Highlights from ASCO-GI 2021 from EORTC Gastrointestinal tract cancer group.

Last year the field of immunotherapy was finally introduced to GI oncology, with several changes in clinical practice such as advanced hepatocellular carcinoma or metastatic colorectal MSI-H. At the virtual ASCO-GI symposium 2021, several large trial results have been reported, some leading to a change of practice. Furthermore, during ASCO-GI 2021, results from early phase trials have been presented, some with potential important implications for future treatments. We provide here an overview of these important results and their integration into routine clinical practice.

Highlights from the 2022 ASCO gastrointestinal cancer symposium: An overview by the EORTC gastrointestinal tract cancer group.

Recently, we have witnessed impressive diagnostic and therapeutic changes for gastrointestinal cancer patients. New challenges brought by the COVID-19 pandemic have led us to re-evaluate our work priorities. Thanks to the commendable resilience of both investigators and patients, however, clinical research never stopped. In addition to conducting cutting-edge research and serving patients' needs, as EORTC Gastrointestinal Tract Cancer Group, we are committed to pursuing educational initiatives beneficial to the entire European oncology community and beyond. In this regard, we have been providing critical discussions of new data from major international meetings. In this article, we discuss results of important selected studies presented at the 2022 ASCO Gastrointestinal Cancer Symposium, putting them in perspectives and highlighting potential implications for routine practice. With the number of in-person attendees and practice-changing/informing trials presented, this meeting represented a milestone in the return to normality as well as in the fight against cancer.

An immunohistochemical procedure to detect patients with paraganglioma and phaeochromocytoma with germline SDHB, SDHC, or SDHD gene mutations: a retrospective and prospective analysis.

BACKGROUND: Phaeochromocytomas and paragangliomas are neuro-endocrine tumours that occur sporadically and in several hereditary tumour syndromes, including the phaeochromocytoma-paraganglioma syndrome. This syndrome is caused by germline mutations in succinate dehydrogenase B (SDHB), C (SDHC), or D (SDHD) genes. Clinically, the phaeochromocytoma-paraganglioma syndrome is often unrecognised, although 10-30% of apparently sporadic phaeochromocytomas and paragangliomas harbour germline SDH-gene mutations. Despite these figures, the screening of phaeochromocytomas and paragangliomas for mutations in the SDH genes to detect phaeochromocytoma-paraganglioma syndrome is rarely done because of time and financial constraints. We investigated whether SDHB immunohistochemistry could effectively discriminate between SDH-related and non-SDH-related phaeochromocytomas and paragangliomas in large retrospective and prospective tumour series. METHODS: Immunohistochemistry for SDHB was done on 220 tumours. Two retrospective series of 175 phaeochromocytomas and paragangliomas with known germline mutation status for phaeochromocytoma-susceptibility or paraganglioma-susceptibility genes were investigated. Additionally, a prospective series of 45 phaeochromocytomas and paragangliomas was investigated for SDHB immunostaining followed by SDHB, SDHC, and SDHD mutation testing. FINDINGS: SDHB protein expression was absent in all 102 phaeochromocytomas and paragangliomas with an SDHB, SDHC, or SDHD mutation, but was present in all 65 paraganglionic tumours related to multiple endocrine neoplasia type 2, von Hippel-Lindau disease, and neurofibromatosis type 1. 47 (89%) of the 53 phaeochromocytomas and paragangliomas with no syndromic germline mutation showed SDHB expression. The sensitivity and specificity of the SDHB immunohistochemistry to detect the presence of an SDH mutation in the prospective series were 100% (95% CI 87-100) and 84% (60-97), respectively. INTERPRETATION: Phaeochromocytoma-paraganglioma syndrome can be diagnosed reliably by an immunohistochemical procedure. SDHB, SDHC, and SDHD germline mutation testing is indicated only in patients with SDHB-negative tumours. SDHB immunohistochemistry on phaeochromocytomas and paragangliomas could improve the diagnosis of phaeochromocytoma-paraganglioma syndrome. FUNDING: The Netherlands Organisation for Scientific Research, Dutch Cancer Society, Vanderes Foundation, Association pour la Recherche contre le Cancer, Institut National de la Santé et de la Recherche Médicale, and a PHRC grant COMETE 3 for the COMETE network.

Resection of carotid body tumors: results of an evolving surgical technique.

OBJECTIVE: To evaluate a modified technique for carotid body tumor (CBT) resection. BACKGROUND: Resection of CBT can lead to substantial postoperative morbidity because of a rich vascularization and close connection to neurovascular structures. The impact of a modified surgical technique on postoperative outcome was evaluated and compared with a historical group and the literature. METHODS: Medical records of patients who underwent CBT surgery at Leiden University Medical Center between 1963 and 2005 were retrospectively reviewed. Before 1992, a standard approach was conducted. After 1992, most tumors were resected using an alternative technique, working in a craniocaudal fashion from skull base to carotid bifurcation. Data were reported as details of the pre, intra-, and postoperative periods. RESULTS: A total of 111 CBT resections (69 standard, 42 craniocaudal) were performed in 94 patients (44 male/50 female, mean age 41). The standard group consisted of 39 Shamblin I (56%), 22 II (32%), and 8 III (12%) tumors. The craniocaudally approached CBT included 12 Shamblin I (29%), 13 II (31%), and 17 III (40%) tumors. The mean blood loss was 901 mL (standard operations) versus 281 mL (craniocaudal approach, P < 0.0005). Persistent cranial nerve damage was encountered after 26 (23%) of 111 operations; 21 after the standard operations (30% within this group, including 3 preexistent nonresolved cranial nerve deficits); and 5 (12%, including 2 due to additional vagal body resections) after the craniocaudal operations (P = 0.025). CONCLUSIONS: The craniocaudal dissection technique of a CBT can be applied with little blood loss, thereby reducing the risk of postoperative morbidity.

