Đánh giá hiệu quả sinh thiết u phổi xuyên thành ngực bằng kim dưới hướng dẫn CT-scan

TÓM TẮT Mục tiêu: Xác định độ chính xác và tỉ lệ tai biến của phương pháp sinh thiết u phổi xuyên thành ngực bằng kim dưới hướng dẫn CTscan. Phương pháp và đối tượng: Hồi cứu, mô tả các bệnh nhân được sinh thiết u phổi xuyên thành ngực bằng kim dưới hướng dẫn CTscan tại bệnh viện Bình Dân từ 3/2019 đến hết 12/2019. Kết quả: Tổng số mẫu là 57 bệnh nhân, nam gần gấp đôi nữ, tuổi trung bình 60,7. Phần lớn bệnh nhân tình cờ phát hiện u phổi (78,9%). U phổi bên phải nhiều hơn bên trái. Kết quả sinh thiết: Ung thư 57,9%; viêm 35,1% và lao 7%. Các trường hợp kết quả sinh thiết là lao: phù hợp với bệnh cảnh lâm sàng, hình ảnh học và được chẩn đoán xác định bởi bác sĩ chuyên khoa lao - Bệnh viện Phạm Ngọc Thạch. Các trường hợp kết quả sinh thiết là viêm: kết quả phẫu thuật là lao 50%, ung thư 20%, viêm 20%. Các trường hợp kết quả sinh thiết là ung thư: so sánh với kết quả phẫu thuật chúng tôi nhận thấy độ nhạy trong phát hiện ung thư phổi của sinh thiết là 85,7%; độ đặc hiệu 100%; giá trị tiên đoán dương 100% và giá trị tiên đoán âm 80%. Tỉ lệ tai biến 21,1% gồm tràn khí màng phổi 12,3%, ho ra máu 7% và tụ máu nhu mô phổi 1,8%. Tỉ lệ tràn khí màng phổi cần dẫn lưu màng phổi cấp cứu là thấp (3,5%). Kết luận: Phương pháp sinh thiết u phổi xuyên thành ngực bằng kim dưới hướng dẫn CTscan khả thi, hiệu quả cao và tương đối an toàn, vì vậy có vai trò quan trọng trong chẩn đoán u phổi. ABSTRACT EVALUATE THE EFFECTIVENESS OF COMPUTED TOMOGRAPHY - GUIDED TRANSTHORACIC CORE NEEDLE BIOPSY OF PULMONARY TUMORS Objectives: The present study aims to determine the diagnostic accuracy of computed tomography (CT) - guided transthoracic core needle biopsy of pulmonary tumorsand the complications of the procedure. Methods: A retrospective descriptive studywas carried out in a series of patients with pulmonary tumors diagnosed by CT - guided transthoracic core needle biopsy at Binh Dan Hospital between 3/2019 and 12/2019. Results: The total sample was 57 patients with an average age was 60.7, male/female = 1.85. Most of the patients were detected lung tumors incidentally (78.9%), and right-side tumors were more than the left - side tumors. Biopsy results included cancer, inflammation, and tuberculosis, with incidence rates were 57.9%, 35.1%, and 7%, respectively. The cases, which were confirmed tuberculosis on biopsy results, were determined tuberculosis by a specialist who worked in Pham Ngoc Thach Hospital. The patients had inflammatory results and were operated on, which had surgical outcomes were tuberculosis (50%), cancer (20%), and inflammation (20%). The cases, which were confirmed cancer on biopsy results after comparing with surgical outcome, found that the biopsy of detecting lung cancer had 85.7% sensitivity, 100% specificity, 100% positive predictive value, and 80% negative predictive value. The rate of complications was 21.1%, including pneumothorax (12.3%), hemoptysis (7%), and pulmonary parenchymal hematoma (1.8%). The rate of pneumothorax requiring emergency pleural drainage was low (3.5%). Conclusions: CT - guided transthoracic core needle biopsy is feasible, highly effective, and relatively safe; therefore, it plays an important role in diagnosing lung tumors. Keywords: Lung tumor, tuberculosis (TB), lung cancer, core biopsy

