[Primary mucinous carcinoma of the skin].

Primary mucinous carcinoma of the skin is a rare malignant tumour originating from the sweat glands. It is often misdiagnosed clinically since it has an uncharacteristic and variable presentation, and microscopically because it resembles a cutaneous metastasis from the more frequent mucinous adenocarcinomas of the colon, mammae, lungs and ovaries. The tumour often recurs, but mortality is low. We present a case with regional lymph node metastases five years after excision of the primary tumour.