Severe Bilateral Cervical Lymphadenomegaly Associated with Ethosuximide

Lymphadenomegaly associated with antiepileptic drugs is well documented; however, severe lymphadenopathy mimicking a neoplasm is a rare adverse event associated with antiepileptic drugs. It is usually characterized by a large cervical mass associated with fever, weight loss, skin rash, and abnormal complete blood count (atypical lymphocytes, eosinophilia, and abnormal neutrophil count). In this case report, we described a child with severe bilateral cervical lymphadenomegaly associated with ethosuximide, in which excisional biopsy of the enlarged nodes was needed to establish the final diagnosis. Prognosis was excellent after drug discontinuation.