Cerebellar Hematoma Location: Implications for the Underlying Microangiopathy

Area of Science:

• Neurology
• Neuroradiology
• Pathology

Background:

• Spontaneous cerebellar intracerebral hemorrhage (ICH) is often linked to hypertension.
• A subset of cerebellar ICH may stem from cerebral amyloid angiopathy (CAA).

Purpose of the Study:

• To investigate if cerebellar hematoma location (deep vs. superficial) indicates the underlying small-vessel disease pathology (CAA or hypertensive vasculopathy).

Main Methods:

• Retrospective analysis of cerebellar ICH patients.
• Classification of hematoma location (deep vs. superficial) based on pathological reports.
• Evaluation of cerebral microbleed (CMB) patterns on MRI.

Main Results:

• Superficial cerebellar ICH was associated with a higher prevalence of strictly lobar CMBs (43%) compared to deep ICH (6%).
• Hypertension was more common in deep ICH (89%) than superficial ICH (65%).
• Strictly lobar CMBs were significantly associated with superficial cerebellar ICH (OR, 3.8; P=0.004).

Conclusions:

• Superficial cerebellar ICH correlates with strictly lobar CMBs, a marker for cerebral amyloid angiopathy.
• Cerebellar hematoma location may aid in identifying patients with CAA pathology.