Neuroendocrine neoplasms of the gallbladder: A single institute analysis of outcomes and prognostic factors

INTRODUCTION

Neuroendocrine neoplasms (NENs) are classified as neuroendocrine tumors (NETs), neuroendocrine carcinomas (NECs), and mixed neuroendocrine and nonneuroendocrine neoplasms (MiNENs) according to World Health Organization classification. We present our experience of NENs of the gallbladder (GB) from a high-volume cancer hospital.

MATERIALS AND METHODS

The present study is a retrospective analysis of all patients with GB NENs who presented between January 2015 and June 2023. The patient details and treatment received with follow-up were noted. The primary endpoint was overall survival (OS).

RESULTS

A total of 147 patients were included in the study. The median age was 52 (27-81) years. There was a female predominance (70.7%). NEC was the most common subtype (84.4%) followed by MiNEN (12.9%) and NET (2.7%). The most common stage at presentation was metastatic (70.7%) followed by locally advanced (21.8%), and early disease (7.5%). The median follow-up was 9.92 (1.77-76.06) months. Median OS was 6.14 (3.93-8.35) months. Median OS in patients who received multimodality treatment was 20.20 (17.99-22.41) months versus 4.00 (2.91-5.10) months in those who did not receive it.

CONCLUSION

GB NENs are rare, but aggressive tumors with NEC being the most common type. Multimodality treatment yields favorable outcomes. However, the development of better systemic therapy is needed to help improve survival further.

Imaging Recommendations for Diagnosis, Staging, and Management of Peritoneal Malignancies

Peritoneum is a serosal membrane lining the solid viscera and the hollow viscus of the abdomen and is made of a single layer of mesothelial cells. The most common primaries that spread to the peritoneum include gastrointestinal, ovarian, colorectal, and peritoneal metastases can be seen at some point during the disease course in 15 to 43%, 60 to 70% and 15 to 20% of patients, respectively. Other malignancies involving the peritoneum such as primary peritoneal carcinoma, peritoneal mesothelioma, peritoneal lymphomatosis, pseudomyxoma peritonei from low-grade appendiceal mucinous neoplasm, are far less common. The review strives to provide a framework for diagnosis and management of the disease.

Adjuvant chemotherapy in stage II-III operated colon cancer patients from a nontrial cohort in a low colon cancer prevalence country with predominant use of modified CAPOX

BACKGROUND

Data regarding the practice of adjuvant chemotherapy, specifically with modified CAPOX, and survival outcomes in operated colon cancer patients from a nontrial cohort in a lower-middle income and low prevalence nation like India is scarce.

MATERIALS AND METHODS

Patients who underwent upfront curative resection for colon cancer from January 2013 to December 2016 were analyzed for baseline variables and outcomes.

RESULTS

A total of 491 patients underwent curative resection in the predefined time period. The median age of the patients was 53 years (range: 17-87). Patients with Stage I, Stage II, and Stage III disease comprised 7.9%, 44.8%, and 45.4% of the entire cohort, respectively. Patients with Stage I cancer were observed. Adjuvant chemotherapy was planned for 384 patients (78.2%), with the doublet regimens (capecitabine-oxaliplatin, or 5-fluorouracil-oxaliplatin) being used commonly (77.6%). Common toxicities were Hand-foot syndrome (Grade 2/3 - 21.4%) and peripheral neuropathy (Grade 2/3 - 20.1%). About 85% of patients receiving monotherapy (capecitabine or 5 fluorouracil) and 81.2% of patients receiving doublet chemotherapy (mCAPOX or modified FOLFOX-7) completed their planned adjuvant treatment. With a median follow-up of 22 months, estimated 3 years event-free survival was 86%, and overall survival (OS) was 93.6%. Stage, younger age (<50 years), underlying cardiovascular abnormalities, need for dose reductions and noncompletion of planned chemotherapy predicted for inferior estimated 3-year OS on multivariate analysis.

CONCLUSIONS

Adjuvant chemotherapy especially with modified CAPOX appears well tolerated in the Indian population and early survival outcomes appear to be comparable to published literature.

Patient-Derived Organoids and Xenografts Uncover Therapeutic Vulnerabilities in Colorectal Signet Ring Cell Carcinomas

PURPOSE

Identifying therapeutic targets for signet ring cell carcinoma (SRCC) of the colon and rectum is a clinical challenge because of the lack of patient-derived organoids (PDO) or patient-derived xenografts (PDX). To address this unmet need, we present a robust method for establishing PDO and PDX models. We demonstrate that these models identify novel therapeutic strategies targeting therapy resistance and peritoneal metastasis.

