Given below is a clinical feature often associated with a tumour, what is the tumour?

Hyperophic osteoahropathy is encountered in 1% to 10% of patients with lung carcinoma. Rarely, other forms of cancer are involved. This disorder is characterized by(1) periosteal new bone formation, primarily at the distal ends of long bones, metatarsals, metacarpals, and proximal phalanges; (2) ahritis of the adjacent joints; and (3)clubbing of the digits.Robbins pathology 9e pg:332