1.Outcomes of Pulmonary Resection and Mediastinal Node Dissection by Video-Assisted Thoracoscopic Surgery Following Neoadjuvant Chemoradiation Therapy for Stage IIIA N2 Non-Small Cell Lung Cancer
Yeong Jeong JEON ; Yong Soo CHOI ; Kyung Jong LEE ; Se Hoon LEE ; Hongryull PYO ; Joon Young CHOI
The Korean Journal of Thoracic and Cardiovascular Surgery 2018;51(1):29-34
BACKGROUND: We evaluated the feasibility and outcomes of pulmonary resection and mediastinal node dissection (MND) by video-assisted thoracoscopic surgery (VATS) following neoadjuvant therapy for stage IIIA N2 non-small cell lung cancer (NSCLC). METHODS: From November 2009 to December 2013, a total of 35 consecutive patients with pathologically or radiologically confirmed stage IIIA N2 lung cancer underwent pulmonary resection and MND, performed by a single surgeon, following neoadjuvant chemoradiation. Preoperative patient characteristics, surgical outcomes, postoperative drainage, postoperative complications, and mortality were retrospectively analyzed. RESULTS: VATS was completed in 17 patients. Thoracotomy was performed in 18 patients, with 13 planned thoracotomies and 5 conversions from the VATS approach. The median age was 62.7±7.9 years in the VATS group and 60±8.7 years in the thoracotomy group. The patients in the VATS group tended to have a lower diffusing capacity for carbon monoxide (p=0.077). There were no differences between the 2 groups in the method of diagnosing the N stage, tumor response and size after induction, tumor location, or histologic type. Complete resection was achieved in all patients. More total and mediastinal nodes were dissected in the VATS group than in the thoracotomy group (p < 0.05). The median chest tube duration was 5.3 days (range, 1 to 33 days) for the VATS group and 7.2 days (range, 2 to 28 days) for the thoracotomy group. The median follow-up duration was 36.3 months. The 5-year survival rates were 76% in the VATS group and 57.8% in the thoracotomy group (p=0.39). The 5-year disease-free survival rates were 40.3% and 38.9% in the VATS and thoracotomy groups, respectively (p=0.8). CONCLUSION: The VATS approach following neoadjuvant treatment was safe and feasible in selected patients for the treatment of stage IIIA N2 NSCLC, with no compromise of oncologic efficacy.
Carbon Monoxide
;
Carcinoma, Non-Small-Cell Lung
;
Chest Tubes
;
Disease-Free Survival
;
Drainage
;
Follow-Up Studies
;
Humans
;
Lung Neoplasms
;
Methods
;
Mortality
;
Neoadjuvant Therapy
;
Postoperative Complications
;
Retrospective Studies
;
Survival Rate
;
Thoracic Surgery, Video-Assisted
;
Thoracotomy
2.Nonintubated Uniportal Video-Assisted Thoracoscopic Surgery: A Single-Center Experience.
Seha AHN ; Youngkyu MOON ; Zeead M. ALGHAMDI ; Sook Whan SUNG
The Korean Journal of Thoracic and Cardiovascular Surgery 2018;51(5):344-349
BACKGROUND: We report our surgical technique for nonintubated uniportal video-assisted thoracoscopic surgery (VATS) pulmonary resection and early postoperative outcomes at a single center. METHODS: Between January and July 2017, 40 consecutive patients underwent nonintubated uniportal VATS pulmonary resection. Multilevel intercostal nerve block was performed using local anesthesia in all patients, and an intrathoracic vagal blockade was performed in 35 patients (87.5%). RESULTS: Twenty-nine procedures (72.5%) were performed in patients with lung cancer (21 lobectomies, 6 segmentectomies, and 2 wedge resections), and 11 (27.5%) in patients with pulmonary metastases, benign lung disease, or pleural disease. The mean anesthesia time was 166.8 minutes, and the mean operative duration was 125.9 minutes. The mean postoperative chest tube duration was 3.2 days, and the mean hospital stay was 5.8 days. There were 3 conversions (7.5%) to intubation due to intraoperative hypoxemia and 1 conversion (2.5%) to multiportal VATS due to injury of the segmental artery. There were 7 complications (17.5%), including 3 cases of prolonged air leak, 2 cases of chylothorax, 1 case of pleural effusion, and 1 case of pneumonia. There was no in-hospital mortality. CONCLUSION: Nonintubated uniportal VATS appears to be a feasible and valid surgical option, depending on the surgeon’s experience, for appropriately selected patients.
