lobe herniation

Case contributed by Pawel Spychalski
Diagnosis almost certain

Presentation

Headache.

Patient Data

Age: 55 years
Gender: Female

There is bilateral hypoplasia of the superior part of the cerebellar tentorium alongside bilateral partial occipital lobe herniation. 

There is bilateral hypoplasia of the superior part of the cerebellar tentorium alongside bilateral partial occipital lobe herniation. Apart from above, no other abnormality was noted.

Case Discussion

There is bilateral hypoplasia of the superior part of the cerebellar tentorium alongside partial bilateral occipital lobe herniation. The patient was asymptomatic and this was considered an incidental finding. 

Isolated tentorium cerebelli hypoplasia is rare with only a few cases reported in the literature; tentorium cerebelli hypoplasia is usually associated with other congenital abnormalities such as Dandy-Walker malformation or Chiari malformation.

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