Localized benign mesothelioma of the pleura associated with a hypoglycemic episode

A patient had severe, episodic hypoglycemia with a mass occupying almost the entire left hemithorax. This mass was initially thought to be an inoperable intrathoracic malignant neoplasm. The findings during operation and the histologic appearance, however, were of a unique, localized benign mesothelioma.