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Thalamic abscess: a stereotactically treatable lesion.

D Hollander¹, J G Villemure, R Leblanc

¹Department of Neurology and Neurosurgery, Montreal Neurological Hospital and Institute, McGill University, Que., Canada.

Applied Neurophysiology

|January 1, 1987

Summary

A thalamic lesion initially suspected as a malignant glioma was diagnosed as a cerebral abscess. Stereotactic aspiration confirmed the diagnosis, enabling effective antibiotic treatment and patient recovery.

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Area of Science:

Neurology
Neurosurgery
Radiology

Background:

Space-occupying lesions in the brain can present with diverse clinical and radiological features.
Differentiating between primary brain tumors and infectious processes like abscesses is critical for appropriate management.

Observation:

A 69-year-old male presented with abdominal pain, fever, chills, and acute hemiplegia.
Initial computed tomography (CT) revealed a thalamic space-occupying lesion with hematoma, mimicking a malignant glioma.
Persistent fever and leukocytosis, along with follow-up CT showing ring enhancement and ependymitis, suggested a cerebral abscess.

Findings:

Stereotactic aspiration successfully drained the thalamic abscess, relieving mass effect.
Pus analysis identified the causative organism, guiding targeted antibiotic therapy.

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The patient's symptoms resolved following appropriate treatment.

Implications:

Contrast-enhanced CT is crucial for evaluating hemorrhage within mass lesions.
Stereotactic techniques allow safe tissue diagnosis of deep brain lesions.
Early and accurate diagnosis of cerebral abscesses is vital for favorable outcomes.