The oncological outcomes of postoperative radiotherapy in patients with stage II and III upper rectal cancer

The function of postoperative radiotherapy (PORT) in patients with completely resected pathologically N2 (pN2) non-small cell lung cancer (NSCLC) remains controversial due to a lack of prospective studies. The present study aimed to evaluate the efficacy of PORT in completely resected pN2 NSCLC when using modern radiation techniques, and to determine the associations between clinicopathological factors and PORT and survival rates. Following patient selection, 246 out of 269 consecutive patients with pN2 NSCLC were enrolled in the present study, with 88 patients having received postoperative chemotherapy (POCT) and PORT, 90 having received adjuvant chemotherapy, 1 having received adjuvant radiotherapy and the remaining 67 having received no adjuvant therapy. Overall survival (OS), local recurrence-free survival (LRFS) and disease-free survival (DFS) were estimated using the Kaplan-Meier method. The median age of the patients was 59 years, overall, 175 (71.1%) of the patients were male and the median radiation dose was 50.4 Gy. The median follow-up duration was 38.3 months. The 1-, 3- and 5-year OS rates were 98.9, 71.3 and 54.9%, and 93.0, 58.4 and 36.7% (P=0.011) in the PORT and non-PORT group, respectively. The 1-, 3- and 5-year LRFS rates were 95.5, 84.6 and 78.0%, and 86.6, 70.6 and 52.8% (P<0.001) in the PORT and non-PORT groups, respectively. The 1-, 3- and 5-year DFS rates were 86.5, 55.2 and 37.9%, and 80.9, 40.3 and 26.8% (P=0.132) in the PORT and non-PORT groups, respectively. Univariate analysis revealed that the OS rate was significantly increased in patients with peripheral tumors (P=0.029), pT1-2 (P=0.015), one N2 lymph node (LN) metastasis (P=0.001), single N2 station metastasis (P=0.030), no bronchial involvement (P=0.025), use of PORT (P=0.011) and POCT (P=0.003). Multivariate analysis revealed that PORT (HR, 0.755; 95% CI, 0.498-0.986; P=0.047), POCT (HR, 0.645; 95% CI, 0.420-0.988; P=0.044), bronchial involvement (HR, 1.453; 95% CI, 1.002-2.107; P=0.049) and ≥2 N2 metastases (HR, 1.969; 95% CI, 1.228-3.157; P=0.005) were significant independent predictors of OS. Subgroup analysis demonstrated an increased OS rate with PORT only in the patients with positive bronchial involvement and ≥2 N2 LN metastases. The results revealed that PORT may improve the LRFS and OS rates in completely resected pN2 NSCLC, and that the patients with positive bronchial involvement and ≥2 N2 LN metastases may receive more benefit from PORT.

Prognostic Significance Of Lymphocyte Ratio In Postoperative Radiation Therapy For Cholangiocarcinoma

BackgroundThe update of 2018 NCCN guidelines (central nervous system cancers) recommended the risk classification of postoperative patients diagnosed as adult low‐grade (WHO grade II) infiltrative supratentorial astrocytoma/oligodendroglioma (ALISA/O) should take tumor size into consideration. Moreover, the guidelines removed postoperative radiotherapy (PORT) for low risk patients. Our study aimed to explore the specific tumor size to divide postoperative patients into relatively low‐ or high risk subgroups and the effect of PORT for ALISA/O patients.MethodsWe conducted a retrospective study choosing 1277 postoperative ALISA/O patients from the Surveillance, Epidemiology, and End Results database. The X‐tile analysis provided the optimal cutoff point based on tumor size. The differences between surgery alone and surgery +RT groups were balanced by propensity score‐matched analysis. The multivariable analysis and the nomogram evaluated multiple prognostic factors based on cancer‐specific survival (CSS) and overall survival (OS).ResultsX‐tile plots defined 59 mm (P < 0.001) as the optimal cutoff tumor size value in terms of CSS, which was verified in multivariate analysis (P < 0.001). The Kaplan‐Meier analysis showed that the surgery alone had higher CSS and OS than surgery +RT, while the low risk group had no statistical significance after propensity score match. Multivariable analysis showed that surgery +RT was independently associated with diminished OS and CSS for high risk group, which had no statistical significance for low‐risk group.ConclusionsOur study suggested that tumor size of 59 mm was an optimal cutoff point to divide postoperative patients into relatively low‐ or high risk subgroups. PORT may not benefit patients, while the effects of PORT for low risk patients need further research.