Laparoscopic umbilical hernia repair in the presence of extensive paraumbilical collateral veins: a case report.

A patient with an umbilical hernia presenting with collateral veins in the abdominal wall and umbilicus is a case that every hernia surgeon has to deal with occasionally. Several underlying diseases have been described to provoke collateral veins in the abdominal wall. However, the treatment strategy should be uniform. We herein report a case of a successful laparoscopic umbilical hernia repair in a patient with collateral veins in the abdominal wall and umbilicus. A 63-year-old man was referred to the surgical outpatient clinic with a large symptomatic umbilical hernia and collateral veins in the abdominal wall, secondary to an occlusion of both common iliac veins. Because of collateral veins in the umbilicus and the size of the hernial defect, he was offered laparoscopic hernia repair without compromising these veins. Because of the extensive abdominal wall collaterals, duplex sonography vein mapping was performed preoperatively to mark a safe collateral-free area for trocar introduction. The defect was repaired by mesh prosthesis.

Wound complications at the groin after peripheral arterial surgery sparing the lymphatic tissue: a double-blind randomized clinical trial.

BACKGROUND: The groin incision after arterial reconstructive surgery is most likely at risk for infectious or lymphatic wound complications. Theoretically; sparing lymphatic tissue by a lateral approach to the femoral artery should minimize these. The aim of this study was to assess the incidence of wound complications after the lateral versus the direct approach of the common femoral artery. METHODS: The study population included all patients who underwent an exploration of the common femoral artery between May 2002 and December 2005. RESULTS: After 6 weeks, no statistical differences in the occurrence of wound complications could be shown. A wound infection was present after 6 weeks in 6.1% in the direct group versus 6.0% in the lateral group. Lymphorrhea was persistent in 3.1% in the direct group versus 5.0% in the lateral group. CONCLUSIONS: Using a lateral vertical incision for the approach of the common femoral artery did not decrease the incidence of postoperative wound complications.

Quality control of colorectal surgery with an extensive complication registration system.

BACKGROUND/AIMS: Since 1996, a standard registration is used to obtain a clear understanding of the complications that occur after colorectal surgery. In our registration system the cause of a complication and the detrimental effect to the patient's health are coded. METHODS: The treatment of colorectal diseases was evaluated to analyze the quality of medical care. RESULTS: From 1996 to 2000, a total of 169 complications were documented in 108 of the 353 patients operated on. Leakage of the anastomosis occurred in 22 cases (6%) and wound infection occurred in 11 cases (3%). Most of the complications required no or little medical attention (n = 101, 59%). 51% of the complications could be attributed to the physical condition of the patient. Surgical complications were the cause in 31% of the cases and management problems in 16% of the cases. CONCLUSION: A registration system provides good insight into the frequency and severity of the complications after colorectal surgery. Extensive registration is mandatory to provide reliable information, comparing the results year by year. This provides the basis for continuous improvement of medical protocols on the surgical ward.

Mortality after peripheral bypass surgery: value of a mortality scoring system in evaluating the quality of care.

The objective of this study was to determine the role of a mortality registration in the quality control of patients who died after peripheral bypass surgery. We developed a mortality registration to classify causes of death, to evaluate shortcomings in treatment, and to determine the extent of agreement between pre- and postmortem findings. In a 10-year period, 28 of the 1,022 patients (2.7%) who underwent peripheral arterial reconstruction died. Fifty-three percent of the patients died owing to postoperative complications, most frequently a myocardial infarction. A shortcoming in the medical treatment was observed in only one patient. Forty-three percent of the relatives gave permission for an autopsy. In only two cases, the autopsy report revealed a myocardial infarction that had remained unnoticed during the clinical course. In this selected group of patients undergoing a peripheral bypass operation, the causes of death and the shortcomings in medical care could usually be identified without the help of autopsy data.

Value of keeping records of mortality.

OBJECTIVE: To evaluate treatment and complications which is essential for good medical practice. DESIGN: Prospective audit. SETTING: City hospital, The Netherlands. SUBJECTS: All the patients who died on the surgical ward between 1994 and 1998 and were classified according to four categories of mortality recording. INTERVENTIONS: The causes of death, inaccuracies in treatment and the extent of agreement between premortem and postmortem findings were documented. MAIN OUTCOME MEASURES: Morbidity and mortality. RESULTS: Of the 11,195 patients admitted, 420 (4%) deceased during their hospital stay. Most patients died of the disease with which they presented at admission (n = 176, 42%) or of complications (n = 167, 40%). In 20% (n = 83) of the cases a shortcoming in the clinical course was found. 251 of the 420 patients who died (60%) had a necropsy. 53 of the 251 reports (21%) gave information that could have had an effect on the treatment or the clinical course. CONCLUSIONS: Recording mortality is a way of testing the diagnostic and therapeutic accuracy in our quest for a high quality of care.