Benign mesotheliomas are not as dangerous as the malignant forms of mesothelioma. There is a form of pleural mesothelioma which can be both malignant or benign. The benign form is non-cancerous and usually, it is not life-threatening like the malignant form. Three types of benign pleura mesotheliomas include: plaques, thickening, and effusions. The plaques are small and have hard surfaces which form around the asbestos fibers, making them more visible. These plaques are actually not very dangerous, and they indicate to the patient or the physician that the patient may have other asbestos-related disease which may be more dangerous and not benign. Pleural thickening is a result of when the asbestos fibers transport themselves from the lungs to the pleura and cause the pleura to thicken, and as a result, fibrosis occurs. Breathing problems may arise from this pleural thickening, for the thickening can disallow the lungs to expand to their full amount. In the process of pleural effusion, fluid accumulates in the pleural area in the body. Pains in the chest area may result, but it does not have many other symptoms. Again, it is not very dangerous, but it should not also be ignored, for it may lead to other mesothelioma cases. Treatments for these benign forms of mesothelioma are much more successful than treating a malignant form of pleural mesothelioma. Since the tumor ismore successful than treating a malignant form of pleural mesothelioma. Since the tumor is non-cancerous, there is a high chance that the patient will survive after diagnosis.