Oncologic Outcomes of Kidney Sparing Surgery versus Radical Nephroureterectomy for the Elective Treatment of Clinically Organ Confined Upper Tract Urothelial Carcinoma of the Distal Ureter

The objective of the present study was to investigate the role of postoperative radiotherapy (PORT) after radical resection of stage IIIA-N2 non-small cell lung cancer (NSCLC). Subgroups of patients who benefited from PORT were evaluated. A retrospective review of 288 consecutive patients with resected pIIIA-N2 NSCLC at Beijing Chest Hospital (Beijing, China) was performed. Of these patients, 61 received PORT. The 288 patients were divided into PORT and non-PORT groups according to the treatment received. The baseline characteristics of the two patient groups were balanced using propensity score-matching (PSM; 1:1 matching). In total, 60 patients in the PORT group and 60 patients in the non-PORT group were matched. After PSM, the median survival time of the matched patients was 53 months. The 1-, 3- and 5-year overall survival (OS) rates of the PORT patient group were 95.0, 63.2 and 48.2%, respectively, while those of the non-PORT group were 86.7, 58.3 and 34.5%, respectively, and there was no significant difference between the two groups (P=0.056). The 5-year local recurrence-free survival (LRFS) rate in the PORT group was significantly improved (P=0.001). The effects of PORT on OS and LRFS rates were analysed in patients with different clinicopathological features. For subgroups with multiple N2 stations, N2 positive lymph nodes ≥4 and squamous cell carcinoma, PORT significantly increased the OS and LRFS rates (P<0.05). In conclusion, there was no statistically significant improvement in the 5-year OS rate with PORT overall, but there may be subgroups, such as patients with multiple N2 stations, N2 positive nodes ≥4 and squamous cell carcinoma histology, that could be explored as potentially benefitting from improved 5-year OS and LRFS rates with PORT.

Multimodal image-guided ablation on management of renal cancer in Von-Hippel-Lindau syndrome patients from 2004 to 2021 at a specialist centre: A longitudinal observational study

BackgroundThe National Comprehensive Cancer Network guidelines recommend routine postoperative adjuvant radiotherapy and chemotherapy for patients with stage III rectal cancer who do not receive neoadjuvant therapy before surgery. The present study aimed to evaluate the value of postoperative radiotherapy in patients with low-risk disease (pT1-3N1M0) who did not receive neoadjuvant therapy prior to total mesorectal excision.MethodsWe used the Surveillance, Epidemiology, and End Results database (2004–2016) to retrospectively recruit patients with pT1-3N1M0 rectal cancer whose initial treatment was radical surgery with postoperative adjuvant chemotherapy. A propensity score model was used to balance the baseline covariates.ResultsOf the 2012 patients included in the present study, 1384 received adjuvant chemoradiotherapy (radio group), whereas the remaining 718 received chemotherapy alone (no-radio group). There was no significant difference in cancer-specific survival rate between the two groups (log-rank test χ2 = 2.372, P = 0.124) in the overall sample. Additionally, in the propensity score−matched cohort, adjuvant radiotherapy did not improve cancer-specific survival. Subgroup analysis showed that having three positive lymph nodes and a tumor > 50 mm, combined with postoperative adjuvant chemotherapy, could lead to an improved tumor-specific survival rate, while other cases did not benefit from postoperative radiotherapy.ConclusionsFor patients with pT1-3N1M0 rectal cancer who did not receive neoadjuvant therapy before surgery, postoperative radiotherapy in addition to adjuvant chemotherapy did not significantly improve survival rates. The number of positive nodes (n = 3) and tumor size (> 50 mm) were found to be potential screening indicators for postoperative adjuvant radiotherapy.

