CT Scan-Guided Abrams' Needle Pleural Biopsy versus Ultrasound-Assisted Cutting Needle Pleural Biopsy for Diagnosis in Patients with Pleural Effusion: A Randomized, Controlled Trial.

BACKGROUND: Image-guided pleural biopsies, both using ultrasound (US) or computed tomography (CT), are important in the diagnosis of pleural disease. However, no consensus exists regarding which biopsy needles are appropriate for specific procedures. OBJECTIVES: In this randomized, prospective study, we aimed to compare CT scan-guided pleural biopsy using an Abrams' needle (CT-ANPB) with US-assisted pleural biopsy using a cutting needle (US-CNPB) with respect to both diagnostic yield and safety. METHODS: Between February 2009 and April 2013, 150 patients with exudative pleural effusion who could not be diagnosed by cytological analysis were included in the study. The patients were randomized into either the US-CNPB group or the CT-ANPB group. The two groups were compared in terms of diagnostic sensitivity and complications. RESULTS: Of the 150 patients enrolled in this study, 45 were diagnosed with malignant mesothelioma, 46 were diagnosed with metastatic pleural disease, 18 were diagnosed with pleural tuberculosis, 34 were diagnosed with benign pleural disease, and 7 were lost to follow-up. In the US-CNPB group, the diagnostic sensitivity was 66.7%, compared with 82.4% in the CT-ANPB group; the difference between the two groups was statistically significant (p = 0.029). The sensitivity of CT-ANPB increased to 93.7% for patients with a pleural thickness ≥1 cm. The complication rates were low and acceptable. CONCLUSIONS: The first diagnostic intervention that should be preferred in patients with pleural effusion and associated pleural thickening on a CT scan is CT-ANPB. US-CNPB should be used primarily in cases for which only pleural thickening but no pleural effusion is noted.

The role of biomarkers in the diagnosis and treatment follow-up of idiopathic pulmonary fibrosis.

BACKGROUND AND AIM: Idiopathic pulmonary fibrosis (IPF) is a chronic and progressive lung disease of unknown cause with a poor prognosis. The aim of our study is to determine the role of Krebs von den Lungen-6(KL-6),Matrix metalloproteinase (MMP)-7, Surfactant protein A (SP-A), Surfactant protein D(SP-D), vascular endothelial growth factor (VEGF) and periostin in the diagnosis of IPF and in the response monitoring of patients treated. METHOD: 47 IPF patients, 27 non-IPF interstitial lung disease (ILD) patients and 21 healthy individuals were included in the study. Demographic data, pulmonary function test- Diffusing capacity of the lung for carbon monoxide (PFT-DLCO) measurements, High-resolution computed tomography (HRCT) findings of the patients were recorded, and serum samples were taken. RESULTS: While periostin and SP-A levels were not significantly different between IPF and non-IPF ILD, they were significantly higher in both IPF and non-IPF ILD compared to healthy control group (p=0.002,p=0.006 for periostin and p=0.002,p<0.001 for SP-A, respectively).By receiver operating characteristic (ROC) analysis, the cut-off point for periostin to distinguish IPF is >594.5 pg/ml (sensitivity 72%, specificity 76%), while the cut-off point for SP-A is found >6.62 ng/ml (sensitivity 87.2%,specificity 57.1%). In the combined ROC analysis based on SP-A=6.62 ng/ml and periostin >634.6 pg/ml values, sensitivity was found to be 85% and specificity was 57%.Considering the correlation of forced expiratory volume in the first second  (FEV1)(%), forced vital capacity (FVC)(%), restriction and diffusion severities with biomarker levels in the 6th month of IPF patients treated, a correlation was detected between MMP-7 levels and restriction severities (p=0.020), between KL-6 levels and restriction and diffusion severities (p=0.002), and between SP-A levels and FVC(%)(p=0.006). CONCLUSION: It is thought that biomarkers SP-A and periostin may contribute significantly to the diagnosis of patients with IPF, and SP-A, MMP-7 and KL-6 levels may contribute significantly to treatment follow-up.

