Two patients had agranulocytosis complicating infectious mononucleosis. Agranulocytosis appears to be an infrequent, self-limited complication of this primary disease. The differential diagnosis of agranulocytosis should include infectious mononucleosis, particularly in a young person.
Koziner B, Hadler N, Parrillo J, Ellman L. Agranulocytosis Following Infectious Mononucleosis. JAMA. 1973;225(10):1235-1236. doi:10.1001/jama.1973.03220380047012