Introduction: Surgery remains the most important treatment modality in non-small cell lung cancer. Indications for postoperative radiotherapy in this patient population have been the subject of debate for many years. Currently, patients with metastatic mediastinal lymph nodes (pN2) or with micro- or macroscopically non-radical resection are offered adjuvant radiotherapy in many institutions. The aim of this study was to retrospectively evaluate the results of postoperative radiotherapy in non-small lung cancer patients. Material and methods: Between December 1993 and November 2005, 366 patients underwent radical radiotherapy in the Department of Radiotherapy of Institute of Oncology at Wawelska St. in Warsaw, following surgical procedures. Indications for radiotherapy included non-radical resection in 192 patients, mediastinal lymph node metastases in 174 patients, or a combination of both in 26 persons. Stage I or II was assigned to 96 patients (I—9 pts, 2.4%; II—87 pts, 24%). Stage IIIA disease was present in 252 patients (69%), and stage IIIB in 18 persons (5%). Zubrod performance status 0 was noted in 302 patients (82.5%), score 1 in 54 patients (14.8%), and score 2 in 10 persons (2.7%). The results of treatment were analysed retrospectively. Major end-points in the study were survival and time to local recurrence. The percentage of surviving patients was calculated using the Kaplan-Meier estimator. The prognostic impact of various factors was analysed using multivariate analysis according to the Cox proportional hazard model. Results: One-year survival was reached by 78.02 ± 2% patients in the studied group, with two-year survival in 54.14 ± 2%, and five-year survival in 31.03 ± 2% patients. Two-year local recurrence-free survival was 45.62% ± 4%, and a five-year period free from recurrences was reached by 27.37 ± 4% patients. The probability of survival was significantly better in patients with better performance status, with a median survival of 2.75 years in patients with Zubrod score 0 and 1.67 years in Zubrod 1 + 2. Patients receiving &gt; 50 Gy irradiation had significantly better prognosis; median survival was 4.42 years in the &gt; 50 Gy group and 2.25 years in the ≤ 50 Gy group. Furthermore, local recurrences were less frequent in patients irradiated with &gt; 50 Gy. Patients planned for therapy using the 3D radiotherapy technique did not experience local recurrences; however, most of them received higher radiation doses compared to the others. A significant negative prognostic impact was found for radiation dose ≤ 50 Gy, worse performance status, and older age in univariate analysis. Good performance status (0) was prognostically beneficial. Multivariate analysis confirmed a significant adverse prognostic impact of total radiation dose lower than 50 Gy and older age, with good performance status being an independent good prognostic factor. Conclusions: 1. The efficacy of postoperative radiotherapy depended on radiation dose, patient age, and performance status. Total radiotherapy dose &gt; 50 Gy, younger age, and better performance status significantly correlated with longer survival. 2. Application of the 3D technique resulted in an optimal local control of the disease.

