Erythema gyratum repens.
D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000150:complications*; D004892:Erythema Multiforme / Q000150:complications / Q000473:pathology*; D006801:Humans; D008175:Lung Neoplasms / Q000150:complications*; D008297:Male; D012867:Skin / Q000473:pathology