Anesthesia
;
Anesthesia, Local
;
Anoxia
;
Arteries
;
Chest Tubes
;
Chylothorax
;
Hospital Mortality
;
Humans
;
Intercostal Nerves
;
Intubation
;
Ion Transport*
;
Length of Stay
;
Lung Diseases
;
Lung Neoplasms
;
Mastectomy, Segmental
;
Minimally Invasive Surgical Procedures
;
Neoplasm Metastasis
;
Pleural Diseases
;
Pleural Effusion
;
Pneumonia
;
Thoracic Surgery
;
Thoracic Surgery, Video-Assisted*
3.Impact of Chronic Obstructive Pulmonary Disease on Risk of Recurrence in Patients with Resected Non-small Cell Lung Cancer.
Guangliang QIANG ; Qiduo YU ; Chaoyang LIANG ; Zhiyi SONG ; Bin SHI ; Yongqing GUO ; Deruo LIU
Chinese Journal of Lung Cancer 2018;21(3):215-220
BACKGROUND:
Lung cancer and chronic obstructive pulmonary disease (COPD) are both common diseases in respiratory system and the leading causes of deaths worldwide. The purpose of this study was to determine whether the severity of COPD affects long-term survival in non-small cell lung cancer (NSCLC) patients after surgical resection.
METHODS:
A retrospective research was performed on 421 consecutive patients who had undergone lobectomy for NSCLC. Classification of COPD severity was based on guidelines of the Global Initiative for Chronic Obstructive Lung Disease (GOLD). Characteristics among the three subgroups were compared and recurrence-free survivals were analyzed.
RESULTS:
A total of 172 patients were diagnosed with COPD, 124 as mild (GOLD-1), 46 as moderate(GOLD-2), and 2 as severe (GOLD-3). The frequencies of recurrence were significantly higher in higher COPD grades group (P<0.001). Recurrence-free survival at five years were 78.1%, 70.4%, and 46.4% in Non-COPD, GOLD-1 COPD, and GOLD-2/3 COPD groups, respectively (P<0.001). In univariate analysis, age, gender, smoking history, COPD severity, tumor size, histology and pathological stage were associated with recurrence-free survival. Multivariate analyses showed that older age, male, GOLD-2/3 COPD, and advanced stage were independent risk factors associated with recurrence-free survival.
CONCLUSIONS
NSCLC patients with COPD are at higher risk for postoperative recurrence, and moderate/severe COPD is an independent unfavorable prognostic factor. The severity of COPD based on pulmonary function test can be a useful indicator to identify patients at high risk for recurrence. Therefore, it can contribute to adequate selection of the appropriate individualized treatment.
Adult
;
Aged
;
Aged, 80 and over
;
Carcinoma, Non-Small-Cell Lung
;
complications
;
mortality
;
physiopathology
;
surgery
;
Female
;
Humans
;
Lung Neoplasms
;
complications
;
mortality
;
physiopathology
;
surgery
;
Male
;
Middle Aged
;
Multivariate Analysis
;
Pulmonary Disease, Chronic Obstructive
;
complications
;
mortality
;
physiopathology
;
Respiratory Function Tests
;
Retrospective Studies
4.Exploration of Postoperative Follow-up Strategies for Early Staged NSCLC Patients on the Basis of Follow-up Result of 416 Stage I NSCLC Patients after Lobectomy.
Liang DAI ; Wanpu YAN ; Xiaozheng KANG ; Hao FU ; Yongbo YANG ; Haitao ZHOU ; Zhen LIANG ; Hongchao XIONG ; Yao LIN ; Keneng CHEN
Chinese Journal of Lung Cancer 2018;21(3):199-203
BACKGROUND:
Currently, there is no consensus on the follow-up strategy (follow-up time interval and content) of non-small cell lung cancer (NSCLC) in the world, and the relevant clinical evidence is also very limited. In this study, we aimed to summarize the recurrence/metastasis sites and timings of stage I NSCLC patients based on their follow-up data, aiming to provide a basis of follow-up time interval and content for this group of patients.