For non-small cell lung cancer (NSCLC) patients with pN2 status, the use of postoperative radiotherapy (PORT) remains controversial. Here, we investigated the association between different clinicopathological features and postoperative therapy and local control and survival in patients with resected pN2 NSCLC. We retrospectively analyzed 83 patients with pN2 NSCLC who underwent resection at Vanderbilt University Medical Center between 1994 and 2004. The relationship between 10 prognostic factors-gender, age at diagnosis, histology, tumor size, number of nodal stations involved, positive node number, surgical margin, extracapsular extension (ECE), and use of postoperative chemotherapy and PORT-and 2-year local recurrence-free survival (LRFS), distant recurrence-free survival (DRFS), recurrence-free survival (RFS), and overall survival (OS) rates was evaluated. Univariate and multivariate analyses were conducted using the Kaplan-Meier method and Cox proportional hazards ratios, respectively. On univariate analysis, PORT was significantly associated with greater LRFS, RFS, and OS rates, whereas chemotherapy was associated with a trend toward a higher OS rate. Negative surgical margins were predictive of a higher OS rate, and negative ECE was associated with higher LRFS and RFS rates. On multivariate analysis, only PORT and negative ECE were associated with a higher LRFS rate. On subgroup analysis, in negative ECE patients, PORT was significantly associated with a higher OS rate. PORT is associated with a higher OS rate for patients with resected pN2 NSCLC with negative ECE but not with positive ECE. The absence of ECE may serve as a useful prognostic variable in the selection of pN2 NSCLC patients for PORT and warrants further investigation in randomized clinical trials.

To explore the efficacy of radiotherapy combined with surgery for locally advanced rectal mucinous adenocarcinoma. Clinical data of patients with locally advanced rectal mucinous adenocarcinoma (T3-4 and/or N+) diagnosed by postoperative pathology from 1992 to 2013 were retrieved from the US Surveillance, Epidemiology, and End Results (SEER) database. Patients with local excision only, tumor biopsy or combined organ excision and incomplete follow-up information were excluded. All the enrolled patients were divided into three groups according to different treatments, including surgery alone (SA) group, preoperative radiotherapy combined with surgery (RT+S) group and surgery combined with postoperative radiotherapy (S+RT) group. The extracted data included basic data of patients and tumor, treatment status, and follow-up results. The χ² test was used to compare the count data. Kaplan-Meier method was used to draw the survival curve and calculate the survival rate. The survival was analyzed and compared by Log-rank test. The R language 2.8.1 was used to match the patients as 1:1 pairing through the propensity score matching (PSM). The matching variables included gender, age at diagnosis, year at diagnosis, ethnicity, degree of tissue differentiation, TNM stage, depth of invasion, making the baseline data of subgroups comparable. The Cox proportional hazard model was used for multivariate analysis of prognostic factors. A total of 2 149 patients with locally advanced rectal mucinous adenocarcinoma were enrolled in the study, including 1 255 males (58.4%) and 894 females (41.6%). There were 706 patients (32.9%) in the SA group, 772 patients (35.9%) in the RT+S group and 671 patients (31.2%) in the S+RT group. In SA, RT+S and S+RT groups, the median overall survival time was 39, 85, and 74 months respectively; the 5-year overall survival (OS) rate was 38.7%, 56.5%, and 55.2% respectively; the median cancer-specific survival (CSS) time was 86, 127, and 111 months respectively, and the 5-year CSS rate was 53.7%, 62.2% and 60.7% respectively. In comparison among the 3 groups, the 5-year OS rate and CSS rate in the SA group were significantly lower than those in the RT+S group and S+RT group (all P<0.001); the 5-year OS rate and CSS rate between RT+S group and S+RT group were not significantly different (P=0.166 and 0.392,respectively). After the baseline data of subgroups were corrected through PSM, the 5-year OS rate and CSS rate in the SA group (n=375) were significantly lower than those in the RT+S group (n=375)(OS:40.1% vs. 54.5%, P<0.001; CSS:54.3% vs. 63.3%, P=0.023). The 5-year OS rate and CSS rate in the SA group (n=403) were also lower than those in the S+RT group (n=403) (OS:37.4% vs. 54.7%,P<0.001;CSS:51.6% vs. 61.0%,P=0.031). The 5-year OS rate and CSS rate between RT+S group (n=363) and S+RT group (n=363) were not significantly different (OS:51.7% vs. 55.5%, P=0.789; CSS:57.7% vs. 60.5%, P=0.484). Cox multivariate analysis showed that radiotherapy (HR=0.845, 95%CI: 0.790 to 0.903, P=0.001) was an independent prognostic factor for OS of locally advanced rectal mucinous adenocarcinoma; radiotherapy (HR=0.907, 95% CI: 0.835 to 0.985, P=0.021) was also an independent prognostic factor affecting CSS in patients with locally advanced rectal mucinous adenocarcinoma. As compared with surgery alone, surgery combined with preoperative or postoperative radiotherapy is beneficial to the long-term survival of patients with locally advanced rectal mucinous adenocarcinoma.