Assessment and Prognostic Value of Immediate Changes in Post-Ablation Intratumor Density Heterogeneity of Pulmonary Tumors via Radiomics-Based Computed Tomography Features

ObjectivesTo retrospectively observe the instantaneous changes in intratumor density heterogeneity after microwave ablation (MWA) of lung tumors and to determine their prognostic value in predicting treatment response and local tumor progression (LTP).MethodsPre- and post-MWA computed tomography (CT) images of 50 patients (37-males; 13-females; mean-age 65.9 ± 9.7y, 39 primary and 11 metastasis) were analyzed to evaluate changes in intratumor density. Global, regional, and local scale radiomics features were extracted to assess intratumor density heterogeneity. In four to six weeks, chest enhanced CT was used as the baseline evaluation of treatment response. The correlations between the parametric variation immediately after ablation and the visual score of ablation response (Rvisu) were analyzed by nonparametric Spearman correlation analysis. The 1-year LTP discrimination power was assessed using the area under the receiver operating characteristic (ROC) curves. A Cox proportional hazards regression model was used to identify the independent prognostic features.ResultsAlthough no significant volume changes were observed after ablation, the radiomics parameters changed in different directions and degrees. The mean intensity value from baseline CT image was 30.3 ± 23.2, and the post-MWA CT image was -60.9 ± 89.8. The ratio of values change was then calculated by a unified formulation. The largest increase (522.3%) was observed for cluster prominence, while the mean CT value showed the largest decline (321.4%). The pulmonary tumors had a mean diameter of 3.4 ± 0.8 cm. Complete ablation was documented in 36 patients. Significant correlations were observed between Rvisu and quantitative features. The highest correlations were observed for changes in local features after MWA, with r ranging from 0.594 to 0.782. LTP developed in 22 patients. The Cox regression model revealed Δcontrast% and response score as independent predictors (Δcontrast%: odds ratio [OR]=5.61, p=0.001; Rvisu: OR=1.73, p=0019). ROC curve analysis showed that Δcontrast% was a better predictor of 1-year LTP. with higher sensitivity (83.5% vs. 71.2%) and specificity (87.1% vs. 76.8%) than those for Rvisu.ConclusionsThe changes in intratumor density heterogeneity after MWA could be characterized by analysis of radiomics features. Real-time density changes could predict treatment response and LTP in patients with pulmonary tumors earlier, especially for tumors with larger diameters.

Perspectives of stereotactic radiotherapy in primary and oligo-metastatic pulmonary tumors

Lung cancer (LC) is a common malignant neoplasm (MN) with high lethality, often detected at late stages. The implementation of lung cancer screening can change the ratio in favor of the early stages. Screening could help diagnose early-stage LC in 60% of patients. Multiple primary LCs occur in 4–10% of patients within five years after treatment. The presence of oligo-metastatic disease only in the lungs (up to 5 nodules) occurs in 6-40% of patients with malignant tumors, and complete resection could increase 5-year survival to 20-40%. Due to functional limitations, surgical treatment can be performed only in 65-70% of patients. Stereotactic radiation therapy gives an opportunity to accurately deliver a high dose of radiation to the tumor with minimal damage to the surrounding healthy tissues. Local control is possible in 85–95% of cases, and 3-year overall survival is about 60–80%. New algorithms for fractionation and dose determination (BED10 ≥ 100 Gy) could improve the treatment results for early-stage lung cancer and oligometastatic lesions. In this non-systematic review, we analyze a recent publication and our own experience. We consider the effectiveness and safety of stereotactic radiotherapy and planning, modeling, fractionation, dose restrictions on critical organs, radiation reactions, and adverse events. We conclude that randomized controlled trials can reveal the stereotactic radiation therapy's potential in patients with primary and oligo-metastatic pulmonary tumors.

