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Benign localized mesothelioma of the pleura

Eleven cases of benign localized mesotheliomas of the pleura are described. Ten patients were asymptomatic and discovered by routine X‐rays. In eight cases the tumour was localized in the visceral pleura and all tumours showed only a benign mesenchymal component. Non‐neoplastic epithelial structures can become entrapped within the tumour. A benign clinical behaviour and an excellent prognosis could be expected after surgical resection.