Abdurrahman Abakay

A clinical, radiographic and laboratory evaluation of prognostic factors in 363 patients with malignant pleural mesothelioma.

Background: Malignant pleural mesothelioma (MPM) has a poor prognosis. Objectives: Only few studies in literature investigated the presence of pleural fluid and radiographic findings for the prognosis of MPM. Methods: We retrospectively investigated the hospital charts of 363 MPM patients who were diagnosed from January 1989 to March 2010. Survival time was calculated by the Kaplan-Meier method. Pretreatment clinical, laboratory and radiographic features of each patient at the time of diagnosis were obtained from patients’ charts. Results: The mean age of 363 patients (217 men, 146 women) was 50.6 ± 11.2 years (range 19–85) and the mean survival time was 11.7 ± 8.6 months (range 1–53). Histological types of MPM were epithelial (71.2%), mixed (15.9%) and sarcomatous type (4.9%). The frequency of disease stages were 31.4% for stage 1, 24.2% for stage 2, 28.6% for stage 3 and 15.8% for stage 4. The most frequent symptoms were dyspnea (82.1%), chest pain (68.3%) and weight loss (58.9%). Results of univariate and multivariate analyses revealed that a Karnofsky performance score ≤60, a pleural fluid glucose level ≤40 mg/dl, a C-reactive protein level >50 mg/l, a serum lactate dehydrogenase level >500 U/l, the presence of pleural fluid, pleural thickening >1 cm and a platelet count of >420 × 103/µl were found to be associated with poor prognosis in MPM. Conclusions: Our data suggest that low pleural fluid glucose and high C-reactive protein, the presence of pleural fluid and pleural thickening were associated with poor MPM prognosis. Further prospective studies are needed to highlight prognostic factors more clearly.

Risk factors for drug resistant tuberculosis in southeast Turkey

SUMMARY We undertook a cross-sectional survey of 116 patients at Dicle Hospital, Turkey, who had with bacteriologically confirmed tuberculosis (TB). Demographic and clinical features, including age, gender, pulmonary TB history, associated diabetes mellitus, previous TB treatment, residential area and education, were collected from charts. Eighty-four of the strains were found to be susceptible to all drugs. The resistance to one or more drug(s) was found in 32 strains. Multi-drug resistant (MDR) TB was found in 13 strains (11.3% of the total and 40.7% of the drug resistant strains). The resistance to isoniazid was the most frequently seen (25 strains, 21.5%). In the multivariable analysis, only previous TB treatment (P = 0.000) remained a significant predictor for drug resistance; in MDR, previous TB treatments (P = 0.002) remained significant in the final model. The patients educational status was found to be negatively correlated with the risk of MRD-TB (P = 0.035). Previous TB treatment and low educational status were found to important risk factors for the development of MDR-TB.

Obstructive sleep apnoea, cigarette smoking and serum testosterone levels in a male sleep clinic cohort

This study evaluated the impact of obstructive sleep apnoea (OSA) and smoking on total serum testosterone levels in 96 men (mean age 43.3 years; range 25-60 years) attending a sleep clinic. Fifty-five men (57.3%) had OSA, defined as an apnoea–hypopnoea index of ≥ 15 events/h, recorded during overnight polysomnography, and 42 (43.8%) were current smokers. Mean serum total testosterone levels were significantly lower in OSA subjects (3.4 ng/ml) than in non-OSA subjects (3.9 ng/ml), whereas no significant difference was observed between current smokers and non-smokers. In a multiple linear regression analysis, serum testosterone was negatively correlated with body mass index and the apnoea–hypopnoea index, but not with age and pack-years of smoking. Our results support previous observations regarding testosterone levels in men with OSA, but, contrary to some earlier reports, there was no positive relationship between smoking and total testosterone in the present cohort.

An approach based on probabilistic neural network for diagnosis of Mesothelioma's disease

Malignant mesothelioma (MM) is an aggressive progress tumor that results from mesotel cells and pleura usually incurs. The two important causes, in MM etiologies are known as asbestos and erionite, both mineral fibers. Environmental asbestos exposure and MM are one of the major public health problems of Turkey. In this study, two different probabilistic neural network (PNN) structures were used for MMs disease diagnosis. The PNN results were compared with the results of the multilayer and learning vector quantization neural networks focusing on MMs disease diagnosis and using same database. It was observed the PNN is the best classification with 96.30% accuracy obtained via 3-fold cross-validation. The MM disease dataset were prepared from a faculty of medicines database using new patients hospital reports from south east region of Turkey.

