[Retrospective evaluation of patients who were diagnosed as infectious mononucleosis between 1984-2005].

In this study, the clinical and laboratory features of 26 infectious mononucleosis (IMN) cases who have been diagnosed between the years of 1984-2005 were evaluated retrospectively. The mean age of the patients was 26+/-11 years, the rate of being hospitalized was 65%, and mean hospitalization period was 9.2+/-6 days. Fever (81%), weakness (50%), sore throat (50%), headache (50%) and swollen neck (35%) were the most common symptoms, while in the physical examination cervical lymphadenopathy (81%), splenomegaly (69%), hyperemic pharynx (65%), hepatomegaly (54%) and tonsillitis (50%) were observed. Laboratory results yielded leukocytosis in 21%, leucopenia in 12%, anemia in 44%, thrombocytopenia in 5% and elevated transaminase levels in 84% of the patients. Of the patients 15 (57.7%) had the history of using antibiotics before the diagnosis. Serological diagnosis was performed by Paul-Bunnel test and/or IgM positivity against Epstein-Barr virus (EBV) viral capsid antigen (VCA). Tonsillo-pharyngitis secondary to edema and respiratory distress due to lymphadenopathy pressure were detected in four patients, whereas pancytopenia was established only in one patient, as complications. This study emphasized that, although IMN is a self-limited infection, the diagnostic difficulties may arise when the clinical course is atypical, and rarely seen life-threatening complications may also develop during IMN course.