Image-Assisted Pleural Needle Biopsy or Medical Thoracoscopy: Which Method for Which Patient? A Randomized Controlled Trial.

BACKGROUND: Image-guided or assisted needle biopsies and the increasing use of medical thoracoscopy (MT) have increased the diagnostic accuracy of pleural diseases significantly. However, no consensus exists regarding which patients with pleural effusion should undergo MT and which patients should undergo image-guided or assisted needle biopsy as the first procedure to ensure greater diagnostic accuracy. RESEARCH QUESTION: Which biopsy method is more appropriate for which patient to provide the highest diagnostic accuracy in the diagnosis of pleural effusion? STUDY DESIGN AND METHODS: This prospective, randomized, parallel study included 228 patients with undiagnosed exudative pleural effusion. Patients were divided into two groups based on CT scan findings. Group 1 included patients with pleural effusion only. Group 2 included patients with pleural thickening or lesion in addition to pleural effusion. Patients in each group were assigned randomly to an image-assisted Abrams needle pleural biopsy (IA-ANPB) or MT arm. The diagnostic sensitivity, reliability, and safety were determined for both groups. RESULTS: The false-negative rate was 30.3% for the IA-ANPB arm and 3.1% for the MT arm in group 1. The same rates were 11.9% for IA-ANPB and 4.7% for MT in group 2. In group 1, the sensitivity for the IA-ANPB arm was 69.7%, and the negative likelihood ratio was 0.30. The same rates for the MT arm were 96.9% and 0.03 (P = .009). In group 2, these values were 88.1% and 0.12 for the IA-ANPB arm and 95.4% and 0.05 for the MT arm (P = .207). The rate of complications between the two biopsy methods was not different (8.5% and 15.8%, respectively; P = .107). INTERPRETATION: MT showed a high diagnostic success in all patients with pleural fluid. However, IA-ANPB showed similar diagnostic success as MT in patients with pleural effusion and associated pleural thickening or lesions. Therefore, in the latter case, IA-ANPB could be preferable to MT. TRIAL REGISTRY: ClinicalTrials.gov; No.: NCT05428891; URL: www. CLINICALTRIALS: gov.

Diagnosis and Treatment Patterns of Chronic Thromboembolic Pulmonary Hypertension in Russia, Kazakhstan, Turkey, Lebanon, and Saudi Arabia: A Registry Study.

BACKGROUND: Patients with chronic thromboembolic pulmonary hypertension (CTEPH) in countries with limited resources have, to date, been poorly represented in registries. OBJECTIVE: This work assesses the epidemiology, diagnosis, hemodynamic and functional parameters, and treatment of CTEPH in Russia, Kazakhstan, Turkey, Lebanon, and Saudi Arabia. METHODS: A prospective, cohort, phase IV, observational registry with 3-year follow-up (n = 212) in patients aged ≥ 18 years diagnosed with CTEPH was created. Clinical, hemodynamic, and functional parameters were obtained at an initial visit, follow-up visits, and a final visit at the end of 3 years' observation or end of follow-up. Data were recorded on electronic case report forms. Parameters evaluated included 6-minute walking distance (6MWD), use of pulmonary endarterectomy (PEA), balloon pulmonary angioplasty (BPA), pulmonary hypertension (PH)-targeted therapy, and survival. All statistical analyses were exploratory and descriptive, and were performed in the overall population. RESULTS: The most common symptoms were typical of those expected for CTEPH. Almost 90% of patients underwent right heart catheterization at diagnosis or initial study visit. In total, 66 patients (31%) underwent PEA before the initial visit; 95 patients (45%) were considered operable, 115 (54%) were inoperable, and two (1%) had no operability data. Only 26 patients (12%) had been assessed for BPA at their initial visit. PH-targeted therapy was documented at diagnosis for 77 patients (36%), most commonly a phosphodiesterase type 5 inhibitor (23%). Use of PH-targeted therapy increased to 142 patients (67%) at the initial visit, remaining similar after 3 years. Use of riociguat increased from 6% of patients at diagnosis to 38% at 3 years. Between baseline and end of observation, results for patients with paired data showed an increase in 6MWD. Survival at the end of observation was 88%. CONCLUSIONS: These data highlight the current diagnosis and management of CTEPH in the participating countries. They show that early CTEPH diagnosis remains challenging, and use of off-label PH-targeted therapy is common. CLINICALTRIALS: gov: NCT02637050; registered December 2015.