EXPERIMENTAL DESIGN

We derived nine PDO and PDX models from patients with colorectal SRCC. Detailed histopathologic characterization confirmed the fidelity of these models to the original tumors. Drug sensitivity assays were conducted in vitro and in vivo to assess the therapeutic efficacy and impact on peritoneal metastasis. An RNA sequencing analysis was performed to identify critical pathways contributing to therapy resistance and metastatic progression.

RESULTS

We successfully developed and characterized PDO and PDX models from nine patients with SRCC. The SRCC PDO and PDX models exhibited histopathologic features consistent with those of the original tumors, including high mucin content and eccentric nuclei. They demonstrated increased sensitivity to FOLFIRI combined with paclitaxel or vincristine, reducing peritoneal metastasis. RNA sequencing analysis revealed the upregulation of autophagy genes in SRCC. Treatment with chloroquine alone resulted in decreased tumor growth and peritoneal metastasis.

CONCLUSIONS

Our study establishes PDO and PDX models as robust platforms for studying SRCC and identifying potential therapeutic strategies. Combining FOLFIRI with paclitaxel/vincristine or chloroquine alone inhibits tumor growth and prevents peritoneal metastasis, showing promise for clinical translation. These findings suggest that combining FOLFIRI with intraperitoneal paclitaxel warrants further investigation in phase I clinical trials for patients with SRCC.

Long-term outcomes after resection of extra-ampullary duodenal adenocarcinomas: single-center experience

BACKGROUND

Extra-ampullary duodenal adenocarcinoma is a rare neoplasm. The data on long-term outcomes after curative resection are limited, and the role of systemic chemotherapy is not defined in these tumors. This study aimed to investigate the prognostic factors and survival of patients with resected primary duodenal cancers.

METHODS

A retrospective analysis of patients with resected primary duodenal adenocarcinoma was conducted between January 2010 and December 2023.

RESULTS

A total of 59 patients were included in the study. The median age of patients was 60 years (IQR, 33-79), and 79.7% of patients were males. The second part of the duodenum was the most common location of the tumor in 42 patients (71.2%). Pancreaticoduodenectomy was performed in 57 patients (96.6%), and segmental duodenal resection was performed on 2 patients (3.4%). The median lymph node harvest was 18 (IQR, 2-70). Adjuvant chemotherapy was administered to 39 patients (66.1%). At a median follow-up of 32.00 months (IQR, 3.29-166.74), the 5-year overall survival (OS) and disease-free survival rates were 55.0% and 49.3%, respectively. Regarding prognostic factors, lymph node ratio (LNR; hazard ratio [HR], 2.94; 95% CI, 1.01-8.53), adenocarcinoma subtype (intestinal vs nonintestinal; HR, 4.59; 95% CI, 1.59-13.23), and margin of resection (HR, 44.24; 95% CI, 4.02-486.19) were significant factors for OS.

CONCLUSION

Margin-free surgical resection offers the best chance of cure for operable duodenal adenocarcinoma. The intestinal subtype and low LNR are predictors of better survival, and the role of adjuvant chemotherapy remains debatable until prospective randomized trials are conducted.

TAS-102 Plus Bevacizumab as an Effective and Well Tolerated Regimen in Chemotherapy-Refractory Advanced Colorectal Cancers – A Single Institution Retrospective Analysis

Objective There are limited data on the utility of TAS-102 plus bevacizumab in patients with chemotherapy-refractory metastatic colorectal cancer (mCRC) treated in India.

Methods Patients diagnosed with chemotherapy-refractory mCRC, defined as having received at least prior oxaliplatin and irinotecan–based chemotherapy between January 2017 and January 2022, and who began treatment with a combination of TAS-102 and bevacizumab were retrospectively analyzed for demographic variables, survivals, and prognostic parameters. The primary endpoint of the study was estimation of the median overall survival (OS) by the Kaplan–Meier method.

Results The data of 143 patients satisfied the prespecified inclusion criteria and were included for analysis. There was a predominance of left-sided CRCs (78%) and patients having greater than two sites of distant metastases (87%), with 41% of patients with at least two lines of prior therapy. With a median follow-up of 11.6 months, the median OS of the entire cohort was 10.9 months, while the median progression-free survival was 4.4 months. The combination was well tolerated, with the most common grade 3/4 side effects being neutropenia (25%), anemia (6%), and thrombocytopenia (4%). Dose modifications in TAS-102 were required in 20% of patients, though this did not entail permanent cessation of TAS-102 in any patient. The presence of a resected primary was prognostic for improved OS (p < 0.001), while signet ring histology predicted inferior OS (p < 0.001).

