Symptoms Associated with These MRI Findings
This patient's MRI findings—moderate chronic small vessel disease with periventricular white matter hyperintensities, a left posterior putamen lacunar infarct, and a right superior cerebellar lacunar infarct—are likely causing cognitive impairment (particularly executive dysfunction and slowed processing speed), motor dysfunction, gait disturbance, and potentially mood changes including depression or apathy 1.
Cognitive Manifestations
The moderate chronic small vessel disease with confluent periventricular white matter hyperintensities represents significant vascular burden that commonly manifests as:
- Executive dysfunction (problems with planning, decision-making, problem-solving)
- Slowed processing speed
- Attention deficits
- Memory impairment (particularly learning and recall)
The 2025 Canadian Stroke Best Practice Guidelines emphasize that beginning confluent or confluent subcortical white matter hyperintensities on the Fazekas scale are sufficient to cause clinical cognitive dysfunction 1. At age 84 with moderate disease burden, this patient falls squarely into the vascular cognitive impairment (VCI) spectrum, which affects approximately 20% after first stroke and over one-third with multiple strokes 1.
Motor and Coordination Symptoms
The left posterior putamen lacunar infarct may cause:
- Right-sided motor weakness (pure motor hemiparesis is a classic lacunar syndrome)
- Right-sided sensorimotor deficits
- Possible movement disorders (though less common with posterior putamen location)
The right superior cerebellar lacunar infarct typically produces:
- Ataxic hemiparesis (weakness combined with incoordination on the left side)
- Gait imbalance and instability
- Coordination difficulties affecting the left upper and lower extremities
These lacunar syndromes are well-established clinical presentations 2, 3. The cerebellar location is particularly important for balance and coordination, while the putamen involvement affects motor control pathways.
Gait and Balance Impairment
The combination of small vessel disease burden and cerebellar infarction creates substantial risk for:
- Gait disturbance (shuffling, reduced speed, widened base)
- Falls risk (significantly elevated)
- Postural instability
Recent guidelines specifically highlight that SVD causes motor impairment, impaired balance, and falls as major clinical features beyond just cognitive symptoms 4.
Neuropsychiatric Symptoms
Small vessel disease commonly produces:
- Depression (frequently coexists with VCI through shared mechanisms) 5
- Apathy (loss of motivation and initiative)
- Personality changes
- Emotional lability
The 2025 guidelines note that behavioral symptoms including depression, apathy, and personality change are increasingly recognized as important clinical features of cerebral small vessel disease 4.
Other Potential Symptoms
- Urinary urgency or incontinence (from disruption of frontal-subcortical circuits)
- Dysarthria (speech articulation difficulties, particularly if there are additional undetected lacunes)
- Vascular parkinsonism (bradykinesia, rigidity, shuffling gait)
Important Clinical Considerations
Many of these symptoms may be subtle or attributed to "normal aging" by patients and families, leading to underrecognition. The American Heart Association guidelines emphasize that cognitive complaints are common but can be affected by anosognosia (lack of awareness of deficits), meaning patients may underreport problems 5.
The clinical threshold varies between patients based on cognitive reserve—higher educational attainment and premorbid intelligence may partially mitigate symptoms 5. However, at age 84 with moderate disease burden, symptomatic manifestations are highly likely.
Progressive nature: These findings represent chronic disease that typically progresses over time. The lacunar infarcts indicate prior symptomatic or silent strokes, and the moderate white matter disease suggests ongoing microvascular injury 6, 7. Without aggressive vascular risk factor management, further cognitive decline and functional deterioration are expected.
Formal cognitive assessment is warranted even if symptoms seem mild, as objective testing often reveals deficits not apparent in casual interaction 1.