Remitting seronegative symmetrical synovitis with pitting oedema associated with lung malignancy.

RS3PE syndrome is an inflammatory disease which affects mainly males and responds rapidly to low-dose steroids. We describe the concurrence of RS3PE and lung malignancy in a 78-year-old woman. We recommend that an underlying malignancy should always be excluded in patients with RS3PE syndrome, even when general signs and symptoms such as weight loss, anorexia and fever are absent or uncertain.