Extreme Leukocytosis in a Man after a Half Marathon Race

Leukocytosis is most often defined as an elevated white blood cell count greater than 11.0 × 109 per L in adults, and a relatively common finding. Normal adult levels of leucocytes 4.5 to L. It importance for clinicians be able distinguish nonmalignant from malignant conditions, differentiate between the non-malignant causes leukocytosis. Extreme leukocytosis can seen broad spectrum clinical conditions human body under stress. commonly found patients suffering leukemia or severe bacterial infections, but also people after hard exercise [1-7]. The present case describes young healthy man, extreme syncope during half marathon.