florid cutaneous papillomatosis, malignant acanthosis nigrica. palmoplantar keratoderma, and gastric adenocarcinoma

florid cutaneous papillomatosis (fcp), is a rare cutaneous marker of internal malignancy. the underlying cancer is usually intra-abdominal (most often gastric in origin), and evolves parallel to the fcp. there is a common association between fcp and the other two eruptive paraneoplastic syndromes, i.e.malignant acanthosis nigricans and the sign of leser-trelat. it seems possible that these syndromes develop via a common pathogenic pathway due to production of a factor similar to human epidermal growth factor by the underlying cancer. we report a case of fcp associated with malignant acanthosis nigricans, palmoplantar keratoderma and gastric adenocarcinoma.