Mononucleosis-like illness as a manifestation of carbamazepine-induced anticonvulsant hypersensitivity syndrome.

We describe a case of infectious mononucleosis-like as a manifestation of carbamazepine-induced anticonvulsant hypersensitivity syndrome. Patch testing to carbamazepine and phenytoin were positive and negative to phenobarbital. Our results suggest a cell mediated type of immune response in the pathogenesis of this syndrome. Patch testing may be helpful in the diagnosis of anticonvulsant hypersensitivity syndrome caused by carbamazepine.