Conclusion The combination of TAS-102 and bevacizumab is an efficacious and safe therapeutic option in patients with mCRC who have received at least two lines of prior systemic therapy. There were no requirements for cessation of the combination in the current study, underlying the well-tolerated nature of the combination.

Feasibility of Hepatic Artery Infusion Chemotherapy for Colorectal Liver Metastasis in an Indian Setting

Hepatic artery infusion chemotherapy (HAIC) is a popular treatment modality for the treatment of colorectal liver metastasis (CRLM). The aim of this study was to determine the feasibility of HAIC for high-risk resected CRLM delivered using repeated femoral puncture and delivering 5-fluorouracil infusional chemotherapy along with systemic adjuvant chemotherapy. The present study is a retrospective review of a prospectively maintained database. All patients who underwent HAIC for colorectal liver metastases between July 2022 and July 2023 were included. A total of 12 patients were included in the study of which 11 completed four sessions as planned. The median age was 47 (29-73) years with nine male (81%) and two female (18%) patients. Rectum (n = 7, 63%) was the most common primary location. All patients received systemic chemotherapy with 5-fluorouracil-based regimens prior to HAIC (median 12 cycles). The median number of metastasis was 2 (1-8). Eight patients had metastasis in unilobar distribution (73%). On completion of HAIC treatment, nine patients (64%) were completely disease free with a median follow-up of 8 months. None of the patients experienced any immediate adverse events during or after completion of the procedure. Conventional HAIC comes with various challenges such as unavailability of the agent floxuridine and the specialized HAIC pump. Percutaneous HAIC has a lower chance of infection. The delivery of HAIC using repeated femoral punctures and 5FU chemotherapy was successful in over 90% of the patients making it a feasible option in the treatment of CRLM.

Gemcitabine, Cisplatin, and Nab-Paclitaxel as a First-Line Therapy for Advanced Biliary Tract Cancers

INTRODUCTION

Locally advanced, inoperable, or metastatic gallbladder cancers (GBC) are treated with either gemcitabine-platinum combinations or gemcitabine alone based on physician discretion. However, the combination of gemcitabine, cisplatin, and nab-paclitaxel (GCNP) has shown increased response rates and prolonged survival in a phase II trial of biliary tract patients.

MATERIALS AND METHODS

Consecutive series of patients diagnosed with locally advanced (liver infiltration > 5 cm, large nodes at porta, abutting duodenum), inoperable, and metastatic biliary tract patients between January 2018 and August 2022 were evaluated for first-line chemotherapy GCNP, in the multidisciplinary joint clinic (MDJC). The primary endpoint was ORR, and the major secondary endpoint was event-free survival (EFS).

RESULTS

A total of 142 patients received GCNP during the specified time period. The median age of the cohort was 52 years (range: 21-79), the majority were females (61.3%), and the majority were GB (81.7%). Response rates were available in 137 patients. Complete response, partial response, and stable disease were seen in 9 (6.3%), 87 (61.3%), and 24 (16.9%), respectively, for an ORR of 67.6% and a clinical benefit rate of 84.5%. The median EFS was 9.92 (95% CI, 7.69-12.14) months. Of the 52 patients in whom GCNP was given with NACT intent for locally advanced GBC, 17 patients underwent surgery (34%).

CONCLUSION

Our study indicates that GCNP leads to improved response rates, increased chances of resectability, and possibly better survival in patients with GBC.

