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Objective: To evaluate efficacy of diagnostic procedures, results of surgery, and complications in malignant pleural diseases., Material and Methods: From 1999 to 2006, 169 patients underwent treatment in the Department of Thoracic Surgery and Oncology, Institute of Oncology, Vilnius University. Patients were divided into two groups: group I, patients with primary pleural malignant diseases (93 patients, 55.0%), and group II, secondary pleural tumors (76 patients, 45%). Of the 76 patients, 40 patients (52.6%) were diagnosed with metastatic pleural tumors and 36 patients (47.4%) with tumors invading parietal pleura. We used noninvasive and invasive methods for diagnosis. Noninvasive methods included chest x-ray, chest computed tomography, magnetic resonance imaging, chest ultrasound, positron emission tomography/computed tomography (performed in Germany), and invasive methods included puncture of pleural effusions, transthoracic pleural puncture, drainage, pleural biopsy and video-assisted thoracoscopic pleural biopsy, pleural resection, and ultrasound-guided needle biopsy of the pleura. The following procedures were performed in group I: pleurectomy in 15 patients (16.1%), pleural pneumonectomy in 42 patients (45.2%), pleural decortication in 12 patients (12.9%), extended pleuropneumonectomy with diaphragm and pericardium resections and plastic surgery in 14 patients (15.0%), pleurectomy with costal resections in 10 patients (10.1%). Procedures performed in group II included video-assisted thoracoscopic pleurectomy in 15 patients (19.7%), pleural biopsy in 10 patients (13.2%), pleurectomy in 15 patients (19.7%), pleural drainage and fenestration in 5 patients (6.5%), lung and pleura resection in 12 patients (15.8%), chest wall and pleura resection in 10 patients (13.2%), diaphragm and pleura resections in 9 patients (11.8%)., Results: Early stage primary pleural tumors were found in 24 patients (25.8%). Metastatic pleural disease was found in 32 patients with early primary tumors (80.0%). In all 36 patients (100.0%) with chest wall tumors, disease of advanced stage was determined. Main surgical complications of the group I were observed in 26 patients (27.9%). Six patients (6.5%) died after surgery. In group II, 23 patients (30.2%) had postoperative complications; 3 patients (3.9%) died., Conclusions: In noninvasive methods, the highest sensitivity was achieved for chest computed tomography and magnetic resonance imaging (97%); the specificity of chest magnetic resonance imaging was 100%, and the specificity chest computed tomography and magnetic resonance imaging--98%. The accuracy of chest x-ray plus computed tomography was 98%. In invasive methods, accuracies of pleural biopsy, video-assisted thoracoscopic pleural biopsy, and pleurectomy were 100%, 90%, and 100%, respectively. In case of primary pleural tumors, the main surgery was extended pleuropulmonectomy (45.2%) with or without mediastinal resection. Mortality rate was 6.5%. In case of metastatic pleural disease, the main surgery was video-assisted thoracoscopic pleurectomy (19.7%). Mortality was rate 5%. In cases of pleural invasion by other thoracic malignancies, the main surgeries were chest wall and pleural resection (13.2%) and lung and pleural resection (15.8%). Mortality rate was 2.8%. After 169 operations due to malignant pleural diseases, the rate of postoperative complications ranged from 1.3% to 7.8%.

Background: Despite intensive use of asbestos, no cancer case has ever been diagnosed as asbestos related in Lithuania. This paper attempts to estimate the proportion of those occupationally exposed to asbestos among respiratory cancer patients., Material and Methods: Occupational exposure to asbestos was assessed retrospectively for 298 lung cancer and four mesothelioma patients, admitted to the Institute of Oncology, Vilnius. The evaluation was based on personal interview data using an internationally established questionnaire covering most likely activities of asbestos exposure at the workplace. Cumulative exposure to asbestos at work was estimated in fiber years. Lung tissue asbestos fiber burden analysis was conducted by scanning transmission electron microscopy on 23 samples., Results: A cumulative asbestos exposure of > or =25 fiber years was found for 10 lung cancer patients (3.4%). They worked in foundries, construction, installation, shipyard, power plant, railway, asbestos cement, glass and chemical industry. In a further 56 lung cancer patients (18.8%) and for one (25%) mesothelioma patient, a cumulative exposure from 5 to 24.9 fiber years was assessed. Asbestos fibers were detected in 18 cases, the burden ranged from 0.1 to 4.1 million fibers/g dry lung tissue; concentrations exceeding 1 million f/g dry lung tissue were found in four cases. All fibers were chrysotile., Conclusions: Findings indicate that a fraction (3.4%) of the lung cancer cases could be attributed to heavy occupational exposure to asbestos using the Helsinki criterion of > or =25 fiber years. Therefore, approximately 50 lung cancer cases per year in Lithuania could be asbestos-related compensable occupational diseases.

