Can a brain tumor cause tingling sensations in both lower legs, feet, and arms?

Can a Brain Tumor Cause Tingling in Both Lower Legs, Feet, and Arms?

Yes, a brain tumor can cause bilateral tingling in the extremities, but this presentation is uncommon and typically indicates either leptomeningeal metastasis, spinal cord involvement, or increased intracranial pressure rather than a localized brain parenchymal tumor.

Understanding the Mechanism

Brain tumors typically cause focal neurologic deficits based on their specific location rather than bilateral symmetric sensory symptoms 1. The most common presenting symptoms of primary brain tumors include headache (50%), seizures (20-50%), neurocognitive impairment (30-40%), and focal neurologic deficits (10-40%) 2.

When Bilateral Tingling Occurs with Brain Tumors:

Leptomeningeal metastasis is the most likely explanation for bilateral extremity tingling in a cancer patient:

• Sensorimotor deficits of extremities are a recognized manifestation of leptomeningeal disease, which involves multifocal CNS areas 3
• This occurs when tumor cells seed the leptomeningeal surfaces and CSF pathways, causing symptoms at multiple neurologic levels simultaneously 3
• Radicular signs including weakness and sensory changes can affect multiple extremities 3

Increased intracranial pressure from any brain tumor can cause generalized symptoms, though bilateral symmetric tingling is not a typical manifestation 4, 1.

Critical Distinction: Peripheral vs. Central Causes

The "glove and stocking" distribution of bilateral tingling affecting hands and feet is characteristic of peripheral neuropathy, not brain tumors 3, 5:

• Chemotherapy-induced peripheral neuropathy presents with numbness, tingling, and pain in a stocking-glove distribution, beginning distally in fingers and toes 3
• This is primarily sensory and length-dependent, affecting lower extremities more prominently 3
• Peripheral neuropathies from cancer occur through direct nerve invasion, paraneoplastic mechanisms, or treatment effects—not from brain parenchymal tumors 6

Diagnostic Approach

If a patient with suspected brain tumor presents with bilateral extremity tingling:

1. Consider leptomeningeal metastasis first if the patient has known cancer:

   • Obtain contrast-enhanced MRI of the entire neuraxis (brain and spine) 3
   • Look for sulcal enhancement, ependymal enhancement, cranial nerve enhancement, or cauda equina nodules 3
   • Perform detailed neurological examination documenting multifocal deficits 3

2. Evaluate for peripheral neuropathy causes:

   • Review chemotherapy exposure history (taxanes, platinum agents, vinca alkaloids) 3, 6
   • Assess for metabolic causes, vitamin deficiencies, or other systemic conditions 5
   • Consider nerve conduction studies if diagnosis unclear 3

3. Assess for spinal cord compression or involvement:

   • Bilateral symptoms suggest a central lesion at the spinal cord level rather than brain 1
   • MRI of the spine is essential 3

Common Pitfall

Do not assume bilateral symmetric tingling in extremities is from a brain tumor without considering more likely causes. A localized brain parenchymal tumor would cause focal deficits corresponding to its anatomic location, not bilateral symmetric sensory symptoms 1. The bilateral nature strongly suggests either leptomeningeal disease, spinal pathology, or peripheral neuropathy 3, 6.