Bidirectional Chemotherapy in Advanced Colorectal Cancer Peritoneal Metastases

Colorectal cancer (CRC) patients with extensive peritoneal metastases who are not candidates for CRS-HIPEC have poor prognoses. We evaluated the role of systemic and intra-peritoneal (IP) chemotherapy in these patients. CRC patients with confirmed peritoneal metastasis were enrolled. After implantation of IP chemoport patients received weekly IP paclitaxel in incremental doses of 20 mg/m2 with systemic chemotherapy. The primary end-points were the feasibility, safety, and tolerance (perioperative complications), and the secondary end-point was the clinico-radiological response. Patients included in the study were registered between January 2018 and November 2021. IP chemoport was implanted in 18 patients of which 14 patients underwent successful instillation of IP chemotherapy. Four patients did not receive IP chemotherapy in view of port-site infection for which IP ports were removed. The median age was 39 years (range: 19-61 years). The site of the primary tumor was equal in the colon and rectum. Fifty percent of patients had signet ring-cell adenocarcinoma, and 21% had poorly differentiated adenocarcinoma. The median serum of CEA level was 12.27 ng/mL (1.63-116.16 ng/mL). The median PCI score was 25 (18-35). The median number of IP chemotherapy cycles (weekly) was 3.5 (1-12 cycles). In 14.3% of patients, IP chemoport had to be removed due to block and infection. Three, five, and four patients had clinico-radiologically disease progression, stable disease, and partial response, respectively. One patient underwent subsequent successful CRS-HIPEC. There were no grade 3-5 (CTCAE 3.0) complications. Incremental doses of IP paclitaxel with systemic chemotherapy is safe and feasible in selected colorectal adenocarcinoma patients with peritoneal metastases without any serious adverse events.

Chemotherapy-Induced Alopecia: Can We Measure the Level of Distress in Oncology Patients? (The ALDO Study)

Prathepa JagadishChemotherapy-induced alopecia (CIA) has a strong and definite negative impact on body image in terms of perception of aging, depression, loss of interest, and confidence. This study involved the translation and validation of the chemotherapy-induced alopecia distress scale (CADS) into Hindi and Marathi (stage I) and the translated versions were used to assess the distress level associated with CIA at our tertiary care center (stage II). The level of distress associated with CIA was measured in terms of mild, moderate, and severe distress. The majority of the patients (58.66%) experienced severe distress due to CIA. The study demonstrates the validity and reliability of the CAD scale in our population. Indian married women with higher age group with cancer are affected more due to CIA. There was no significant association between socioeconomic status, number of chemotherapy cycles received, frequency of chemotherapy administration, and CIA distress. CADS is valid and predictive of the presence of severe distress in our chemotherapy patients. The treatment or prevention of CIA should be preceded by the counseling and support provided by the chemotherapy nurses.

Comparison of age-stratified survival outcomes of gallbladder cancers in an Indian population

BACKGROUND

Gallbladder cancers (GBCs) occur a decade earlier in India in comparison to the global occurrence, limiting the applicability of existing literature on age adjusted outcomes.

METHODS

Patients who underwent surgery between 01.01.2010 and 31.12.2020 for GBC were analyzed. Patients were divided into three age groups: group 1(≤40 years), group 2(41-60 years), group 3(>60 years) and their outcomes were compared.

RESULTS

Total of 6190 patients were treated for suspected or diagnosed GBC with a median age of 57 years. Curative resection was performed in 749 (67.9%) patients, of whom 114 (16.2%), 471 (62.9%), and 164 (21.9%) patients were in groups 1, 2, and 3, respectively. 5-year disease-free survival (DFS) [46.8% vs. 58.5%, p = 0.031] and overall survival (OS)[53.5% vs. 66.6%, p = 0.05] of group 3 were significantly lower than group 1. Patient age (HR 1.021), AJCC stage (HR 6.413), pathologic residual disease in the gallbladder fossa (HR 2.44), and extranodal tumor deposits (HR 1.762) were identified as independent predictors of poor OS.

CONCLUSIONS

Gallbladder cancers in the Indian population show poorer outcomes with advancing age. Higher proportion of males in the elderly group with a more advanced stage at presentation are plausible reasons for poorer outcomes.

Real-World Data on the Practice of Chemoradiation with Select Cohort Consolidation Chemotherapy in High-Risk Locally Advanced Rectal Cancers (SOLAR study)

Chemoradiation with capecitabine radiotherapy (Cape–RT) has been the standard of care as neoadjuvant treatment in locally advanced rectal cancer (LARC) for more than a decade. However, total neoadjuvant therapy has recently emerged as an alternative with the potential to impact survival outcomes; baseline outcomes with Cape–RT in real-world practice in the Indian context are not well known.

Treatment-naive patients with adenocarcinoma on histology and clinical-radiologically diagnosed LARC who received Cape–RT from June 2014 to December 2021 after multidisciplinary discussion were included. Patients received a long course of conventionally fractionated external beam RT (45–50 Gy in 25#) with concurrent oral capecitabine at a dose of 1650 mg/m2/day. Post approximately 6 to 8 weeks of completion of Cape–RT, patients were evaluated clinically and by magnetic resonance imaging pelvis for total mesorectal excision (TME) in the multidisciplinary team meetings. The primary endpoint of the study was event-free survival (EFS), and the secondary endpoint was overall survival (OS) and pathological complete response (PCR) rates. EFS and OS were calculated using the Kaplan–Meier method.