[Segmentation of acute pulmonary embolism in computed tomography pulmonary angiography using the deep learning method]. / Derin ögrenme yöntemiyle akut pulmoner embolinin bilgisayarli tomografik pulmoner anjiografide segmentasyonu.

Introduction: Pulmonary embolism is a type of thromboembolism seen in the main pulmonary artery and its branches. This study aimed to diagnose acute pulmonary embolism using the deep learning method in computed tomographic pulmonary angiography (CTPA) and perform the segmentation of pulmonary embolism data. Materials and Methods: The CTPA images of patients diagnosed with pulmonary embolism who underwent scheduled imaging were retrospectively evaluated. After data collection, the areas that were diagnosed as embolisms in the axial section images were segmented. The dataset was divided into three parts: training, validation, and testing. The results were calculated by selecting 50% as the cut-off value for the intersection over the union. Result: Images were obtained from 1.550 patients. The mean age of the patients was 64.23 ± 15.45 years. A total of 2.339 axial computed tomography images obtained from the 1.550 patients were used. The PyTorch U-Net was used to train 400 epochs, and the best model, epoch 178, was recorded. In the testing group, the number of true positives was determined as 471, the number of false positives as 35, and 27 cases were not detected. The sensitivity of CTPA segmentation was 0.95, the precision value was 0.93, and the F1 score value was 0.94. The area under the curve value obtained in the receiver operating characteristic analysis was calculated as 0.88. Conclusions: In this study, the deep learning method was successfully employed for the segmentation of acute pulmonary embolism in CTPA, yielding positive outcomes.

Correlation of Indeterminate Lesions of COVID-19 Pneumonia Detected on Computed Tomography with RT-PCR Results.

BACKGROUND: The typical findings of COVID-19 pneumonia include multilobar groundglass opacities and consolidation areas observed predominantly in the basal and peripheral parts of both lungs in computed tomography. OBJECTIVE: The current study aimed to correlate indeterminate lesions of COVID-19 pneumonia detected on computed tomography with the results of the reverse transcription-polymerase chain reaction (RT-PCR) test. METHODS: Patients with high-resolution computed tomography images that were reported to contain indeterminate lesions in terms of COVID-19 pneumonia were included retrospectively in the study. The lesions were categorized and the patterns were classified. The RT-PCR-positive and the RTPCR- negative patients were compared. P<0.05 was accepted as the statistical significance limit. RESULTS: The RT-PCR-positive patients exhibited a higher rate of peripheral lesions. Limited consolidation areas were not detected in the RT-PCR-positive patients. In the RT-PCR-negative patients, the rates of acinar nodules and the tree-in-bud pattern were significantly higher. The RTPCR- negative patients had higher nodular contour features and lesion coalescence. In the subgroup consisting of lesions with ground-glass opacities and/or ground-glass opacity around the nodule, the rate of nodular contour positivity was significantly higher in the RT-PCR- positive patients. CONCLUSION: COVID-19 pneumonia should be suspected when peripheral indeterminate lesions are detected. When indeterminate lesions, such as tree-in-bud pattern, acinar nodules and limited consolidation area are detected, alternative diagnoses should be considered first, even if there are ground glass opacities accompanying these lesions.

Occupational exposures as risk factors for asthma and allergic diseases in a Turkish population.

