Pleural mesothelioma metastasis of the scalp.

Mesothelioma is a locally aggressive malignant tumor that arises on the mesothelial surfaces of the pleura, peritoneum and tunica vaginalis. There are three histologic subtypes of mesothelioma: epithelioid, biphasic, and sarcomatoid. Pleural mesothelioma is usually characterized by diffuse pleural thickening. Disease progression is characterized by local invasion of the chest wall and lung. Lymphatic metastasis is rare and hematogenous metastasis is much rarer. The purpose of these case reports is to emphasize that pleural mesothelioma metastases can occur in unexpected places and to contribute to the literature.