A total of 1,189 patients with a median age of 49 years (range: 15–95) were identified and included. A significant proportion of patients had high-risk characteristics, such as T3/T4 disease (94%) and node positivity (90%), and they involved circumferential resection margin (CRM) (51%) at baseline. Signet ring and mucinous histology were seen in 13 and 11% of patients. Two hundred and seventy-six patients (23%) required further consolidation chemotherapy (commonly CAPOX [capecitabine-oxaliplatin] or modified FOLFIRINOX [5-fluorouracil-leucovorin-irinotecan-oxaliplatin]) post-Cape–RT prior to attempting surgery due to either persistent CRM positivity, clinical T4 disease, prostate abutment, sphincter involvement (248 patients, 21%), or extensive bulky disease with poor response (12 patients, 1%). Overall, 14 patients (6%) had an interruption in RT and 22 (8%) in chemotherapy. Post-Cape–RT, with or without chemotherapy, 945 patients (79%) underwent TME. Chemotherapy post-TME was administered in 808 patients (78%). With a median follow-up of 54 months (range: 51.2–57.2), the 3- and 5-year EFS for the entire cohort was 73.2% (95% confidence interval [CI]: 70.6–75.8) and 64.3% (95% CI: 61.1–67.5), respectively, while the estimated 3- and 5-year OS was 81.3% (95% CI: 78.9–83.7) and 73% (95% CI: 70–76), respectively. On multivariate analysis, the presence of higher T stage (p < 0.001) and signet ring histology (p = 0.004) predicted inferior OS.

Real-world data in a less-resourced setting concurs with published prospective and Western real-world data. This provides confidence in implementing consolidation chemotherapy in total neoadjuvant settings in countries with fewer resources.

Outcomes of radical surgical resections for nonmetastatic anorectal melanomas: Experience from a tertiary care centre

AIM

The outcome of radical surgery in nonmetastatic anorectal melanoma (AM) patients is studied infrequently. Here, we aimed to explore the stage-wise outcomes and the impact of radical resections in these patients.

METHODS

In this single-centre retrospective study, data of 154 eligible patients were recorded and analysed. Data were obtained from November 2010 to September 2019 with follow-up until November 2020. Overall survival (OS) and disease-free survival (DFS) was calculated by Kaplan Meir method and univariate analysis of prognostic factors by Cox regression.

RESULTS

Of 154 patients, 110 were metastatic (stage III) and 44 were nonmetastatic (stage I:22, stage II:22) and underwent curative resections. Median follow-up was 48 months (14-119 months). A total of 39 patients underwent total mesorectal excisions (TME) and five transanal excision (TAE) were performed. Seven patients underwent extended resections. Stage I and II patients had 3- and 5-year OS of 40% and 36%; and DFS of 45% and 33.2%, respectively. Median OS and DFS were 31 and 24 months, respectively. Stage II (node-positive) patients had better median OS compared to stage III (21 vs. 4 months; p = 0.000), and 54.5% patients had recurrences, most commonly both systemic and nodal (45.83%). Median OS of patients without recurrence was 34 months.

CONCLUSION

In this large surgical series of AMs, outcome in stage I and II patients was significantly better than stage III and patients with stage II disease can have acceptable oncological outcomes. Radical surgical resections with or without lymphadenectomy could be considered in these patients. The role of adjuvant systemic therapy and radiation needs to be explored as part of multimodality treatment.

Outcomes with second-line chemotherapy in advanced pancreatic cancers: A retrospective study from a tertiary cancer center in India

INTRODUCTION

Approximately 40% of patients receiving first-line chemotherapy (CT1) for advanced pancreatic adenocarcinomas (PDACs) receive second-line chemotherapy (CT2). The most appropriate regimen to be used has not been identified, and data regarding CT2 in advanced PDAC from India are scarce.

MATERIALS AND METHODS

A retrospective analysis of advanced PDAC patients who were evaluated during the period of August 2013 to August 2016 in the Department of GI medical Oncology, at Tata Memorial Hospital was conducted. Patients with histologically proven PDAC and started on CT2 postprogression or recurrence after CT1 were included for analysis.