PURPOSE: There has been no community-based epidemiological study on the relation of occupational exposures with asthma, rhinitis, and eczema in Turkey. We examined the relationship between occupational exposures and adult-onset asthma, wheezing, allergic rhinitis, and eczema in a Turkish adult population. METHODS: The data was collected from 1,047 adults, selected randomly from five distant family health centers. Questionnaires were filled by family practitioners with the help of interviews. The data included physician-diagnosed asthma, allergic rhinitis, eczema, wheezing, and occupational exposures. RESULTS: Wheezing in all the subjects was associated with past exposure to irritants (OR: 1.7, 95%CI: 1.0-2.9), wood/coal smoke (OR: 2.3, 95%CI: 1.0-5.3), metal dust (OR: 2.6, 95%CI: 1.2-5.7), volatile fumes (OR: 2.5, 95%CI: 1.1-5.3), and paper dust (OR: 3.7, 95%CI: 1.5-8.9). Past exposure to dust (OR: 4.1, 95%CI: 1.2-14.2) and to irritants (OR: 6.5, 95%CI: 2.0-20.4) were associated with increased prevalence of wheezing in nonsmokers, whereas current exposure to irritants was associated with decreased prevalence of wheezing (OR: 0.1, 95%CI: 0.01-0.9) in these subjects. In subjects who were regular smokers, exposure to metal dust (OR: 2.8, 95%CI: 1.2-6.5), volatile fumes (OR: 2.3, 95%CI: 1.0-5.3), and paper dust (OR: 3.3, 95%CI: 1.3-8.6) were the main causes for wheezing. Physician-diagnosed eczema was associated with occupational exposure to chemical fumes (OR: 3.7, 95%CI: 1.3-10.6). CONCLUSION: The present study showed that occupational exposures were associated with wheezing and eczema prevalence in the studied population. Nonsmokers could be more vulnerable to respiratory effects of occupational exposures due to healthy smokers effect.

Percutaneous and Endoscopic Adhesiolysis.

Low back and leg pain may be due to many causes including scarring in the epidural space. Scar tissue often causes irritated swollen and inflamed nerves, which can cause pain. Adhesiolysis eliminate the pain-causing effects of scar tissue by releasing or decompression of a nerve from scar tissue. Percutaneous adhesiolysis is a safe and effective procedure, while epiduroscopy is a minimally invasive technique that offers diagnostic and therapeutic advantages in cases of chronic low back pain and radiculopathy. The aim of this review is to describe the comparison of percutaneous and endoscopic procedures in the lysis of adhesions in epidural fibrosis in terms of indications, contraindications, complications, technique and efficacy..

Malignant pericardial mesothelioma following thoracal radiotherapy; dissemination from pericardium to pleura.

Malignant pericardial mesothelioma (MPeM) is a rare, primary pericardial tumor of mesodermal-origin. With respect to the etiology of MPeM, a history of exposure to asbestos has not been clearly demonstrated. MPeM is difficult to diagnose because of the non-specificity of the clinical complaints and symptoms. A known effective treatment does not exist and the prognosis is poor. In this case study, the possible etiologies of MPeM are discussed based on the extant literature. We report herein a patient with MPeM and no history of asbestos exposure who had chemo-radiotherapy for non-Hodgkin's lymphoma, and in whom a tumor spread from the pericardium through the pleura.

The efficacy of non-invasive positive pressure ventilation in ARDS: a controlled cohort study.

Few studies have investigated non-invasive positive pressure ventilation (NPPV) in acute respiratory distress syndrome (ARDS). The aim of this controlled cohort study was to determine the efficacy of NPPV in ARDS. Two hundred and eighty- seven patients were monitored in the respiratory intensive care unit over two years. Twenty-two subjects met the American-European consensus criteria for ARDS and were included in the study. Patients were prospectively allocated into standard therapy group and NPPV group. Indications for invasive mechanical ventilation were determined before study commencement. Invasive ventilation was applied to those needing intubation. Those in the NPPV group showing no indications for urgent intubation received NPPV in addition to standard medical therapy. Subjects with indications for intubation were intubated. Primary outcome was intubation rate; secondary outcome was hospital mortality. Seventeen patients were males, 18 (90%) patients were treated for pulmonary ARDS. Mean age was 45.2 years; mean PaO(2)/FiO(2) was 106.6. The need for intubation emerged for eight patients in the standard therapy group. Seven patients in the NPPV group received NPPV, and three patients in this group needed immediate intubation. NPPV was successful in 4 (57%) patients and the other three required intubation for high PEEP or NPPV intolerance. Mean duration of NPPV was 58.3 hours. There was no difference in Acute Physiology Assessment and Chronic Health Evaluation (APACHE) II scores and initial PaO(2)/FiO(2) values between successful and unsuccessful NPPV groups; but the difference between PaO(2)/FiO(2) ratios at 24 hours between these groups was statistically significant (193.0 and 93.3, respectively; p= 0.003). While using NPPV in ARDS patients, if improvement is not seen in the first day, invasive mechanical ventilation should be implemented immediately.