Multimodale Bronchoskopie in der Rundherddiagnostik: Gewinnbringende Kombinationen ausloten

There are cases of peripheral lung nodules that are difficult to approach despite using ancillary diagnostic devices during multimodal bronchoscopy. The use of ultrathin bronchoscopes has shown superiority over standard thin bronchoscopes. We retrospectively evaluated whether substitution of the thin-bronchoscope by the ultrathin device during multimodal bronchoscopy improves lesion ultrasound visualization and diagnostic yield in patients with difficult-to-approach pulmonary lesions. The study comprised 44 out of 338 patients that underwent multimodal bronchoscopy at Matsusaka Municipal Hospital. The thin-bronchoscope with an external diameter of 4 mm was substituted by the ultrathin-bronchoscope with an external diameter of 3 mm when the radial endobronchial ultrasound showed that the probe position was not within the target lesion. The median diameter of the pulmonary tumors was 17.5 mm (range: 6.0–5.2.0 mm). The endobronchial ultrasound showed the probe’s position adjacent to the lesion in 12 cases and no visible lesion in 32 cases using a thin-bronchoscope. However, the endobronchial ultrasound views changed from adjacent to the lesion to within the lesion in nine cases, from no visible lesion to within the lesion in 17 cases, and from no visible lesion to adjacent to the lesion in nine cases after bronchoscope substitution. After substitution, the diagnostic yield was 80.8% in cases with the radial probe within the target lesion, 72.7% in cases with the probe adjacent to the target lesion, and 0% in cases with no visible lesion. The overall diagnostic yield was 65.9% after bronchoscope substitution. The substitution of the thin bronchoscope by the ultrathin device on a need basis improves the position of the radial endobronchial ultrasound probe and diagnostic yield of pulmonary lesions during multimodal diagnostic bronchoscopy.

Rare pulmonary tumors and carcinoma mimickers; experience from an interventional radiology unit with radiologic-pathologic correlation-A pictoral essay

Background: Although imaging findings along with patients’ clinical history may give clue for the etiology of a pulmonary lesion, the differentiation of benign pulmonary lesions from lung cancer could be challenging. Objective: The aim of this review article was to increase the awareness of the carcinoma mimicking lung lesions. Methods: This paper was designed to illustrate rare pulmonary tumors and carcinoma mimickers with emphasis on radiologic-pathologic correlation. Pitfalls encountered on CT images and also false positivity of PET-CT scans were also presented. Conclusion: Several benign pulmonary lesions may grow in size on follow-up and some may show pathologic FDG (18F-fluorodeoxyglucose) uptake, which makes them indistinguishable from lung carcinoma by imaging. In addition, some slow-growing malignant lesions, such as carcinoid, may be false-negative on PET/CT scans.

Pulmonary Sarcomatoid Carcinoma Associated with Arterial Thromboembolism in a Cat

A 14-year-old, neutered male domestic shorthair cat presented for acute monoparesis with physical exam findings and biochemical data supportive of a distal arterial thromboembolism. Thoracic radiographs revealed an alveolar pattern in the right middle lung lobe and multifocal nodules in other lung lobes. A pulmonary mass was found on necropsy, which was composed of both carcinomatous and sarcomatous components, confirmed with cytokeratin and vimentin immunohistochemistry. Using the World Health Organization classification scheme for mixed pulmonary tumors, this tumor would be characterized as a pleomorphic squamous cell carcinoma under the umbrella term of pulmonary sarcomatoid carcinoma. The World Health Organization classification of mixed pulmonary tumors and its application to previously reported mixed pulmonary tumors in companion animals is discussed. This is the first reported case of this tumor type in a cat, as well as the first report of this tumor type associated with an arterial thromboembolism in any veterinary species.

