[Skin metastasis of gastric adenocarcinoma. Case report].

Incidence of cutaneous metastases of malignant tumors has been estimated between 0.7%-10.8%. These lesions generally occur in late stages of disease, being uncommon their presentation at the time of diagnosis. We inform the case of a male patient who presented a metastatic adenocarcinoma in the skin of the chest. The histopathological analysis showed signet ring carcinoma cells. Under the suspect of primary tumor in the gastrointestinal tract, an upper gastrointestinal endoscopy was made corroborating diagnosis of a primary gastric cancer. The case instructs the unusual morphology of cutaneous metastasis of gastric adenocarcinoma, as well appearing as the initial clinical data in an extended malignant disease. Key words: cutaneous metastases, metastatic adenocarcinoma, gastric carcinoma, Mexico.