METHODS:
We retrospectively analyzed the 416 stage I NSCLC patients that underwent continuous anatomic lobectomy between Jan. 2000 to Oct. 2013 in our prospective lung cancer database. According to the recurrence/metastasis sites and timings, the long term follow-up time interval and content were explored.
RESULTS:
The 5-yr disease free survival (DFS) and overall survival (OS) in the whole group were 82.4% and 85.4%, respectively. There were 76 cases (18.3%) had recurrence/metastasis during follow-up, among which the most frequent site was pulmonary metastasis (21 cases, 5.0%), followed by brain metastasis (20 cases, 4.8%), bone metastasis (12 cases, 2.9%), and mediastinal lymph node metastasis (12 cases, 2.9%). Among the factors that could influence recurrence/metastasis, patients with pT2a suffered from a higher recurrence/metastasis rate compared to patients with pT1 (P=0.006), with 5-yr DFS being 73.8% and 87.3%, respectively (P=0.002), and the 5-yr OS being 77.7% and 90.3%, respectively (P=0.011).
CONCLUSIONS
The commonest recurrence/metastasis sites of stage I NSCLC after anatomic lobectomy are lung, brain and mediastinal lymph nodes, the risk of recurrence/metastasis within 2 years were equal to that between 3 years and 5 years. The follow-up frequencies and content within 2 years could be adjusted according to T stages.
Adolescent
;
Adult
;
Aged
;
Aged, 80 and over
;
Carcinoma, Non-Small-Cell Lung
;
mortality
;
pathology
;
surgery
;
Female
;
Follow-Up Studies
;
Humans
;
Lung Neoplasms
;
mortality
;
pathology
;
surgery
;
Lymph Nodes
;
surgery
;
Lymphatic Metastasis
;
Male
;
Middle Aged
;
Neoplasm Staging
;
Pneumonectomy
;
Prospective Studies
;
Retrospective Studies
;
Young Adult
5.Individualized Comprehensive Therapy for the Lung Cancer Patients with HIV Infection.
Chinese Journal of Lung Cancer 2018;21(4):327-332
BACKGROUND:
To observe clinical features, clinical stagings, types ofpathology, treatment options and clinical effects of patients suffer from HIV infection combined with lung cancer, and also to provide guidance for individualized comprehensive treatment of HIV combined with lung cancer.
METHODS:
Through the retrospective analysis of 53 cases of HIV merger of lung cancer patients admitted in our department, 47 cases of non-small cell lung cancer (NSCLC), 6 cases of small cell lung cancer (SCLC), 24 cases accepted surgery combined chemotherapy, 22 patients with simple chemotherapy, 7 cases give up treatment; 28 cases are in stages I-III, 25 cases are in stage IV; 24 patients received combined chemotherapy in 28 patients with stages I-III, 2 cases gave up treatment, 2 cases with severe chronic obstructive pulmonary disease (COPD) could not tolerate chemotherapy plus surgery. According to the situation of patients before highly active anti-retroviral therapy (HAART) treatment, patients who received HAART before treatment were divided into observation group (n=27), patients who did not receive HAART were divided into control group (n=19). The survival and the independent influencing factors between the two groups were analyzed.
RESULTS:
Among the 53 HIV infected cases a toal of 46 patients received treatment among 53 cases of treatment in patients with lung cancer merger of HIV, there are no differences of 1 year survival rate, 2 years survival rate between observation group and control group; patients in I-III phase 1 year survival rate was 76.0%, 2 years survival rate was 60.0%. Patients in IV phase 1 year survival rate was 13.6%, 2 years survival rate was 0%. 24 patients with surgery combined chemotherapy 1 year survival rate was 83.3%, 2 years survival rate was 62.5%; 22 cases treated with simple chemotherapy 1 year survival rate was 18.0%, 2 years survival rate was 0%.
CONCLUSIONS
HIV merger in patients with lung cancer can improve the patients survival rate after different individualized comprehensive treatment, early surgery with combined chemotherapy has remarkable effect.
Adult
;
Aged
;
Anti-HIV Agents
;
therapeutic use
;
Antineoplastic Combined Chemotherapy Protocols
;
therapeutic use
;
Antiretroviral Therapy, Highly Active
;
Female
;
HIV Infections
;
complications
;
drug therapy
;
mortality
;
Humans
;
Lung Neoplasms
;
complications
;
drug therapy
;
mortality
;
surgery
;
Male
;
Middle Aged
;
Neoplasm Staging
;
Retrospective Studies
;
Survival Rate
6.Surgical Treatment of Refractory Chest Tumors Assisted by Cardiopulmonary Bypass.
