The quite widespread type of malignant tumor is mesothelioma, which is caused by protracted contact with asbestos. It usually attacks the lungs and abdomen. There might be also unusual cases damaging other inner organs. Nowadays there is no efficient treatment of mesothelioma. There are however several mesothelioma treatment variants: chemotherapy, radiation treatment and surgery. Most of people diagnosed with mesothelioma were defenseless to asbestos for over 25 years. That's why the job, where the employee contacts with particles of asbestos is considered to be particularly dangerous. The liquids in pleura are the cause of frequent pangs in the chest if the man suffers from the malignant mesothelioma lung cancer. Such kind of mesothelioma as peritoneal one may cause the loss of weight, blood clotting and some problems with deglutition. That is very hard to reveal the not innocent mesothelioma, because its symptoms are quite alike to other diseases. The case report of examined patient has to be carefully read. In case it comprises some information of exposure to asbestos doctor has to suppose the presence of mesothelioma. This patient has to be physically examined by an oncologist. The inspection may be supported by X-ray scans. To determine the final diagnosis, biopsy should be performed. But the modern method of solving this problem was designed recently. The cells contaminated by malignant neoplasm can't produce the normal level of proteins. The principle of the new system is based on checking their levels to reveal malignant tumor. It allows earlier detection of the illness than more traditional methods thus making it more likely for the person to live. Such form of malignant neoplasm as mesothelioma is very difficult. After the illness is fond out most of conventional systems make patient to live up to one year. For instance, mesothelioma surgery even when utilized among with other cures has been producing mostly negative outcomes. The reason for that is that doctors cannot remove all of the mesothelium. If they did, the patient would die instantly. Resorting to the radiation usage to treat the malign mesothelioma patient has more chances to achieve success. All the methods mentioned above are frequently used in complex. Such complex of procedures brings more probability to left alive and continue struggle with illness. But using without other cure options radiation therapy wouldn't give the positive results. Moreover it can be quite harmful. To deal with the cancer that hasn't been partially removed by physician it is necessary to apply the fatal draught of radiation. The development of cancer cells can be subdued or held up by utilizing chemotherapy. Usually these drugs have severe side effects on healthy cells as well and thus are promoted in combination with preparations which decrease their harmful side effects. The pemetrex and cisplasin complex is considered to be very beneficial and is utilized in chemotherapeutics. Even modern technologies and perfect knowledge can't completely treat some peritoneal mesothelioma, unfortunately.