A Paraneoplastic Leukemoid Reaction in Primary Lung Sarcoma

Pulmonary malignancies are known to have high prevalence and mortality. They are associated with different paraneoplastic syndromes, especially pulmonary carcinomas, because they are more common than pulmonary sarcomas. We present a case of a 56-year-old African American male who was admitted to our institution with a three-month history of a dry cough, progressive shortness of breath, and two to three days of right arm swelling. He had extreme leukocytosis (WBC count of 106,500 cells/mm(3)). Computed tomography (CT) scan of the thorax demonstrated an irregular, thick-walled 14-cm lung mass occupying the middle and upper hemithorax. CT-guided biopsy of the mass confirmed the diagnosis of lung sarcoma.