Breast Tuberculosis in Southeast Turkey: Report of 27 Cases

Background: Breast tuberculosis (TB) is a very rare form of TB. Case series on breast TB are scarce. Patients and Methods: The patients with breast TB treated between 2004 and 2008 at our hospital were retrospectively investigated. Results: All patients were female (mean age 31.5 ± 8.4 years). All but 1 patient were new cases. Patients presented with swelling of the breast (48.1%), mass and fluctuation (each, 40.7%), and breast pain (18.5%). The mean treatment duration was significantly shorter in 14 patients who received directly observed therapy (DOT) compared with those (n = 12) who did not (6.7 ± 1.7 months vs. 8.5 ± 1.6 months, respectively; p = 0.01). Seven patients underwent segmental mastektomy as complementary surgery. The highest rate of breast TB was seen in 2007 (37.1% compared with 14.8% between 2004 and 2006). Conclusions: Breast TB should be considered in patients with breast neoplasia, swelling, and discharge, and can be successfully treated by DOT with shorter treatment duration.

Is a complete blood cell count useful in determining the prognosis of pulmonary embolism

SummaryBackgroundPulmonary embolism (PE) is the third cardiovascular cause of hospital admission, following acute coronary syndrome and stroke. Despite high-tech diagnostic methods and new treatment modalities, PEs continue to have a high mortality rate within the first 3 months. This study was designed to assess the additional prognostic value of a complete blood cell count, renal function markers, C-reactive protein, and simplified pulmonary embolism severity index (sPESI) scoring system in PE 100-day mortality.Materials and methodsThe study retrospectively enrolled 208 consecutive patients who were hospitalized with the diagnosis of an acute PE. The patients’ demographic characteristics and clinical and laboratory parameters were recorded from the hospital electronic database and patient’s case notes. The primary end point of the study was an adverse 100-day outcome, defined as death from any cause.ResultsThe all-cause mortality in the first 100 days was 14.42 %. The mean age was 57.87 ± 18.17 (range: 16–93) years. We included 79 (38 %) male and 129 (62 %) female individuals. Red cell distribution width (RDW) and sPESI were found to be statistically significant predictors of PE mortality by multivariate regression analysis. On multivariate regression analysis, RDW was associated with a 4.08-fold (95 % confidence interval: 1.229–13.335, P = 0.021) increase in PE mortality.ConclusionThe results of this study demonstrated that RDW and sPESI may be a useful guide in predicting 100-day mortality. The elevated RDW may alert physicians to possible poor prognosis.ZusammenfassungGrundlagenDie Pulmonalembolie (PE) ist nach dem akuten Koronarsyndrom und dem Schlaganfall der dritthäufigste kardiovaskuläre Grund für eine Aufnahme ins Spital. Trotz hochtechnisierter Diagnostik und neuen Behandlungsmethoden haben Patienten mit einer PE noch immer eine hohe Mortalität innerhalb der ersten 3 Monate nach dem Ereignis. Die vorliegende Studie hat es sich zum Ziel gemacht, den zusätzlichen prognostischen Wert eines kompletten Blutbilds (kBB), des CRPs, von Markern der Nierenfunktion und von einem vereinfachten PE-Schweregrad Index (sPESI) in Bezug auf die Mortalität innerhalb der ersten 100 Tagen nach einer PE zu erheben.Material und MethodenDie Studie erfasste retrospektiv 208 konsekutive Patienten (79 (38 %) Männer, 129 (62 %) Frauen), die wegen der Diagnose einer akuten PE hospitalisiert worden waren. Die demographischen Charakteristika und Laborparameter wurden aus den elektronisch gespeicherten Spitalsdaten und individuellen Krankengeschichten erhoben. Der primäre Endpunkt der Studie war Tod jeder Ursache innerhalb der ersten 100 Tage.ErgebnisseDie Gesamtmortalität betrug 14,42 % innerhalb der ersten 100 Tage. Das mittlere Alter der Patienten lag bei 57,87 ± 18,17 (range: 16–93) Jahren. Die multivariate Regressionsanalyse ergab, dass die Verteilung der Erythrozytenbreite (RDW) und der erhobenen sPESI statistisch signifikante Prädiktoren der Mortalität nach PE waren. In dieser Analyse war die RDW mit einem 4,08 fachen (95 % CI: 1,229–13,335, P = 0,021) Anstieg der Mortalität nach PE verbunden.SchlussfolgerungenDie Ergebnisse dieser Studie zeigen, dass die RDW und sPESI im Bezug auf die Beurteilung der Prognose nach PE nützlich sein können. Erhöhte RDW könnten den Arzt auf eine möglicherweise schlechtere Prognose hinweisen.

The value of inflammatory parameters in the prognosis of malignant mesothelioma

Objective This study investigated the relationship between potential prognostic parameters that may be associated with increased inflammation and survival in patients with malignant mesothelioma (MM). Methods This retrospective study assessed potential prognostic parameters measured at the time of MM diagnosis. Data on asbestos exposure, histopathological subtype of MM and laboratory parameters were collected. Results In 155 patients with MM (90 male), mean survival time was 13.9 months. In univariate analysis, age ≥60 years and neutrophil-to-lymphocyte ratio (NLR) ≥3 were associated with significantly shortened median survival times. In multivariate analysis, nonepithelial subtype, red cell distribution width (RDW) ≥20% and NLR ≥3 were associated with significantly shortened median survival times. Mortality rate was increased 2.77-, 1.67- and 1.52-fold in patients with RDW ≥20%, NLR ≥3 and nonepithelial subtype, respectively. Nonepithelial subtype, white blood cell count ≥11 200 µl and platelet-to-lymphocyte ratio ≥300 at baseline were associated with a heightened NLR value. Conclusions The NLR and RDW were significant predictive factors for MM prognosis.