Postdural Puncture Headache and Acute Subdural Haematoma in Sjögren's Syndrome.

Although spontaneous intracranial hypotension cases related to connective tissue diseases have been reported in the literature, to the best of our knowledge, no cases of iatrogenic intracranial hypotension have been described. In this paper, we plan to discuss a case of acute subdural haematoma and postdural puncture headache that developed after spinal anaesthesia in a patient with Sjögren's syndrome.

Patient-controlled analgesia and morphine consumption in sickle cell anemia painful crises: A new protocol.

OBJECTIVES: The sudden and rapidly increasing severity of pain in sickle cell anemia painful crises frequently requires the use of strong opioids. Patients require continuous administrations of various doses (increased/decreased) within the following hours. This study aims to retrospectively evaluate the effects of a structured protocol based on standardized Visual Analogue Scale (VAS) and Patient-controlled analgesia (PCA) patient demand count on morphine consumption in painful crises. METHODS: A total of 177 painful crises of 93 patients who were administered morphine using the PCA method according to appropriate analgesia protocol between 2004-2018 were evaluated in this study. The demographic data, hemoglobin chromatography and genotypes, painful episode follow-up time, VAS scores before and after treatment, and daily morphine consumption of the patients were recorded. Morphine consumption during the crisis according to age groups and sex were compared. RESULTS: Of the patients, 57% were homozygous hemoglobin type SS (HbSS). Mean morphine consumption with PCA method was 56.9±35.4 mg (min-max: 10-232 mg) and mean follow-up time was 3.4±2.1 days (min.-max.: 1-11). VAS scores were significantly lower after treatment (6.8±2.3 pre-treatment; 0.8±0.6 post-treatment) (p<0.05). CONCLUSION: To our knowledge, our study is the first structured protocol based on VAS and PCA demand data. We believe lower morphine dosage using PCA protocol according to the rapidly changing pain levels of the patients will provide effective analgesia. Prospective studies with fewer limitations will more effectively demonstrate the effectiveness of this protocol.

Pleurodesis in follow-up and treatment of malignant pleural mesothelioma patients.

We analyzed the necessity of pleurodesis in the follow-up of the patients with malignant pleural mesothelioma (MPM), and how much it contributes to the survival period by determining the indications, efficiency, and reliability of the pleurodesis application. 191 patients were assessed retrospectively and 69 (36%) of them were established with a pleurodesis indication. In 42 patients accepting pleurodesis, the pleurodesis success was evaluated. Factors affecting the success of pleurodesis and the effect of pleurodesis on survival were assessed. Pleurodesis was a success in 26 (62%) of the 42 patients. In the group in which the pleurodesis process was a success, it was observed that KPS and pleural fluid pH were higher (p= 0.030, p= 0.032, respectively). In case of KPS > or = 80, the sensitivity was: 76.9%, specificity: 50.0%, PPV: 71.4%, and NPV was established as 57.1%. In case of pleural fluid pH > 7.27, the sensitivity was: 92.9%, specificity: 50.0%, PPV: 76.5%, and NPV was observed as 80.0%. In the group in which pleurodesis was a success, the median survival was longer (Log-rank: 11.2; p= 0.0008). Independently from chemotherapy, the chance of living longer for patients whose pleurodesis was a success was 2.6 times higher. A severe complication concerning the process was not observed. Pleurodesis is performed less frequently than it is assumed on patients with MPM. In patients with KPS > or = 80, pleural fluid pH > 7.27, and with indication, pleurodesis must be administered. In feasible patients, a successful pleurodesis with talc increases the survival of patients with MPM, and it can be safely administered.

