Enlarged Lymph Node with Unilateral Tingling: Differential Diagnosis and Urgency

An enlarged lymph node plus ipsilateral tingling suggests possible neurologic involvement or compressive pathology requiring prompt evaluation.

Potential Causes

• Cervical lymphadenopathy + radiculopathy: Enlarged node (infection, lymphoma, metastatic) compressing nerve root (C5–T1) → dermatomal tingling.
• Brachial plexopathy: Node in supraclavicular/axillary region compressing plexus.
• Spinal cord/nerve root lesion: Disc herniation, stenosis, tumor—lymph node may be incidental or reactive.
• Infectious/Inflammatory: Shingles (VZV) → dermatomal pain/tingling + reactive nodes.
• Paraneoplastic/autoimmune: Rare.

Workup

• History: Duration, progression, constitutional symptoms, exposure.
• Exam: Node characteristics (size, consistency, mobility, tenderness); neurologic (sensory, motor, reflexes).
• Imaging: Ultrasound (node), MRI (neck/brain/brachial plexus).
• Labs: CBC, ESR/CRP, LDH, viral serologies, SPEP.
• Biopsy: If node >1 cm, hard, fixed, supraclavicular, or persistent >4 weeks.

Urgency

Same-day evaluation if: progressive weakness, numbness spreading, bowel/bladder changes, respiratory difficulty, or suspected spinal cord compression.

Do not ignore new neurologic symptoms with lymphadenopathy.