Myxoid liposarcoma is more radiosensitive than other soft tissue sarcomas, and radiotherapy has been reported to reduce tumour size. This study was performed to compare the rates of local recurrence, survival and wound complications between pre- and post-operative radiotherapy for localized myxoid liposarcoma. From the Japanese Nationwide Bone and Soft Tissue Tumor Registry database, 200 patients with localized myxoid liposarcoma who received pre- (range, 30-56Gy) or post-operative (range, 45-70Gy) radiotherapy and surgery were included in this retrospective study. Propensity score matching was used to adjust for background differences between patients who received pre- and post-operative radiotherapy. Local recurrence occurred in five (5.0%) and nine (9.0%) patients in the pre- and post-operative radiotherapy groups, respectively (both n=100). The median follow-up time from diagnosis was 40.5months (IQR, 26.3-74). Univariate analysis showed a similar risk of local recurrence between the pre- and post-operative radiotherapy groups (5-year local recurrence-free survival 94.9% [95% CI 87.0-98.1] vs. 89.0% [95% CI 79.6-94.3]; P=0.167). Disease-specific survival was similar between the pre- and post-operative radiotherapy groups (5-year disease-specific survival 88.1% [95% CI 75.5-94.6] vs. 88.4% [95% CI 77.3-94.5]; P=0.900). The incidence of wound complications was similar between the pre- and post-operative radiotherapy groups (7.0% vs. 12.0%; P=0.228). There was no difference in local recurrence, survival or incidence of wound complications between pre- and post-operative radiotherapy for localized myxoid liposarcoma. Therefore, pre-operative radiotherapy for myxoid liposarcoma provides clinical results equivalent to post-operative radiotherapy.

Breast cancer remains the most common malignant neoplasm in women. According to the current standards, radiation therapy is one of the most important components of the multi-disciplinary treatment. The efficacy of the postoperative radiotherapy in both the traditional fractionation regimen and in the hypofractionation mode is not questioned. Contrary to the conventional fractionation, hypofractionation implies an increase in the daily dose and a reduction in the total treatment time. This approach helps reduce the treatment costs in patients with breast cancer while maintaining a high treatment efficacy and quality of life.The aim of the study was to analyze the economic efficiency of the dose hypofractionation as compared to the traditional mode of dose fractionation during postoperative radiation therapy in patients with breast cancer.Materials and methods. The study included 220 patients with breast cancer who received a combined treatment. Of these, 120 patients (study group) received hypofractionated radiotherapy (40.5 Gy in 15 fractions) whereas 100 patients of the control group were treated by the conventional therapy of 50 Gy in 25 fractions. Patients of the both groups were comparable by stages of the disease, systemic treatment, age and molecular type of tumor. The cost of treatment was calculated from the price list of this research center.Results. The present economic analysis showed that the method of hypofractionation was more (30% on average) cost-efficient than the conventional regimen while both modalities produced similar rates of total and relapse-free survival. We were then able to identify the main items in the list of medical services that contributed to the estimated difference in the treatment costs. Reducing the number of examinations and the treatment duration help reduce the expenditure of this medical organization.Сonclusion. Hypofractionation of postoperative radiotherapy in patients with breast cancer allows one to reduce the treatment costs as compared to the conventional fractionation regimen. The funds saved by optimizing the costs of postoperative radiation can be directed to the development of additional means of cancer treatment.

