Giant cell carcinoma of the lung with hypertrophic pulmonary osteoarthropathy as a paraneoplastic syndrome: a case report.

Background: Hypertrophic pulmonary osteoarthropathy is a rare syndrome characterized by a triad that includes periostitis, digital clubbing, and painful arthropathy of the large joints, especially large joints in the lower limbs with lung cancer. Herein we describe a case of a giant cell carcinoma of the lung with hypertrophic pulmonary osteoarthropathy as a paraneoplastic syndrome. The tumor was successfully resected, and complete remission of the syndrome was achieved after surgery.