Hypercalcemia-leukocytosis syndrome in a patient with cavitating squamous cell carcinoma of the lung.

INTRODUCTION: Lung cancer is the leading cause of death among the cancers seen in the United States. Hypercalcemia and leukocytosis are two common paraneoplastic syndromes associated with lung cancer. Unfortunately patients presenting with Hypercalcemia- leukocytosis syndrome has a worse prognosis than patients presenting with lung cancer alone. CASE PRESENTATION: We present a 67 yr old Caucasian male with a history of active smoking presenting as pneumonia being diagnosed as cavitating squamous cell carcinoma of the lung with hypercalcemia-leukocytosis syndrome CONCLUSION: There should be a high degree of suspicion to diagnose lung cancer in patients presenting with symptoms of paraneoplastic syndrome.