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Nagamine H, Nakai T, Ueda T, Nakahama K, Sawa K, Yamada K, Watanabe T, Aasai K, Kawaguchi T. Tract creation with a 25-gauge needle for convex endobronchial ultrasound-guided core biopsy in intrapulmonary lesions adjacent to bronchi: three case reports. Transl Lung Cancer Res 2023; 12:2550-2557. [PMID: 38205200 PMCID: PMC10775011 DOI: 10.21037/tlcr-23-556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 11/08/2023] [Indexed: 01/12/2024]
Abstract
Background The use of endobronchial ultrasound-guided core biopsy (EBUS-CB) using forceps or cryoprobes to obtain true histological samples has improved the diagnostic yield for mediastinal and hilar lymphadenopathy. Tract creation in the bronchial wall of the central airway is primarily performed using electrocautery devices in EBUS-CB; however, their poor maneuverability and the risk of vascular injury and damage to the tip of the bronchoscope have prevented the application of EBUS-CB for diagnosing intrapulmonary lesions beyond the central locations. This report presents three cases wherein a 25-gauge transbronchial needle aspiration (TBNA) needle with high flexibility and safety was used to create a tract in the bronchial wall for EBUS-CB of the intrapulmonary lesions adjacent to the bronchi. Case Description In all cases, EBUS-TBNA using a 25-gauge TBNA needle was performed on the intrapulmonary lesions adjacent to the bronchi, followed by EBUS-CB with 1.9-mm forceps in two cases and also with a 1.1-mm cryoprobe in one case. The EBUS-TBNA specimens revealed no abnormality or only a small number of tumor cells. However, subsequent EBUS-CB, through the tract created by EBUS-TBNA, enabled the collection of a sufficient amount of histological samples with well-preserved histoarchitecture. The histological diagnosis was made via immunostaining, and multigene mutation testing was also successfully analyzed. Conclusions The use of a 25-gauge needle for creating a tract allows EBUS-CB for the intrapulmonary lesions and may allow for the collection of sufficient histological samples for biomarker analysis and tissue diagnosis.
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Affiliation(s)
- Hiroaki Nagamine
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Toshiyuki Nakai
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Takahiro Ueda
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kenji Nakahama
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kenji Sawa
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kazuhiro Yamada
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Tetsuya Watanabe
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kazuhisa Aasai
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Tomoya Kawaguchi
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
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Nagamine H, Yashiro M, Yoshimoto N, Izumi M, Sugimoto A, Nakahama K, Ogawa K, Matsumoto Y, Sawa K, Tani Y, Kaneda H, Mitsuoka S, Yamada K, Watanabe T, Aasai K, Fukumura K, Mayeda A, Kawaguchi T. RBM17 Expression Is Associated With the Efficacy of ICI Monotherapy in NSCLC With Low PD-L1 Expression. Anticancer Res 2023; 43:4663-4672. [PMID: 37772582 DOI: 10.21873/anticanres.16662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/30/2023]
Abstract
BACKGROUND/AIM Immune checkpoint inhibitors (ICIs) are currently a standard treatment tool for non-small cell lung cancer (NSCLC). RNA-binding motif protein 17 (RBM17), a splicing factor, is frequently over-expressed in NSCLC, but little is known about the role of RBM17 in the efficacy of ICIs for NSCLC. Thus, we investigated the correlation between RBM17 expression and ICI efficacy in NSCLC. PATIENTS AND METHODS Biopsy or surgical specimens were collected from patients with advanced or recurrent NSCLC who received ICI monotherapy or chemo-immunotherapy in a first-line setting. RBM17 expression was examined using immunohistochemistry. The correlation between the efficacy of ICI monotherapy or chemo-immunotherapy and RBM17 expression was evaluated. RESULTS Among the 218 cases, 115 (52.8%) cases were positive for RBM17 expression. RBM17 expression was not associated with the objective response rate (ORR) or progression-free survival (PFS) in either of the ICI monotherapy or chemo-immunotherapy groups. However, among those with a low PD-L1 expression level (PD-L1 <50%; n=86), RBM17 expression was significantly associated with a better ORR (p=0.045) and a better PFS (p<0.001) in the ICI monotherapy group, and was significantly associated with a poor ORR in the chemo-immunotherapy group (p=0.041). CONCLUSION RBM17 might be a useful predictive marker for a higher efficacy of ICI monotherapy in NSCLC patients with a low PD-L1 expression level.
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Affiliation(s)
- Hiroaki Nagamine
- Department of Respiratory Medicine, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - Masakazu Yashiro
- Molecular Oncology and Therapeutics, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan;
| | - Naoki Yoshimoto
- Department of Pulmonary Medicine, Ishikiriseiki Hospital, Higashiosaka, Japan
| | - Motohiro Izumi
- Department of Pulmonary Medicine, Bell land General Hospital, Sakai, Japan
| | - Akira Sugimoto
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kenji Nakahama
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Koichi Ogawa
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Yoshiya Matsumoto
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kenji Sawa
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Yoko Tani
- Department of Clinical Oncology, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Hiroyasu Kaneda
- Department of Clinical Oncology, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Shigeki Mitsuoka
- Department of Clinical Oncology, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kazuhiro Yamada
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Tetsuya Watanabe
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kazuhisa Aasai
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
| | - Kazuhiro Fukumura
- Division of Gene Expression Mechanism, Center for Medical Science, Fujita Health University, Toyoake, Japan
| | - Akila Mayeda
- Division of Gene Expression Mechanism, Center for Medical Science, Fujita Health University, Toyoake, Japan
| | - Tomoya Kawaguchi
- Department of Respiratory Medicine, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
- Department of Clinical Oncology, Osaka Metropolitan University, Graduate School of Medicine, Osaka, Japan
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