Initial experience of virtual-assisted lung mapping utilizing both indocyanine green and indigo carmine

Virtual-assisted lung mapping is a bronchoscopic multiple dye marking technique that facilitates sublobar lung resections for unidentifiable pulmonary tumors. Marking failure reportedly occurs in 10% of cases. To overcome this limitation, we developed indocyanine green virtual-assisted lung mapping that uses indocyanine green in addition to indigo carmine. Here, we report our initial experience of indocyanine green virtual-assisted lung mapping.

Surgical tactics for benign bronchial and lung tumors

Aim: to identify the efficient surgical tactics in case of benign broncho-pulmonary tumors taking into account co-morbidities and possibilities of video-assisted thora- cic operations. Materials and methods. Among 133 pa- tients with benign tumors of the lungs and bronchi 128 (96%) had tumors of peripheral localization, 5 (4%) — of the central one. All patients with peripheral tumors were operated on. Charlson index was used to assess the co-morbidity. Results. In 120 (90.2%) patients tumors were diagnosed during routine Х-ray examination or casual check-up.6 (4.5%) patients showed clinical symp- toms. The average terms of observation of patients with peripheral tumors were 7.8 months (Me — 6, Q1 — 2, Q3 — 7), with the central ones — 13.3 months (Me — 5, Q1 — 3, Q3 — 8). In 4 cases central tumors were removed by endoscopy methods using electroresection and argon plasma coagulation. In one case a stent was inserted. More than 2/3 of patients had co-morbid pathologies. Charlson index in co-morbid patients was 2.4±1.4, in the group of patients elder than 70 years — 4.8±0.9. All patients with peripheral tumors were operated on. The video thoracoscopy approach was used in 56 (42.1%) pa- tients, thoracotomy — in 67 (50.4%), video-assisted mi- nithoracotomy — in 6 (4.5%). In 5.2% of cases thoracosco- py was converted to thoracotomy. All peripheral tumors were mesenchymal ones. Post-operative complications developed in 7 (5.5%) patients. There were no mortality. Conclusion. Peripheral benign tumors of the lungs are asymptomatic and require urgent surgery with an express histology test to rule out lung cancer. Central tumors are mostly removed by endoscopy. Video thoracoscopy is the most efficient method to remove peri pheral tumors. Conversion to thoracotomy is usually necessary in case of a small size and deep tumor localization.

Use of Ultrathin Bronchoscope on a Need Basis Improves Diagnostic Yield of Difficult-to-Approach Pulmonary Lesions

There are cases of peripheral lung nodules that are difficult to approach despite using ancillary diagnostic devices during multimodal bronchoscopy. The use of ultrathin bronchoscopes has shown superiority over standard thin bronchoscopes. We retrospectively evaluated whether substitution of the thin-bronchoscope by the ultrathin device during multimodal bronchoscopy improves lesion ultrasound visualization and diagnostic yield in patients with difficult-to-approach pulmonary lesions. The study comprised 44 out of 338 patients that underwent multimodal bronchoscopy at Matsusaka Municipal Hospital. The thin-bronchoscope with an external diameter of 4 mm was substituted by the ultrathin-bronchoscope with an external diameter of 3 mm when the radial endobronchial ultrasound showed that the probe position was not within the target lesion. The median diameter of the pulmonary tumors was 17.5 mm (range: 6.0–5.2.0 mm). The endobronchial ultrasound showed the probe's position adjacent to the lesion in 12 cases and no visible lesion in 32 cases using a thin-bronchoscope. However, the endobronchial ultrasound views changed from adjacent to the lesion to within the lesion in nine cases, from no visible lesion to within the lesion in 17 cases, and from no visible lesion to adjacent to the lesion in nine cases after bronchoscope substitution. After substitution, the diagnostic yield was 80.8% in cases with the radial probe within the target lesion, 72.7% in cases with the probe adjacent to the target lesion, and 0% in cases with no visible lesion. The overall diagnostic yield was 65.9% after bronchoscope substitution. The substitution of the thin bronchoscope by the ultrathin device on a need basis improves the position of the radial endobronchial ultrasound probe and diagnostic yield of pulmonary lesions during multimodal diagnostic bronchoscopy.