Brainstem tumor presenting with unilateral astereognosis

Area of Science:

• Neurology
• Neuroscience
• Radiology

Background:

• Brainstem tumors can present with diverse neurological deficits.
• Astereognosis, the inability to recognize objects by touch, is typically associated with cortical lesions.

Observation:

• A patient with a brainstem tumor exhibited astereognosis.
• Clinical presentation included a specific sensory processing deficit.

Findings:

• Computed tomography (CT) scans revealed a brainstem tumor.
• Evoked response studies and neuropsychological assessments supported a noncortical origin.
• Diagnostic findings localized the sensory defect to a non-cortical brain region.

Implications:

• This case highlights that brainstem lesions can manifest as astereognosis.
• It underscores the importance of considering non-cortical origins for sensory impairments.
• Findings contribute to understanding the complex sensory pathways affected by brainstem pathology.