Unlabelled: Objective of our work was to evaluate: incidence, ethiology, diagnostic and treatment methods of malignant pleural mesothelioma., Material and Methods: During period 1992-2001 125 cases of pleural mesothelioma were diagnosed in Lithuania. Conventional X-rays and ultrasound were used in 125 cases (100%), chest CT scans in 57 (45.6%), and chest X-rays and CT scans in 38 (30.4%) cases. In 5 cases (4.0%) we performed chest CT scans and MRI. Various surgical diagnostic methods were used: videothoracoscopy in 35 (28.0%) cases, pleural biopsies 72 (57.6%) cases, diagnostic "mini" thoracotomies - 18 (14.4%) cases. Malignant pleural mesothelioma in all cases was proved morphologically. These operations were performed: pleuropulmonectomies - 62 (60.1%), extended pleuropulmonectomies with resections of pericardium and subtotal diaphragm - 10 (9.7%), parietal pleurectomies without resection of lung and pericardium - 17 (16.5%), partial pleurectomies with resection of pericardium - 4 (3.8%), debulking of tumor (partial resections) - 10 (9.7%). Totally 103 patients were operated (82.4%). Twenty two patients were treated conservatively when diagnosis was confirmed. There were such main postoperative complications: fistulas of bronchial stump - 6 cases (5.8%), chylothorax - 5 cases (4.8%), injury of sympatic ganglion - 2 cases (1.9%), and hemothorax - 10 cases (9.7%); 3 patients (2.91%) died after operation., Results: Mean survival time after combined treatment was 12+/-2 months. After conservative treatment alone - 6.0+/-2 months. In combined treatment group 22 patients (17.6%) had recurrence of disease during 3 years. In conservative treatment group no one survived 3 years., Conclusions: Combined surgical treatment of malignant pleural mesothelioma is still the most effective. Most of diagnosed cases were found in delayed stage. Mean survival time after combined treatment is 12.0+/-2 months, after conservative - 6.0+/-2 months, and recurrence of the disease during 3 years - 17.6% and 100% respectively.

Unlabelled: The objective of our paper was to show the data of our treated patients with malignant pleural mesothelioma. In the Department of Thoracic Surgery of Oncology Institute at Vilnius University from 1980 till 01.06.2002, 33 patients (pts), to whom diagnosis of pleural mesothelioma was confirmed by pathologist, were treated in the Clinic. A malignant pleural mesothelioma was diagnosed in 31 pts, two pts had a non-malignant form of mesothelioma. Among patients were 19 men and 14 women. The distribution of pts according to the stage of the disease was: I stage - 3, II - 1, III - 17, IV - 10. Videothoracoscopy is the best method for diagnosing pleural mesothelioma. Radical operations were performed only in 17 cases: 6 - pulmonectomy with pleuroectomy, 1 - lobectomy, 3 - atypical segmentectomy, 4 - pleuroectomy, 4 - tumorectomy. Thoracotomy was performed in 9 cases. Insufflation of talc was performed in 6 pts. Adjuvant therapy (chemotherapy or radiotherapy) was given to 10 pts., Results: Nineteen pts died of the progression of disease. Median survival of pts was 15.7 months., Conclusions: 1. Diagnosis of malignant pleural mesothelioma is difficult and confirmation of the disease is possible only after histological examination of tumor. 2. The best results of treatment were achieved after combined treatment: surgery, after chemotherapy and radiotherapy. 3. In cases of pleural effusion of diffuse pleural mesothelioma insufflation of talc or other chemical substances into pleural cavity is recommended.