Rongying ZHU ; Shanzhou DUAN ; Wentao YANG ; Li SHI ; Fuquan ZHANG ; Yongbing CHEN
Chinese Journal of Lung Cancer 2018;21(4):313-317
BACKGROUND:
A retrospective review of the surgical treatment of refractory chest tumors involving the heart or large vessels with cardiopulmonary bypass (CPB).
METHODS:
To summarize 11 cases of chest tumor patients who had undergone cardiopulmonary bypass surgery from January 2008 to May 2017 in our hospital, and analyze the general condition, clinical characteristics, treatment methods, postoperative hospitalization time, complications and follow-up results of all patients.
RESULTS:
All 11 patients were operated with cardiopulmonary bypass. Total resection of tumors in 8 cases and most of the excision in 3 cases. 1 case of left atrial metastatic leiomyosarcoma were excised in the left atrium, and then the right lung resection was performed. 1 case of left lung central lung cancer resection through the median sternum incision. 2 cases underwent pulmonary artery repair at the same time, 3 cases underwent partial pericardiectomy and 3 cases underwent pulmonary wedge resection at the same time. All the patients were effectively relieved after the operation. No death rate in hospital and 30 days after operation. 3 cases of postoperative pulmonary infection were recovered after the treatment of antibiotics. 1 case of lymphoma relapsed 6 months after surgery and died one year later. 1 case of pericardial fibrosarcoma had local recurrence and extensive metastasis at 13 months after operation, and died after 15 months. 1 case of pulmonary leiomyosarcoma were found to have local recurrence 15 months after the operation and were relieved after chemotherapy. The remaining 8 patients survived, and no obvious recurrence and distant metastasis were found in the computed tomography (CT) examination.
CONCLUSIONS
The CPB assisted surgical treatment can be performed for patient of refractory chest tumors involving the heart or large vessels. It can improve the surgical resection rate of refractory chest tumors, effectively alleviate the effects on respiratory and circulatory functions, and significantly prolong the survival period of these patients.
Adult
;
Cardiopulmonary Bypass
;
adverse effects
;
Female
;
Humans
;
Lung Neoplasms
;
diagnostic imaging
;
mortality
;
physiopathology
;
surgery
;
Male
;
Middle Aged
;
Postoperative Complications
;
etiology
;
Pulmonary Artery
;
diagnostic imaging
;
physiopathology
;
surgery
;
Retrospective Studies
7.Observation - An Favorable Option Forthoracic Dissemination Patients with Lung Adenocarcinoma or Squamous Carcinoma.
Ying CHEN ; Wei LI ; Wenfang TANG ; Xuening YANG ; Wenzhao ZHONG
Chinese Journal of Lung Cancer 2018;21(4):303-309
BACKGROUND:
Surgery was not standard-of-care of patients with advanced lung cancer. However, a serial of retrospective studies demonstrated that thoracic dissemination (M1a) patients could benefit from contraindicated surgery. After non-standard treatment, how should these patients choose following treatment approaches? Herein, we conducted this retrospective study to explore subsequent optimal treatment approaches.
METHODS:
Different therapeutic approaches were evaluated by comparing progression-free survival (PFS), overall survival (OS), time to treatment interval (TTI) using the Kaplan-Meier method and Log-rank test. A Cox proportional hazards regression model was used for multivariate analysis.
RESULTS:
141 eligible were enrolled. The median PFS of chemotherapy group, targeted therapy group and observation group were 14.7, 41.0 and 31.0 months, respectively (95%CI: 19.01-26.01; P<0.001). There was no significantly statistically difference between median PFS of targeted group and observation group (P=0.006). The median OS were 39.0, 42.6 and 38.1 months (95%CI: 32.47-45.33; P=0.478). The median PFS and OS of TTI<3 months and TTI ≥3 months were 15.2 months versus 31.0 months (95%CI: 19.01-26.06; P<0.001) and 41.7 months versus 38.7 months (95%CI: 32.47-45.33; P=0.714). Multivariate analyses revealed gender (P=0.027), lymph node status (P=0.036) and initial therapy (P<0.001) were independent prognostic factors for PFS.