Objective To explore the predictive value of primary tumor site for loco-regional recurrence (LRR) in early breast cancer patients with one to three positive axillary lymph nodes after radical surgery. Methods The clinical data of 656 patients pathologically diagnosed with pT1-2N1M0 breast cancer who received radical surgery without postoperative radiotherapy in our hospital from 1998 to 2010 were retrospectively analyzed. In those patients, 156 had primary tumor located in the inner quadrant, 45 in the central quadrant, and 455 in the outer quadrant. LRR and local recurrence-free survival (LRFS) were end points. The Kaplan-Meier method was used to estimate LRR and LRFS rates. The log-rank test was used for survival difference analysis and univariate prognostic analysis. Multivariate analysis was performed using the Cox regression model. Results The 5-and 10-year sample sizes were 416 and 191, respectively. The 5-and 10-year LRR rates were 8.6% and 12.9%, respectively, while the 5-and 10-year LRFS rates were 86.2% and 76.4%, respectively. The univariate analysis indicated that age, pT stage, Ki67 level, molecular classification, and primary tumor in the inner quadrant were significant influencing factors for LRR (P=0.000, 0.006, 0.017, 0.004, 0.000). The multivariate analysis showed that age no greater than 35 years, primary tumor in the inner quadrant, and non-luminal subtype in molecular classification were independent prognostic factors for LRR and LRFS (P=0.0012, 0.012, 0.005). With an increasing number of risk factors (≥2), patients with primary tumor in the inner quadrant had a dramatically increased LRR rate and a reduced LRFS rate, while patients with primary tumor in the outer or central quadrant kept the same LRR and LRFS rates. Conclusions The primary tumor site holds promise for prediction of LRR and LRFS in patients with pT1-2N1M0 breast cancer after radical surgery. Patients with primary tumor located in the inner quadrant have a high LRR rate and a low LRFS rate, which provides an excellent predictor for the risk of recurrence in patients with high-risk breast cancer. Key words: Early Breast neoplasms/surgery; Primary tumor site; Predictive value

PurposeTo assess treatment outcomes in patients with stage I/II extranodal NK-/T-cell lymphoma, nasal type (ENKTCL-NT) and the feasibility of low-dose radiotherapy (RT) for achieving complete response (CR, defined as showing no residual hypermetabolic uptake on positron emission tomography [PET] or no residual lesions on computed tomography [CT]) after l-asparaginase-containing chemotherapy (l-ASP). Materials and methodsBetween 1992 and 2018, 76 patients with early-stage ENKTCL-NT who achieved CR or partial response (PR) after induction chemotherapy received adjuvant RT. RT doses (using biologically equivalent doses in 2 Gy fractions [EQD2]) and rates of local recurrence-free survival (LRFS), locoregional recurrence-free survival (LRRFS), distant metastasis-free survival (DMFS), progression-free survival (PFS), and cancer-specific survival (CSS) were determined. ResultsMedian follow-up was 5.1 years (range, 0.5–20.8). The median RT dose was 45 Gy (range, 20–54). The 5-year LRFS, LRRFS, DMFS, PFS, and CSS rates were 82.7 %, 78.2 %, 81.1 %, 68.7 %, and 84.4 %, respectively. CR after induction chemotherapy was notably linked to better survival outcomes across each endpoint. Survival outcomes were not affected either by the administration of l-ASP or EQD2 < 40 Gy in patients displaying CR after l-ASP. Adverse events (AEs) ≥ Grade 2 were significantly reduced with EQD2 < 40 Gy, compared with EQD2 ≥ 40 Gy. ConclusionAchieving CR after chemotherapy was the most predictive factor of survival outcomes in early-stage ENKTCL-NT. Decreasing RT doses in patients with CR after l-ASP appeared to minimize the occurrence of AE without compromising LRR risk; however, longer follow-ups and cautious application are warranted.

Postoperative radiotherapy increases locoregional control of patients with stage IIIA non–small-cell lung cancer treated with induction chemotherapy followed by surgery