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Updated: May 22, 2026

Cerebellar Regional Dissection for Molecular Analysis

Cerebellar Regional Dissection for Molecular Analysis

Published on: December 5, 2020

Macrocerebellum: significance and pathogenic considerations.

Andrea Poretti¹, Volker Mall, Martin Smitka

¹Department of Pediatric Neurology, University Children's Hospital of Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland.

Cerebellum (London, England)

|April 25, 2012

Summary

Macrocerebellum, a rare large cerebellum finding, is caused by thickened gray matter. Patients exhibit diverse neuroimaging, clinical, and genetic features, indicating it

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Area of Science:

Neuroscience
Pediatric Neurology
Medical Imaging

Background:

Macrocerebellum is a rare condition with an abnormally enlarged cerebellum.
Few cases of syndromal or isolated macrocerebellum have been documented.

Purpose of the Study:

To categorize MRI findings in children with macrocerebellum.
To quantify cerebellar size using volumetric analysis.
To characterize neurological, dysmorphic, and cognitive outcomes, and genetic findings.

Main Methods:

Qualitative MRI evaluation for infratentorial and supratentorial abnormalities.
Volumetric analysis of cerebellar size compared to age-matched controls.
Collection of clinical and genetic data from patient histories and follow-up.

Main Results:

Thickening of cerebellar cortical gray matter identified as the cause of macrocerebellum.
All patients presented with additional infra- and supratentorial abnormalities.
Common findings included hypotonia, impaired motor/cognitive development; ocular movement disorders in 3/5 patients.
Significant heterogeneity in dysmorphic features and extracerebral organ involvement observed.
Submicroscopic chromosomal aberrations detected in 2/5 patients.

Conclusions:

Macrocerebellum results from cerebellar cortical gray matter thickening, potentially involving granule cells.
Heterogeneous neuroimaging, clinical, and genetic profiles suggest macrocerebellum is a structural manifestation of diverse underlying biological disturbances rather than a distinct entity.