Unilateral Axillary Lymphadenopathy After COVID-19 Vaccine Causing Medial Cord Plexopathy

CASE: The global reach of coronavirus disease 2019 has led to the rollout of new generation messenger ribonucleic acid (mRNA) vaccines. As populations are vaccinated, some side effects will become more apparent. We present a case of unilateral lymphadenopathy resulting in a transient plexopathy presenting as neuralgic pain, paresthesia, and numbness in the hand. CONCLUSION: Multiple image modalities and electrodiagnostic studies were used to infer the diagnosis. This condition was expectantly managed, and the patient's symptoms resolved within weeks.