Prospective Study of the Utility of Computed Tomography Triage of Pleural Biopsy Strategies in Patients With Pleural Diseases.

BACKGROUND: This study aimed to prospectively evaluate the efficacy and reliability of a diagnostic workup, triaging pleural biopsy method according to baseline computerized tomography (CT) findings in the diagnosis of pleural diseases. METHODS: Patients with pleural pathology were divided into 3 arms according to findings on CT scan images. Arm A: patients with pleural thickening/lesion in addition to pleural effusion. These patients underwent CT scan-guided Abrams' needle pleural biopsy. Arm B: patients with pleural effusion alone or suspected benign asbestos pleurisy. This group underwent medical thoracoscopy (MT). Arm C: patients with only pleural thickening. This group underwent ultrasonography-guided cutting needle pleural biopsy. MT was planned in patients who did not have a specific diagnosis in the CT scan-guided Abrams' needle pleural biopsy group. When patients with a histopathologic diagnosis of fibrinous pleuritis after MT were assessed in terms of the risk factors for malignant pleural diseases, we offered a further invasive procedure. RESULTS: A total of 164 patients were enrolled in the study. Diagnostic sensitivity after the initial procedure was 90.2% in Arm A, 93.3% in Arm B, 95.2% in Arm C, and 92.4% in the entire workup. The negative predictive value of the entire workup was 90.4% for malignant pleural mesothelioma, 97.1% for metastatic malignant pleural diseases, and 100% for tuberculous pleurisy. Five cases who had a diagnosis of fibrinous pleuritis after MT were detected to have risk factors, 4 of which (80%) indicated malignant disease. Complication rates were low and acceptable. CONCLUSION: Use of CT scans to triage an appropriate pleural biopsy method is associated with high diagnostic success. We recommend that the proposed diagnostic workup in this study may be used as a diagnostic algorithm for pleural diseases that require a histopathologic analysis. Determination of risk factors predicting malignant disease in patients where fibrinous pleuritis is reported after MT would be useful for clinical practice.

Predictors of talc pleurodesis outcome in patients with malignant pleural effusions.

OBJECTIVE: Chemical pleurodesis is an accepted palliative therapy for patients with recurrent, symptomatic, malignant pleural effusions (MPE). The purpose of the study was to determine the factors that have an effect on successful pleurodesis for MPE. PATIENTS AND INTERVENTIONS: Eighty-four consecutive patients with biopsy-proven malignant pleural disease and recurrent, symptomatic MPE were eligible to participate in this study. Five grams of talc mixed in 150ml of normal saline were administered via tube thoracostomy or small-bore catheters after complete drainage of the pleural effusion. RESULTS: Seven patients did not return for their 30-day follow-up visit and were excluded from further analysis. Successful pleurodesis was achieved in 63 of 77 eligible patients (81.8%) with MPE. In the univariate analysis, female gender, Karnofsky performance status, pleural fluid pH, cholesterol, and adenosine deaminase level showed a significant association with the probability of success. Multivariate logistic regression analysis showed that pleural fluid pH and ADA levels were independent predictors of talc pleurodesis outcome. CONCLUSION: Our results show that pleurodesis using talc as the sclerosing agent is a simple and acceptable procedure with high efficacy for controlling MPE, especially when used in appropriate patients.

Local recurrence of tumor at sites of intervention in malignant pleural mesothelioma.