RESULTS

A total of 237 patients received CT1 in the period of study, of which 76 patients (39.66%) received CT2. The median age of patients was 59.5 years (range: 38-82), majority were male (69.7%), and 14 patients (18.4%) had undergone curative pancreatic resection at baseline. The common regimens used as CT2 were modified 5 fluorouracil/leucovorin/irinotecan (mFOLFIRI) (35.5%), gemcitabine-nab paclitaxel (18.4%), and gemcitabine-erlotinib (11.8%). Common grade 3/4 toxicities noted were fatigue (10.3%), anemia (10.3%), neutropenia (7.4%), and vomiting (7.4%). Dose reductions were required in 32.9% of patients. RR, DCR, median event free survival, and median overall survival were 21.1%, 48.7%, and 5.94 months (95% confidence intervals [CI]: 4.68-7.20) and 8.08 months (95% CI: 7.11-9.07) respectively.

CONCLUSIONS

CT2 in advanced PDAC appears feasible in the Indian setting if the patients are appropriately selected and they can be treated with acceptable toxicities and reasonable outcomes.

Imaging Recommendations for Diagnosis, Staging, and Management of Pancreatic Cancer

Pancreatic cancer is the fourth most prevalent cause of cancer-related death worldwide, with a fatality rate equal to its incidence rate. Pancreatic cancer is a rare malignancy with a global incidence and death ranking of 14th and 7th, respectively. Pancreatic cancer cases are divided into three categories without metastatic disease: resectable, borderline resectable, or locally advanced disease. The category is determined by the tumor's location in the pancreas and whether it is abutting or encasing the adjacent arteries and/or vein/s.

The stage of disease and the location of the primary tumor determine the clinical presentation: the pancreatic head, neck, or uncinate process, the body or tail, or multifocal disease. Imaging plays a crucial role in the diagnosis and follow-up of pancreatic cancers. Various imaging modalities available for pancreatic imaging are ultrasonography (USG), contrast-enhanced computed tomography (CECT), magnetic resonance imaging (MRI), and 18-fluoro-deoxy glucose positron emission tomography (FDG PET).

Even though surgical resection is possible in both resectable and borderline resectable non-metastatic cases, neoadjuvant chemotherapy with or without radiotherapy has become the standard practice for borderline resectable cases as it gives a high yield of R0 resection.

Nonoperative management in low-lying rectal cancers undergoing chemoradiation

BACKGROUND

To evaluate outcomes of postneoadjuvant chemoradiotherapy (NACTRT) wait and watch strategy (WWS) in distal rectal cancers.

METHODS

All consecutive patients from December 2012 to 2019 diagnosed with distal rectal tumors (T2-T4 N0-N+) having a complete or near-complete response (cCR or nCR respectively) post-NACTRT and wished for nonsurgical treatment option of WWS were included in this study. Patients were observed with 3 monthly MRI, sigmoidoscopy, and digital rectal examination (DRE) for 2 years and 6 monthly thereafter. Organ preservation rate (OPR), local regrowth rate (LRR), nonregrowth recurrence-free survival, and overall survival (OS) were estimated using the Kaplan-Meier method, and factors associated with LRR were identified on univariate and multivariate analysis using the log-rank test (P < 0.05 significant).

RESULTS

Sixty-one consecutive patients post-NACTRT, achieving cCR [44 (72%)] and nCR [17 (28%)], respectively, were identified. All patients received pelvic radiotherapy to a dose of 45-50Gy conventional fractionation with concurrent Capecitabine. Additional boost dose with either external beam or brachytherapy was given to 39 patients. At a median follow-up of 39 months, 11 (18%) patients had local regrowth, of which seven were salvaged with surgery and the rest are alive with disease, as they refused surgery. The overall OPR, nonregrowth recurrence-free survival, OS was 83%, 95%, and 98%, respectively. Seven (11%) patients developed distant metastasis, of which six underwent metastasectomy and are alive and well. LRR was higher in patients with nCR versus cCR (P = 0.05).

CONCLUSION

The wait-and-watch strategy is a safe nonoperative alternative management for selected patients attaining cCR/nCR after NACTRT with excellent outcomes.

Modified FOLFIRINOX compared to Gemcitabine & nab-Paclitaxel in advanced pancreatic ductal adenocarcinoma - results of a match-pair analysis

BACKGROUND & OBJECTIVES

FOLFIRINOX and gemcitabine plus nab-paclitaxel (GN) are the most commonly used regimens in advanced pancreatic ductal adenocarcinomas (PDACs). As there is limited data on comparison of these two regimens, the present study was aimed to compare survivals and tolerance for both regimens through a match-pair analysis.

