[Gastrointestinal carcinoma with skin diseases from the standpoint of surgery].

We encountered 21 patients with gastrointestinal carcinoma accompanied with skin diseases such as acanthosis nigricans, dermatomyositis, pemphigoid, erythrodermia, ichthyosis vulgaris, herpes zoster, Leser-Trélat's sign, Recklinghausen's disease and Gardner's syndrome. We have discussed such cases from the standpoint of surgery. There were 16 cases (76%) with gastric carcinoma, which were almost in the far advanced stage. Carcinomas of the other patients were seen in the esophagus, liver, pancreas, small intestine and rectum. Although skin lesions appeared before the onset of gastrointestinal symptoms in almost all cases, detection of carcinomas was very difficult until the symptoms emerged. In 6 of 21 patients (29%), carcinomas were detected by only skin manifestation, and they proved to be gastric cancer in all cases. Although the relationship of gastrointestinal carcinoma and skin diseases was unclear, we presented a 70-year-old woman with acanthosis nigricans accompanied with gastric cancer, whose skin manifestation was reduced by the therapy for gastric cancer. Therefore, some of these skin manifestation may be a symptom of the biological characteristics of the gastrointestinal carcinoma.