[Paraneoplastic hyperleukocytosis in lung cancer].

Paraneoplastic leukocytosis in solid tumors is associated with poor prognosis. While mild leukocytosis is common, paraneoplastic hyperleukocytosis is extremely rare. The case of a 73-year-old male diagnosed with an adenocarcinoma of the lung and a peak white blood cell count of 178,000/µl is reported.