METHODS

The data of 350 patients with metastatic and locally advanced PDAC, treated between January 2013 and December 2019, were retrieved. A 1:1 matching, using age and performance status, without replacement was performed by using nearest neighbour matching method.

RESULTS

A total of 260 patients (130 modified FOLFIRINOX and 130 GN) were matched. The median overall survival (OS) was 12.98 months [95% confidence interval (CI) 7.257-8.776 months] in modifications of FOLFIRINOX (mFOLFIRINOX) cohort and 12.06 months (95% CI 6.690-8.88 months) in GN group (P=0.080). The incidence of grade 3 and 4 infections, diarrhoea, oral mucositis, and fatigue was higher with mFOLFIRINOX. Patients who received second line therapy had improved OS as compared to those who did not (14.06 vs. 9.07 months, P<0.001).

INTERPRETATION & CONCLUSIONS

GN and mFOLFIRINOX appear to have similar survival outcomes in an unselected match paired patient population with advanced PDAC. A markedly increased incidence of non-myelosuppressive grade 3 and grade 4 side-effects and lack of survival improvements suggest a need for nuanced use of the mFOLFIRINOX regimen. Administration of second-line chemotherapy improves OS in patients with advanced PDAC.

MASCC antiemetic consensus recommendations: resource-limited settings

PURPOSE

Prevention of chemotherapy-induced nausea and vomiting (CINV) remains an essential supportive care need for patients receiving cancer treatment. Due to inadequate access to antiemetics in many countries, guideline-recommended CINV prophylaxis is not always possible. Our goal was to formulate antiemetic recommendations for resource-limited settings and define alternative antiemetic regimens for the CINV prophylaxis after highly (HEC) and moderately emetic chemotherapy (MEC), when NK1-receptor antagonists are not accessible.

METHODS

The recommendations based on the MASCC/ESMO 2023 Guideline Update were considered as the best option. The stratification based on a meta-analysis published by Filetti et al. (2023) was used in order to select and rank NK1-receptor antagonist-free regimens by their probability of achieving complete response. Alternative NK1-receptor antagonist-free regimens based on olanzapine are proposed, ranked by their efficacy as "better" and "good" options when "best" regimens recommended by the MASCC/ESMO 2023 Guideline Update were not available or affordable.

RESULTS

For the prevention of acute CINV, in patients receiving HEC (HEC-cisplatin and AC-HEC) with no access to an NK1-receptor antagonist, a 3-drug regimen including single doses of a 5-HT3-receptor antagonist, dexamethasone, and olanzapine given before chemotherapy is recommended as an alternative option. Olanzapine and dexamethasone are recommended days 2-4 after chemotherapy. The O10PD regimen (10 mg olanzapine, palonosetron, and dexamethasone) is suggested as the alternative regimen in the category "better." Other 5-HT3-receptor antagonists (ondansetron, granisetron) may be used if palonosetron is not affordable (category "good"). No guideline is possible for the alternative regimens to prevent acute CINV following MEC because of limited (carboplatin, AUC ≥ 5) or unavailable data (oxaliplatin chemotherapy in women aged < 50 years). Limited data are also available on the management of CINV following trastuzumab-deruxtecan.

CONCLUSION

The most effective prevention of CINV recommended by the MASCC/ESMO 2023 Guideline Update must be given when available and affordable. These recommendations were developed to facilitate decision on which regimen to use when the best MASCC/ESMO 2023 recommended regimen is not accessible because NK1-receptor antagonists are either not available or not affordable.

Adenosquamous carcinoma of the gallbladder: a Bi-institutional experience in managing this rare entity

BACKGROUND

Adenosquamous Gallbladder Cancers (ASGBC) are rare variety of GBCs. Relative paucity of data with regards to the management of ASGBC exists.

METHODS

Patients with diagnosis of ASGBC from January 2012 to March 2022 were categorised into 'Early', 'Locally advanced (LA)' and 'Metastatic (M)' ASGBC as per the predefined 'TMH Criteria'.

