Hyung-Jun Kim, Jun Yeun Cho, Yeon Joo Lee, Jong Sun Park, Young-Jae Cho, Ho Il Yoon, Jin-Haeng Chung, Sukki Cho, Kwhanmien Kim, Kyung Won Lee, Jae Ho Lee, Choon-Taek Lee
Cancer Res Treat. 2019;51(4):1540-1548. Published online March 25, 2019
Purpose
Lung cancers presenting as subsolid nodule commonly have peripheral location, making the cancer-pleura relationship noteworthy. We aimed to evaluate the effect of pleural attachment and/or indentation on visceral pleural invasion (VPI) and recurrence-free survival.
Materials and Methods
Patients who underwent curative resection of lung cancer as subsolid nodules from April 2007 to January 2016 were retrospectively evaluated. They were divided into four groups according to their relationship with the pleura. Clinical, radiographical, and pathological findings were analyzed.
Results
Among 404 patients with malignant subsolid nodule, 120 (29.7%) had neither pleural attachment nor indentation, 26 (6.4%) had attachment only, 117 (29.0%) had indentation only, and 141 (34.9%) had both. VPI was observed in nodules of 36 patients (8.9%), but absent in nonsolid nodules and in those without pleural attachment and/or indentation. Compared to subsolid nodules with concurrent pleural attachment and indentation, those with attachment only (odds ratio, 0.12; 95% confidence interval [CI], 0.02 to 0.98) and indentation only (odds ratio, 0.10; 95% CI, 0.03 to 0.31) revealed lower odds of VPI. On subgroup analysis, the size of the solid portion was associated with VPI among those with pleural attachment and indentation (p=0.021). Such high-risk features for VPI were associated with earlier lung cancer recurrence (adjusted hazard ratio, 3.31; 95% CI, 1.58 to 6.91).
Conclusion
Concurrent pleural attachment and indentation are risk factors for VPI, and the odds increase with larger solid portion in subsolid nodules. Considering the risk of recurrence, early surgical resection could be encouraged in these patients.
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Purpose
We conducted a retrospective analysis to determine if adjuvant chemotherapy prolongs overall survival in patients with pathologic stage IB lung adenocarcinoma who had undergone complete resection and were defined as high-risk by a newly developed recurrence risk scoring model.
Materials and Methods
Patientswho underwent curative resection for stage IB lung adenocarcinomawere analyzed with a newly developed recurrence risk scoring model and divided into a low-risk group and a high-risk group. The patients in the high-risk group were retrospectively divided into two groups based on whether they underwent adjuvant chemotherapy or observation. Recurrence-free survival and overall survival were compared between these two groups.
Results
A total of 328 patients who underwent curative resection between 2000 and 2009 were included in this study, of whom 110 (34%) received adjuvant chemotherapy and 218 (67%) underwent observation without additional treatment. According to our risk model, 167 patients (51%) were high-risk and 161 (49%) were low-risk. The 5-year recurrence-free survival rates and overall survival were 84.4% and 91.5% in low-risk patients and 53.9% and 74.7% in high-risk patients (p < 0.001). In high-risk patients, the 5-year overall survival rates were 77% among patients who underwent observation and 87% among those who underwent adjuvant chemotherapy (p=0.019).
Conclusion
Adjuvant chemotherapy prolonged overall survival among high-risk patients who had undergone complete resection for stage IB lung adenocarcinoma.
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Purpose Prognostic factors in patients with pulmonary metastases (PM) from colorectal cancer (CRC) are still controversial. This study assessed oncologic outcomes and prognostic factors in patients with metachronous PM from CRC.
Materials and Methods Between June 2003 and December 2011, 122 patients with CRC underwent curative resection of PM detected at least 4 months after CRC resection. Clinico-pathological factors selected from the prospectively maintained database were analyzed retrospectively.
Results The median disease-free interval (DFI) between resection of the primary tumor and detection of PM was 22.0 months (range, 4 to 85 months). Solitary PM were detected in 77 patients (63.1%), with a median maximal tumor diameter of 12.0 mm (range, 2 to 70 mm). Of 52 patients who underwent mediastinal lymph node (LN) dissection, eight patients had LN involvement. Five-year overall survival and disease-free survival (DFS) rates after initial pulmonary metastasectomy were 66.4% and 50.9%, respectively. DFI, mediastinal LN involvement, and the number and distribution of PM were significantly prognostic factors for DFS. In multivariable analysis DFI ≥ 12 months, solitary lesion, and absence of mediastinal LN involvement were independently prognostic for DFS. Of the 122 patients, 48 patients (39.3%) developed recurrent PM a median 13.0 months after initial pulmonary metastasectomy. Recurrent DFI was independently prognostic of DFS in patients who underwent repeated pulmonary metastasectomy.
Conclusion There is a potential survival benefit for patients with metachronous PM from CRC who undergo pulmonary metastasectomy, even those with recurrent PM. Pulmonary metastasectomy should be considered in selected patients, particularly those with longer DFI, solitary lesions, and absence of mediastinal LN involvement.