In malignant pleural mesothelioma (MPM) patients, local dissemination (LD) of the tumor is frequently observed at the sites of intervention where diagnosis/treatment are performed. We evaluate the factors affecting LD frequency and discuss the use of PR in MPM patients. Histopathologically diagnosed 212 MPM patients who had not received PR were evaluated in terms of development of LD. Of the 212 patients, 29 received supportive therapy, 157 received chemotherapy and 26 received multi-modal therapy. The LD frequency was 13.2% for all patients. The median survival rate was 9 or 10 months in patients with or without LD, respectively. A higher LD frequency was observed in patients receiving thoracotomy. The LD appearance time in supportive care is short. The LD frequency in patients treated with chemotherapy that revealed progressive disease was higher than the patients who revealed stable disease or objective response. LD developed in 2 months in patients with sarcomatous and mixed cell type, and the survival rate was low. LD was not associated with the stage of the disease. The most suitable candidate groups for PR are patients receiving supportive therapy, thoracotomy without multi-modal therapy or patients with sarcomatous and mixed cell type tumors.

Epidemiology of pleural mesothelioma in a population with non-occupational asbestos exposure.

BACKGROUND AND OBJECTIVE: This study describes the epidemiology of malignant pleural mesothelioma (MPM) in a rural population with environmental asbestos exposure. METHODS: Patients with diagnosed MPM were recruited and their relevant demographic and exposure data were analysed. RESULTS: A total of 131 patients with MPM (59 men, 72 women) were studied. The patients' mean age was 57.8 years and the mean exposure duration was 28.9 years. The cumulative fibre count of the villagers ranged from 0.19 to 14.61 fibre/mL-years. Of the 131 patients, 85 had epithelial cell type, 20 had mixed, and eight had sarcomatous pleural mesothelioma. No significant relationship was found between asbestos fibre type and age, exposure period, or cellular type of MPM; similarly, no significant relationship could be found between the cellular type and age or exposure period. Patients with sarcomatous mesotheliomas were considerably older. Only five of 131 (3.8%) patients had a family history of mesothelioma. CONCLUSIONS: Environmental exposure to asbestos begins at birth and this may be important in the age of disease onset, if a threshold model for cancer initiation is operative. Both men and women had an excess risk of mesothelioma. Given that a family history of MPM was not common in this relatively homogenous patient group, a genetic predisposition to mesothelioma appears unlikely.

Relationship of metabolic alkalosis, azotemia and morbidity in patients with chronic obstructive pulmonary disease and hypercapnia.

BACKGROUND: Exacerbation of chronic obstructive pulmonary disease (COPD) is an important cause of morbidity and mortality, but the effect of metabolic compensation of respiratory acidosis (RA) on mortality is not fully understood. OBJECTIVE: To investigate the relationship between metabolic compensation and mortality in COPD patients with RA. METHODS: We prospectively investigated all COPD patients with RA admitted to the respiratory intensive care unit between February 2001 and March 2007. Two hundred and thirteen patients (159 male, 54 female; mean age 65 +/- 10.8 years) were divided into three groups (71 patients each) according to base excess (BE) levels: (1) low BE, (2) medium BE, and (3) high BE. H(+) concentration was calculated according to their standard formula and BE was calculated according to the Van Slyke equation. RESULTS: The overall mortality rate was 24.9%. The group mortality rates were 32, 17 and 25% in the low, medium and high BE groups, respectively (p = 0.001). When patients were divided into three groups according to the HCO(3)(-) levels, the group mortality rate was 59.1% in the low HCO(3)(-) group and 19.8% in the high HCO(3)(-) group. Based on univariate analysis, six factors affecting mortality were identified. However, multivariate analysis showed that the levels of serum HCO(3)(-) (p = 0.013; OR: 0.552; CI: 0.345-0.882) and creatinine (p = 0.019; OR: 2.114; CI: 1.132-3.949) had an independent effect. CONCLUSION: In patients with COPD exacerbation and hypercapnia, the development of sufficient metabolic compensation and adequate renal function significantly decreases mortality.

Soft tissue sarcoma metastatic to pleura.

Almost all cancers can cause distant pleural metastases. However, pleural metastases of soft tissue sarcoma that constitute less than 1% of adult solid malignancy are extremely rare. It is very difficult to distinguish them form sarcomatous malignant mesothelioma on histopathological features. We report a 57 year-old man who presented to us with left chest pain and progressive dyspnea and was diagnosed to have a pleural metastases of soft tissue sarcoma by thoracoscopic biopsy.