CONCLUSIONS
Observation did not shorten survival of thoracic dissemination patients with lung adenocarcinoma or squamous carcinoma, therefore, it could be an favorable option. But prospective randomized controlled study was needed to confirm its validity.
Adenocarcinoma
;
drug therapy
;
mortality
;
pathology
;
surgery
;
Adenocarcinoma of Lung
;
Adult
;
Aged
;
Aged, 80 and over
;
Antineoplastic Combined Chemotherapy Protocols
;
therapeutic use
;
Carcinoma, Squamous Cell
;
drug therapy
;
mortality
;
pathology
;
surgery
;
Disease-Free Survival
;
Female
;
Humans
;
Lung Neoplasms
;
drug therapy
;
mortality
;
pathology
;
surgery
;
Male
;
Middle Aged
;
Neoplasm Staging
;
Retrospective Studies
;
Young Adult
8.Efficacy of Single-Port Video-Assisted Thoracoscopic Surgery Lobectomy Compared with Triple-Port VATS by Propensity Score Matching.
Kyung Sub SONG ; Chang Kwon PARK ; Jae Bum KIM
The Korean Journal of Thoracic and Cardiovascular Surgery 2017;50(5):339-345
BACKGROUND: In recent years, single-port video-assisted thoracoscopic surgery (VATS) for lobectomy in non-small cell lung cancer (NSCLC) patients has become increasingly common. The objective of this study was to compare the feasibility and safety of single-port and triple-port VATS lobectomy. METHODS: A total of 73 patients with NSCLC who underwent VATS lobectomy from December 2011 to August 2016 were retrospectively reviewed, including 47 in the triple-port group and 26 in the single-port group. Statistical analysis was performed after propensity score matching. Patients were matched on a 1-to-1 basis. RESULTS: Operative time and intraoperative blood loss in the triple-port group and the single-port group were similar (189.4±50.8 minutes vs. 205.4±50.6 minutes, p=0.259; 286.5±531.0 mL vs. 314.6±513.1 mL, p=0.813). There were no cases of morbidity or mortality. No significant differences in complications or the total number of dissected lymph nodes were found between the 2 groups. In the single-port group, more mediastinal lymph nodes were dissected than in the triple-port group (1.7±0.6 vs. 1.2±0.5, p=0.011). Both groups had 1 patient with bronchopleural fistula. Chest tube duration and postoperative hospital stay were shorter in the single-port group than in the triple-port group (8.7±5.1 days vs. 6.2±6.6 days, p=0.130; 11.7±6.1 days vs. 9.5±6.4 days, p=0.226). However, the differences were not statistically significant. In the single-port group, the rate of conversion to multi-port VATS lobectomy was 11.5% (3 of 26). The rates of conversion to open thoracotomy in the triple-port and single-port groups were 7.7% and 3.8%, respectively (p=1.000). CONCLUSION: In comparison with the triple-port group, single-port VATS lobectomy showed similar results in safety and efficacy, indicating that single-port VATS lobectomy is a feasible and safe option for lung cancer patients.
Carcinoma, Non-Small-Cell Lung
;
Chest Tubes
;
Fistula
;
Humans
;
Length of Stay
;
Lung Neoplasms
;
Lymph Nodes
;
Mortality
;
Operative Time
;
Propensity Score*
;
Retrospective Studies
;
Thoracic Surgery, Video-Assisted*
;
Thoracotomy
9.No Adverse Outcomes of Video-Assisted Thoracoscopic Surgery Resection of cT2 Non-Small Cell Lung Cancer during the Learning Curve Period.
