Hypertrophic osteoarthropathy (HOA) typically occurs concurrently with club
bing of the digits, with isolated HOA being reported only rarely. We report
two patients with intra-thoracic malignancy in whom HOA, demonstrated on b
one scintigraphy, developed in the absence of clubbing. We also report the
novel observation of involvement of the metatarsal and metacarpal bones by
HOA.