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Introduction: CT-guided tru-cut biopsy, which is less invasive and cost-effective, is an important diagnostic tool with high accuracy in lesions located peripherally in the lung. In this article, CT-guided tru-cut biopsy experiences of thoracic surgeons are shared., Materials and Methods: CT-guided tru-cut biopsy was performed on 200 patients with suspected lung lesions in the thoracic surgery clinic. Diagnostic rates of biopsies, complications, factors affecting the development of complications, and complication management were examined., Results: The diagnostic rate of the biopsies was 88%. Pneumothorax developed in 19.5% and hemothorax in 1% after the procedure. There was a significant relationship between mass dimensions and total complication rates (p=0.017). The relationship between the distance among the pleura and the mass and the development of complications was significant (p<0.001). The relationship between the number of biopsies and the development of pneumothorax was significant (p=0.011). The relationship between the size of the mass and the development of pneumothorax was significant (p=0.011). In univariate binary logistic regression analysis, a significant correlation was found between the size of the mass and the development of total complications (odds ratio (OR)=0.356 (95% CI: (0.146-0.868), (p=0.023))., Discussion: In the diagnosis of lung lesions, CT-guided tru-cut biopsy is an effective diagnostic tool with high diagnostic power, with its less invasiveness, and lower cost. The increase in the lung parenchyma distance passed with the biopsy needle increased the likelihood of complications most significantly. The size of the mass and the number of biopsies also had significant effects on the development of complications.

Objective: To compare the detection of transthoracic tru-cut biopsy performed on metabolically active areas in positron emission tomography (PET) for the diagnosis of lung cancer, compared to only CT scan-guided biopsy., Study Design: Descriptive study., Place and Duration of Study: Department of Thoracic Surgery, Kayseri City Training and Research Hospital, Turkey, between December 2020 to June 2021., Methodology: Patients of suspected lung cancer with pre-transthoracic biopsy chest computerised tomography and without positron emission tomography were included in Group A; while, patients with both and positron emission tomography chest computerised tomography were included in Group B. Based on the CT findings of the patients in Group A, a biopsy was obtained from the most appropriate place. The patients in Group B were evaluated by a nuclear medicine specialist and the place with the highest maximum standardised uptake value before the biopsy was marked and the area to be biopsied was determined., Results: The malignancy detection rate was significantly higher in Group B (48/50 patients, 96%) than in Group A (36/50 patients, 72%, p=0.001). Two lesions in the Group B (4 %) and 14 lesions in the Group A (28 %) were found to give benign results (p=0.001). Biopsy was repeated in one patient of Group B, and in five patients of Group A due to an initial negative diagnosis. The sensitivity of PET/CT in predicting malignant tumor was 96%, with the positive predictive value (PPV) of 98.0%; while the sensitivity of CT was 74.5%, with PPV of 82%., Conclusion: Transthoracic biopsies taken by considering metabolically active areas of the mass in positron emission tomography-guided can both increase diagnosis rate and reduce the complication rate by preventing repeated biopsies. Key Words: Transthoracic biopsy, PET/CT, Metabolic active lesion, Malignant tumor.

Objective: To determine the association of alpha-1 antitrypsin deficiency (AATD) in patients diagnosed with primary spontaneous pneumothorax (PSP), the presence of the SERPINA 1 gene, and the phenotype in patients with low enzyme values., Study Design: Cross-sectional descriptive study., Place and Duration of Study: Kayseri City Training and Research Hospital, Turkey, from October 2019 to October 2020., Methodology: A total of 42 patients with PSP and 42 healthy volunteers were included in the study. The antitrypsin (AAT) level of all participants was measured by the ELISA method. Presence of SERPINA 1 gene was determined in all the participants and its phenotype variants., Results: In this study, AAT level was statistically and significantly lower in the patient group than the control group (p = 0.018). The presence of the SERPINA 1 gene was studied in 13 (31%) patients with AATD and 7 (16.7%) healthy volunteers. Six patients had PI M1V variant (37.5%), five patients had PI M1A variant (31.3%), four patients had PI M4 variant (25%), and one patient had an indeterminate variant (6.2%). Four healthy volunteers had PI M1V variant (66.7%), and two healthy volunteers had PI M4 variant (33.3%)., Conclusion: AAT level was found to be lower in the patient group compared to the control group. In addition, the effect of SERPINA 1 gene on PSP development was found to be benign. AATD is an effective factor in the development of PSP. Key Words: Primary spontaneous pneumothorax, Alpha 1 antitrypsin deficiency, Genotype variants, SERPINA 1 gene.