Zeynep BILGI ; Hasan Fevzi BATIREL ; Bedrettin YILDIZELI ; Korkut BOSTANCI ; Tunç LAÇIN ; Mustafa YÜKSEL
The Korean Journal of Thoracic and Cardiovascular Surgery 2017;50(4):275-280
BACKGROUND: Video-assisted thoracoscopic surgery (VATS) anatomic lung resections are gradually becoming the standard surgical approach in early-stage non-small cell lung cancer (NSCLC). The technique is being applied in cases of larger tumors depending on the experience of the surgical team. The objective of this study was to compare early surgical and survival outcomes in patients undergoing anatomic pulmonary resections using VATS and thoracotomy techniques for clinical T2 NSCLC during the adaptation period of the surgical team to the VATS approach. METHODS: The data of all patients who underwent anatomic pulmonary resection for NSCLC using VATS and open techniques since April 2012 were recorded to create a prospective lung cancer database. Clinical T2 NSCLC patients who underwent VATS anatomic lung resection were identified and compared with cT2 patients who underwent open resection. RESULTS: Between April 2012 and August 2014, 269 anatomical resections for NSCLC were performed (80 VATS and 189 thoracotomy). Thirty-four VATS patients who had clinical T2 disease were identified and stage-matched to thoracotomy patients. The average tumor diameter was comparable (34.2±11.1×29.8±10.1 mm vs. 32.3±9.8×32.5±12.2 mm, p=0.4). Major complications were higher in the thoracotomy group (n=0 vs. n=5, p=0.053). There was no 30-day mortality, and the 2-year survival rate was 91% for VATS and 82% for thoracotomy patients (p=0.4). CONCLUSION: VATS anatomic resections in clinical T2 NSCLC tumors are safe and have perioperative and pathologic outcomes similar to those of thoracotomy, while remaining within the learning curve.
Carcinoma, Non-Small-Cell Lung*
;
Humans
;
Learning Curve*
;
Learning*
;
Lung
;
Lung Neoplasms
;
Mortality
;
Patient Safety
;
Prospective Studies
;
Survival Rate
;
Thoracic Surgery, Video-Assisted*
;
Thoracotomy
10.Value of E-PASS and mE-PASS in predicting morbidity and mortality of gastric cancer surgery.
Ningbo LIU ; Jiangong CUI ; Zengqiang ZHANG ; Zhicheng ZHAO ; Weidong LI ; Weihua FU ; Email: FUWEIHUA@TIJMU.EDU.CN.
Chinese Journal of Oncology 2015;37(10):753-758
OBJECTIVETo investigate the clinical value of Physiologic Ability and Surgical Stress (E-PASS) and modified Estimation of Physiologic Ability and Surgical Stress (mE-PASS) scoring systems in predicting the mortality and surgical risk of gastric cancer patients, and to analyze the relationship between the parameters of E-PASS and early postoperative complications.
METHODSClinical data of 778 gastric cancer patients who underwent elective surgical resection in Tianjin Medical University General Hospital from Jan. 2010 to Jan. 2014 were analyzed retrospectively. E-PASS and mE-PASS scoring systems were used to predict the mortality of gastric cancer patients, respectively. Univariate and unconditioned logistic regression analyses were performed to assess the relationships between nine parameters of E-PASS system and early postoperative complications.
RESULTSE-PASS and mE-PASS systems were used to predict the mortality in the death group and non-death group. The Z value was -5.067 and -4.492, respectively, showing a significant difference between the two groups (P<0.05). AUCs of mortality predicted by E-PASS and mE-PASS were 0.926 and 0.878 (P>0.05), and the prediction calibration of postoperative mortality showed statistically non-significant difference (P>0.05) between the E-PASS and mE-PASS prediction and actual mortality. Univariate analysis showed that age, operation time, severe heart disease, severe lung disease, diabetes mellitus, physical state index and ASA classification score are related to postoperative complications (P<0.05 for all). Unconditioned logistic regression analysis showed that severe lung disease, diabetes mellitus, ASA classification score and operation time are risk factors for early postoperative complications (P<0.05 for all).
CONCLUSIONSBoth mE-PASS and E-PASS scoring system have good consistency in the predicting postoperative mortality and actual mortality, and both are suitable for clinical application. Moreover, the mE-PASS scoring system is clinically more simple and convenient than E-PASS scoring system. Preoperative severe lung disease, diabetes mellitus, ASA classification score and operation time are independent factors affecting the early postoperative complications.
Age Factors ; Area Under Curve ; Diabetes Complications ; Elective Surgical Procedures ; Homeostasis ; Humans ; Lung Diseases ; complications ; Operative Time ; Postoperative Complications ; etiology ; mortality ; Postoperative Period ; Predictive Value of Tests ; Regression Analysis ; Retrospective Studies ; Risk Assessment ; methods ; Risk Factors ; Stomach Neoplasms ; mortality ; physiopathology ; surgery ; Stress, Physiological

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