The protective role of caffeic acid phenethyl ester against streptomycin ototoxicity.

OBJECTIVE The aim of this experimental study was to investigate the efficacy of caffeic acid phenethyl ester (CAPE) in the prevention of streptomycin-induced ototoxicity. MATERIALS AND METHODS Thirty-two adult Wistar albino rats were divided into 4 groups: control (n = 8), streptomycin (n = 8), CAPE (n = 8), and streptomycin + CAPE (n = 8). Rats were tested with distortion product otoacoustic emissions (DPOAEs) before drug administration. The animals in all groups were killed under general anesthesia on the 45th day following last DPOAE measurements. Hearing results were analyzed statistically to determine differences in amplitudes of DPOAE. Also, the cochleas of each rat were evaluated by histopathological and immunohistochemical examination. RESULTS Significant difference was not observed in cochlear hair cells in the control and CAPE groups. In the streptomycin group, severe degeneration of hair cells and increased apoptotic cells were observed. In the streptomycin + CAPE group, although some deteriorations were observed, hair cells were mostly preserved. The DPgram of the streptomycin and streptomycin + CAPE groups was significantly deteriorated (P < .05). The analysis of the DPgram results revealed statistically significant differences between the groups of streptomycin and streptomycin + CAPE (P < .05). CONCLUSIONS Caffeic acid phenethyl ester treatment attenuated hair cells injury in the inner ear, possibly via its antioxidant effect. Prophylactic administration of CAPE for streptomycin ototoxicity ameliorated hearing deterioration in rats.

Clinical characteristics and treatment outcomes in 132 patients with malignant mesothelioma.

Purpose: Our objective is to scrutinize clinical, laboratory, radiological characteristics, treatment regimens, and treatment outcomes of malignant mesothelioma (MM) cases in our hospital. Materials and Methods: We investigated, retrospectively, the clinical characteristics and treatment outcomes of all 132 MM patients at Dicle University Hospital between January 2006 and April 2010. Results: A total of 82 (62.1%) patients were male, and 50 (37.9%) female. Median age was 56.0 years. Mean survival time was 9.6±6.9 months. Mean survival time of patients who had received best supportive care was 7.5 months, chemotherapy 10.4 months, and multimodality treatment regimen 12.6 months. Patients in the multimodality treatment group survived longer than did those in the other two groups (P=0.042). A total of 76 patients received chemotherapy, of whom 17 (22.3%) were administered Cisplatin/Carboplatin and Gemcitabine, 58 (76.4%) Cisplatin/Carboplatin and Pemetrexed, and one (1.3%) Cisplatin + Docetaxel. Complete and partial response to treatment in patients receiving Cisplatin/Carboplatin and Gemcitabine was found 47.1% and Cisplatin/Carboplatin and Pemetrexed was found 50.0% (P>0.05). Conclusions: MM related to asbestos exposure is seen frequently in Turkey. Patients present with the typical clinical features of dyspnea, weight loss, and chest pain. Survival analysis shows that patients receiving multimodality treatment may be better.

Oxidative Status and Acute Phase Reactants in Patients with Environmental Asbestos Exposure and Mesothelioma

Background and Objectives. The aim of this study was to investigate inflammatory indicators and oxidative status in patients with asbestos exposure with and without mesothelioma and to compare results with data from healthy subjects. Methods. Eighty people with exposure to environmental asbestos and without any disease, 46 mesothelioma patients, and a control group of 50 people without exposure to environmental asbestos were enrolled in this prospective study. Serum total oxidant level (TOL), total antioxidant capacity (TAC), and oxidative stress index (OSI), CRP, transferrin, ceruloplasmin, α-1 antitrypsin, ferritin, and copper levels were measured. Results. Mesothelioma group exhibited higher TOL, OSI, α1-antitrypsin, ferritin and copper levels as compared to the other groups (P < 0.001, P = 0.007, P < 0.0001, P < 0.001, and P < 0.001, resp.). Transferrin was lower in the mesothelioma group than in the other two groups (P < 0.001). The asbestos group had higher TOL, TAC, α1-antitrypsin, and transferrin levels (P < 0.001, P < 0.001, P < 0.001, and P < 0.001, resp.), as well as lower OSI and ferritin levels as compared to the control group (P < 0.001 and P < 0.001). Conclusions. We believe that elevated acute phase reactants and oxidative stress markers (TOL and OSI) in the mesothelioma group can be used as predictive markers for the development of asbestos-related malignancy.