RESULTS

A total of 196 patients included were categorised into early ASGBC (n = 19,9.7%), LA - ASGBC (n = 53,27%) and M - ASGBC (n = 124,63.3%) with median overall survival (OS) being worst for M - ASGBC (3.9 months) and best for early ASGBC (not reached). The 1-year and 3-year OS of LA-ASGBC patients who underwent surgery was significantly higher than those with non-surgical treatment (72.6%, 35.6% vs 25.1%, 0%, p <0.001). Although, the median OS of resected ASGBC was less as compared to resected gallbladder adenocarcinomas (GBACs) (40.8 vs. 56.1 months), it did not reach statistical significance (p=0.06). However, at higher stages of resected LA - ASGBC (Stage III), the median OS was significantly lower as compared to stage-matched resected GBACs (14.5 vs. 30.1 months, p= 0.006).

CONCLUSION

Multimodality treatment consisting of margin negative surgical resection with perioperative chemotherapy offers the best chance of long-term survival in ASGBC.

Adjuvant therapy may improve overall survival in high-risk periampullary adenocarcinomas patients - A match-pair analysis from a multi-institutional cohort study (The MIPPAP study)

BACKGROUND

The role of adjuvant therapy in resected periampullary adenocarcinomas is equivocal due to contrasting data and limited prospective trials.

METHODS

The Multicentre Indian Pancreatic & Periampullary Adenocarcinoma Project (MIPPAP), included data from 8 institutions across India. Of the 1679 pancreatic resections, 736 patients with T3/T4 and/or Node positive adenocarcinomas (considered as high risk for recurrence) were included for analysis. Three (adjuvant): one (observation) matching, using T3/T4 T staging, nodal positivity and ampullary subtype was performed by using the nearest neighbour matching method.

RESULTS

Of 736 patients eligible for inclusion, 621 patients were matched of which 458 patients received adjuvant therapy (AT) (predominantly gemcitabine-based) and 163 patients were observed (O). With a median follow-up of 42 months, there was a statistical difference in overall survival in favour of patients receiving AT as compared to those on observation [68.7 months vs. 61.1 months, Hazard ratio: 0.73 (95% CI: 0.54-0.97); p = 0.03]. Besides AT, presence of nodal involvement (median OS: 65.4 months vs not reached; p = 0.04) predicted for inferior OS.

CONCLUSIONS

The results of the match-pair analysis suggest that adjuvant therapy improves overall survival in periampullary adenocarcinomas at high risk of recurrence with a greater benefit in T3/T4, node-positive and ampullary subtypes.

Perioperative Modified FLOT Versus EOX in Locally Advanced Resectable Gastric and Gastro-Oesophageal Junction Adenocarcinoma: Results of a Matched-Pair Analysis

BACKGROUND AND OBJECTIVES

There is limited real-world data on the efficacy of 2-weekly cycles of docetaxel, oxaliplatin, leucovorin, and fluorouracil (FLOT) compared to epirubicin, oxaliplatin, and capecitabine (EOX) as perioperative therapy in esophagogastric adenocarcinomas (EGAC).

METHODS

The data of 611 patients with EGAC treated with perioperative chemotherapy and planned for curative resection between January 2013 and December 2019 were retrieved. Patients receiving EOX and a dose-modified version of FLOT (mFLOT) were evaluated. A 1:1 matching, using age, tumour location, signet ring histology, and Eastern Cooperative Oncology Group performance status, without replacement was performed by using nearest neighbour matching method. The primary endpoint of the study was 3-year event-free survival (EFS).

RESULTS

A total of 593 patients (261 with EOX and 332 with mFLOT) were matched. One hundred and nighty-eight patients (76%) and 285 patients (86%) in the EOX and mFLOT cohorts underwent curative resection, respectively (p = 0.002). With a median follow-up of 35 and 53 months, respectively, the primary outcome of 3-year EFS was statistically superior in patients receiving mFLOT as compared to the EOX regimen (60% vs. 39%; p < 0.001). There was a greater incidence of grade 3 and grade 4 neutropenia (neoadjuvant: 18% vs. 2%; p < 0.001, adjuvant: 18% vs. 1%; p = 0.001) and febrile neutropenia (neoadjuvant: 8% vs. 1.1%; p < 0.001, adjuvant: 6% vs. 0; p = 0.001) with mFLOT.

INTERPRETATION AND CONCLUSION

mFLOT is associated with improved resection rates and survival in comparison to EOX as perioperative therapy in gastric adenocarcinomas in this large real-world cohort, with manageable increase in clinically relevant toxicities such as grade 3 and grade 4 febrile neutropenia and neutropenia.