Paraneoplastic granulocytosis in an advanced lung cancer patient.

Paraneoplastic syndromes (PNPs) refer to cancer-associated signs and symptoms arising in organs and tissues that are remote from the cancer and unrelated to metastasis. Currently the best described PNPs are attributed to tumor secretion of functional peptides and hormones or immune cross-reactivity between tumor and normal host tissues. Paraneoplastic hematologic syndromes are observed more rarely. Here we report a case of paraneoplastic granulocytosis in an advanced lung cancer patient.