Objective: To determine the risk factors for spontaneous pneumomediastinum (SPM), its clinical course and effect on prognosis in patients with Coronavirus disease-19 (COVID-19) pneumonia., Study Design: Descriptive study., Place and Duration of Study: Kayseri City Training and Research Hospital, Turkey, from April  to September 2020., Methodology: All COVID-19 patients' clinical, laboratory, and radiologic characteristics, as well as treatment outcome data, were obtained through medical record extraction. Group A had 50 patients (22 men and 28 women) without SPM, and Group B had 20 patients (10 men and 10 women) with SPM., Results: Considering the accompanying comorbidities, the frequencies of asthma and inhaler-use was significantly higher in Group B than in Group A (p <0.05). In the CT evaluation at presentation, the rate of involvement of all five lobes of the lung in Group B was significantly higher than in Group A. Rates of tube thoracostomy, mechanical ventilator requirement, length of stay in hospital, and exitus were significantly higher in Group B than in Group A (p <0.05)., Conclusion: SPM development in a patient with COVID-19 pneumonia is a sign that the prognosis will not be good, and these patients need a more aggressive treatment. Key Words: Spontaneous pneumomediastinum, COVİD-19, Pneumothorax, Real-time polymerase chain reaction, Subcutaneous emphysema.

Chylothorax is the accumulation of chyle in the pleural cavity due to obstruction or injury arising in the thoracic duct or its large branches. In more than 50% of patients diagnosed with chylothorax, the etiology consists of malignant diseases; and among these, lymphomas are the most common cause, accounting for 60% of cases. We report a case of a 37-year male with T-cell lymphoma who presented with bilateral pleural effusion; pleural fluid analysis confirmed chylothorax. A solid lymph node was detected in the left zone 4 on neck ultrasonography. Tru-cut biopsy was done and reported as T-cell lymphoma. The cytology was consistent with Class V (Malignant) T-cell lymphoma infiltration. Bilateral chylothorax, a complication of T-cell lymphoma, is a rare presentation of this disease. Our patient was diagnosed rapidly with both chylothorax and lymphoma. We started the treatment immediately and saved his life. Key Words: Chyle, Chylothorax, Lymphoma.

Objective: In this study, we aimed to draw attention to traumatic pulmonary pseudocysts, which are rare cavitary lesions resulting from thoracic trauma, and review the diagnostic and therapeutic approaches and results., Methods: Between January 2014 and January 2017, 30 patients included in this study who were diagnosed with traumatic pulmonary pseudocysts, from 582 patients who were admitted to our hospital with blunt thoracic trauma. To obtain data from the hospital information management system of patients included in this study, permission was obtained from the medical specialization board and the data were analyzed retrospectively., Results: The mean age of the patients with traumatic pulmonary pseudocysts was 40.8 years (range, 7-75 years), and 11 (36.7%) of the patients were under the age of thirty and 19 (63.3%) were over the age of thirty. Twenty-eight (93.3%) patients had lung contusion and among those who had traumatic pulmonary pseudocysts diameter less than 2 cm, in 10 (33.3%) patients, contusion was present. In 27 patients, TPP was seen in thoracic computed tomography and diagnosed in the first 12 hours, but only in 10 of these patients, traumatic pulmonary pseudocysts was seen on chest x-ray. The extrathoracic injury was found in 15 (50%) patients. Twenty-two (73.3%) patients underwent tube thoracostomy. No patient required a thoracotomy., Conclusion: Traumatic pneumatoceles are benign lesions and most of them regress with symptomatic treatment and supportive therapy without any specific treatment., Competing Interests: Conflict of Interest: No conflict of interest was declared by the authors., (Copyright: © 2021 by Istanbul Northern Anatolian Association of Public Hospitals.)

Although there are a lot of data on intrathoracic and extrathoracic injuries associated with adult sternal fractures and how to manage them; but there is not much data on diagnosis and treatment protocols, since they are rare in children. If the child patient has a sternal fracture, he/she probably had a high-energy trauma, so it should be carefully examined whether if there is an accompanying intrathoracic or extrathoracic injury. In this study, we aimed to determine the demographic data, accompanying injuries, treatment modalities and results in children who were admitted to the emergency trauma unit of our hospital and diagnosed with sternal fracture.

Although the intrathoracic location is common for hydatid cyst, chest-wall, mediastinal, pericardial, myocardial, fissural and pleural-space locations have been reported. The incidence of mediastinal involvement is 0.1-0.5%. Here in this paper, two cases of mediastinal hydatid cysts are reported. Both of them had anterior mediastinal hydatidosis, while one of the patients had also additional three pericardial hydatid cysts. They have undergone thoracotomy for the removal of cystic lesions. Hydatid cysts should be considered in the differential diagnosis of mediastinal cystic lesions especially in the endemic regions. Surgical removal is the treatment of choice for mediastinal hydatid cysts, and additional medical therapy may avoid recurrence.

Hydatid cyst has a predilection to locate in liver, lungs, and brain. Intrathoracic extrapulmonary locations are generally the mediastinum, pleura, pericardium and chest wall. Pleural involvement usually follows the rupture of a pulmonary or hepatic cyst inside the pleural space causing secondary pleural hydatidosis. Radiological investigations of a patient suffering from cough and dyspnea revealed multiple cysts located in the posterior lower right hemithorax, and implanted in the diaphragmatic pleura and parietal pleura lining the chest wall. He had undergone two hepatic hydatid cystectomy operations. These multiple cysts were removed by thoracotomy. The possibility of secondary pleural dissemination should be considered in patients with lobulated cystic masses as well as a previous hepatic cystic hydatid disease.