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PURPOSE Parameters of positron emission tomography-computed tomography (PET-CT) were compared with the results of histopathologic examination in order to determine which can provide an objective indication of response after neoadjuvant chemoradiation for treatment of thoracic esophageal squamous cell carcinoma (SCC). MATERIALS AND METHODS Between August 2003 and January 2010, data on 25 patients who underwent neoadjuvant chemoradiation and subsequent resection for treatment of esophageal SCC were retrospectively reviewed. Changes in maximum standardized uptake value (DeltaSUVmax), metabolic tumor volume (DeltaMTV), and total lesion glycolysis (DeltaTLG) were analyzed by comparison with the histopathologic findings. RESULTS Pathologic complete remission (CR) for the main tumor was achieved in 11 patients. Postradiation esophagitis was observed in 10 patients. DeltaSUVmax of the main tumor was significantly greater in the CR group than in the partial response (PR) group (p=0.039), while DeltaMTV and DeltaTLG of the main tumor were not (p=0.141 and p=0.349, respectively). The cut-off DeltaSUVmax value for CR was estimated as 72.1%, indicating significantly better accuracy than visual interpretation (p=0.045). Of the 48 involved lymph nodes, DeltaSUVmax and DeltaMTV of lymph nodes were significantly greater in the CR group than in the PR group (p=0.045 and p=0.014, respectively), while DeltaTLG was not (p=0.063). The cut-off value of DeltaSUVmax for prediction of CR in lymph nodes was calculated as 50.67%. CONCLUSION PET-CT could be used for prediction of response to neoadjuvant treatment in thoracic esophageal SCC.
DeltaSUVmax may be a more significant predictor for CR after neoadjuvant chemoradiation than DeltaTLG and DeltaMTV.
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PURPOSE Retrospective analyses of patients with stage I-II thymic epithelial tumors (TET) who were treated with either surgery alone (S) or surgery plus postoperative radiation therapy (SRT) were conducted to evaluate the role of adjuvant radiation therapy (RT). MATERIALS AND METHODS A total of 110 stage I-II TET patients following complete resection were included in this study. Postoperative radiation therapy was recommended for those with aggressive histologic type and/or invasive features according to the surgeons' judgment during the operation. A median dose of 54.0 Gy (range, 44 to 60 Gy) focused on the primary tumor bed was administered to 57 patients (51.8%). RESULTS In all patients, the rates of overall survival, disease-specific survival, and disease-free survival at 10 years were 91.7%, 97.1%, and 95.8%, respectively. No significant differences in disease-specific survival (100% in the S group and 93.5% in the SRT group at 10 years, p=0.12) and disease-free survival (98.1% in the S group and 94.5% in the SRT group at 10 years, p=0.41) were observed between the treatment groups, although a significantly larger number of World Health Organization (WHO)-type B2-C (p<0.001) and Masaoka stage II (p=0.03) tumors were observed in the SRT group than in the S group. No local recurrence was observed in the SRT group. No grade 2 or greater RT-related toxicities were observed in the SRT group. CONCLUSION Excellent outcomes were achieved in patients with stage I-II TET who underwent complete resection.
Considering excellent local control and low morbidity, adjuvant RT may be considered in high risk patients with WHO-type B2-C histology and Masaoka stage II.
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PURPOSE This research was designed to evaluate the chronic effect of isolated lung perfusion (ILP) with cisplatin on dogs. MATERIALS AND METHODS Fifteen dogs were divided into three groups. Group I was in ILP without cisplatin, group II with 2.5 mg/kg and group III with 5.0 mg/kg of cisplatin for 30 minutes respectively. Serial blood samples were taken before and after ILP for quantitative analysis of serum lactate dehydrogenase (LDH) and blood urea nitrogen/creatinine (BUN/Cr). The specimens from the lung were obtained 2 weeks after ILP. RESULTS There were no statistic significant differences in LDH concentration according to the time interval among the groups. The LDH concentration peaked at 1 week after ILP and declined thereafter to the pre-ILP concentration. The concentration of BUN/Cr was in normal range.
Histologic examination showed no pathologic change. No significant histopathologic differences were found in the pulmonary parenchyme and vasculature among the groups. All of the dogs survived without complication 2 weeks after ILP. CONCLUSION In ILP with cisplatin of 5.0 mg/kg in normal dog, the toxicity of cisplatin itself was not observed. With further study about the technique of ILP with cisplatin it would be effective to deliver high concentration of cisplatin into the target tissue minimizing lung damage.
PURPOSE Cancer gene therapeutic strategy using p53 tumor suppresser gene have been suggested to be effective in many solid tumors including non-small cell lung cancer (NSCLC).
To test generalized applicability, we tested a number of non-small cell lung cancer cell lines for their sensitivity to adenoviral-mediated wild-type p53 gene transfer. MATERIALS AND METHOD Replication-incompetent recombinant adenovirus encoding wild- type p53 (Avp53) under the control of the human cytomegalovirus (CMV) promoter was constructed and the cytotoxic effectiveness was evaluated in various NSCLC cell lines. Because 20 moi (multiplicity of infection; number of active virus particle/cell number) of Avp53 showed highly-effective cytotoxicity in p53-deleted cell lines (NCI-H1299, and NCI-H358), same amount was used for other cell lines. RESULTS Variable degree of cytotoxicity were observed in cell line with p53 mutation, but almost no effect were observed in those with will-type p53. Neither the infectivity of adenovirus, which was observed by x-gal stain after adenoviral mediated lac Z gene, nor the expression of p53 protein in infected cell, which was observed by western blot, was not the useful marker to expect the cytotoxic effect of Avp53. However, in responsive cell lines with Avp53, prominent expression of p21 protein, which was observed by western blot, was noticed. CONCLUSION In conclusion, adenoviral-mediated wild-type p53 transfer may not be applicable to every patient with non-small cell lung cancer, especially when the tumor has wild-type p53 gene. Better method to predict the effectiveness before application and strategy to widen the applicable extent is needed.