Cytoreductive surgery (CRS) and heated intraperitoneal chemotherapy (HIPEC) for peritoneal mesothelioma: Canadian practices and outcomes.

INTRODUCTION: Peritoneal mesothelioma (PM) is a rare malignancy originating from the peritoneal lining. Cytoreductive surgery (CRS) and heated intraperitoneal chemotherapy (HIPEC) is the standard-of-care for patients with isolated PM. Due to a paucity of prospective data there are several different HIPEC protocols. The aims of this study are to describe the CRS and HIPEC protocols for PM and patient outcomes across Canada. METHODS: A multicenter retrospective study was performed on patients diagnosed and treated for PM with CRS and HIPEC in four major peritoneal disease centers in Canada between 2000 and 2021. Data on patient characteristics, treatment patterns, postoperative morbidity, recurrence, and survival were collected. RESULTS: A total of 72 patients were identified. Mean age was 52 years (17-75) and 37.5% were male. Epithelioid (70.1%) and multicystic (13%) mesothelioma were the most common subtypes. Twenty-one patients (30%) were treated with neoadjuvant chemotherapy. CRS and HIPEC was performed in 64 patients (91.4%). Of these, the mean PCI was 22 (2-39) and cisplatin+doxorubicin was the most common HIPEC regimen (n = 33, 51.6%). A semi-closed coliseum technique was used in 68.8% of HIPECs and the mean duration of surgery was 486 min (90-1052). Clavien-Dindo III or IV complications occurred in 12 patients (16.9%). With a median follow-up of 24 months (0.2-104.4), we found a 5-year overall survival of 61% and a 5-year recurrence-free survival of 35%. CONCLUSION: CRS and HIPEC is a safe and effective treatment modality for well-selected patients with PM, with some achieving prolonged survival.

Predictors of Small Bowel Obstruction Post-Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemotherapy.

BACKGROUND: Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS/HIPEC) for peritoneal malignancies carries considerable morbidity; however, the significance of postoperative small bowel obstruction (SBO) is not well defined. We aim to identify predictors for post-CRS/HIPEC SBO and their oncologic associations. METHODS: A retrospective review was conducted of all CRS/HIPEC cases performed at a surgical oncology center (2013-2018). Patient demographics, tumor characteristics, perioperative factors, and province-wide hospital readmissions were analyzed. Descriptive statistics were used for baseline characteristics, multivariate logistic regression for predictors of SBO at 1 year, and Kaplan-Meier method with log-rank test for survival analysis. RESULTS: A total of n = 97 CRS/HIPEC procedures were performed for diagnoses of low-grade appendiceal mucinous neoplasm (44%), high-grade appendiceal adenocarcinoma (8%), colorectal adenocarcinoma (34%), and mesothelioma (9%). The median peritoneal carcinomatosis index (PCI) score was 16. Cumulative incidence of post-CRS/HIPEC SBO readmission was 24% at 1 year and 38% at 2 and 3 years. Of 29 patients readmitted with SBO, 14 (48%) had more than one readmission for SBO, and nine surgeries were performed for obstruction. Multivariate regression identified significant independent predictors of SBO within 1-year post-CRS/HIPEC as high-grade appendiceal or colorectal primaries (odds ratio [OR] 4.58, p = 0.02) and PCI ≥ 20 (OR 3.27, p = 0.05). Overall survival (OS) was worse in patients readmitted with SBO within 1 year compared to those without (3-year OS 58% vs. 75%, p = 0.017). CONCLUSION: SBO is the most common readmission diagnosis post-CRS/HIPEC and is associated with worse survival. High-grade appendiceal and colorectal primary tumors and PCI ≥ 20 are predictors for SBO.

Tumour to tumour metastasis: case of a carotid body paraganglioma metastatic to a hepatocellular adenoma.

Tumour to tumour metastases are uncommon, and we report a case of carotid body paraganglioma metastatic to a hepatocellular adenoma. A 54-year-old man presented after a CT chest for chronic cough that incidentally identified two liver lesions in segment 3 and caudate. The imaging findings were suspicious for atypical haemangiomas versus hepatocellular adenoma. The segment 3 lesion was biopsied, demonstrating beta-catenin activated hepatocellular adenoma. He underwent partial hepatectomy with pathology showing the beta-catenin activated hepatocellular adenoma contained a central area of paraganglioma. On closer review, the patient revealed a carotid body paraganglioma with lymph node metastases requiring resection 24 years earlier. He subsequently underwent left hepatectomy including the resection bed and caudate, which confirmed the caudate lesion as metastatic paraganglioma. This case demonstrates how paraganglioma can metastasise to liver decades after initial resection and provide insight into the diagnostic workup for hepatocellular adenoma with neuroendocrine features.

Primary Care Physicians' Perspectives in Leading Breast Cancer Follow-Up Care.

INTRODUCTION: Limited data exist on the barriers associated with transitioning breast cancer follow-up care to primary care physicians (PCPs). This study aimed to describe the current perspectives of PCPs in managing breast cancer follow-up. METHOD: An online survey was distributed to PCPs in Toronto, ON, Canada. Questions examined PCPs' view of transitioning breast cancer follow-up care to their practices. RESULTS: Of 800 PCPs invited, 126 responded (response rate: 15.7%). The types of practice models amongst respondents included blended capitation (42.9%), blended salary (27%), and fee-for-service (17.5%). Seventy-seven percent of respondents stated they provided follow-up care. Approximately half of the respondents stated they were somewhat comfortable providing follow-up care. PCP-led follow-up care was considered either very (49.2%) or somewhat appropriate (30.2%). When asked about financial remuneration, 43.7% of respondents stated it was somewhat important. The factors that influenced the feasibility of PCP-led follow-up care included receipt of a detailed follow-up care plan provided by the specialist after discharge (81%), the ability to re-refer to specialists rapidly (56.3%), and the ability to obtain regular updates of best practice changes (59.5%). The preferred means of educational updates included E-mail (40.5%), continuing medical education events (30.2%), and electronic medical records (19.8%). When the fee model was taken into consideration there was no significant difference in opinions regarding follow-up care. CONCLUSIONS: Transitioning to a PCP-led model was supported by most of the PCPs who participated in this study. Their perspective on PCP-led follow up care and barriers associated with implementation of this model of care needs to be further explored with future studies that include larger sample size and a more diverse PCP population.

Thyroid and parathyroid surgeon case volume influences patient outcomes: A systematic review.

BACKGROUND: The study aim was to systematically review literature evaluating surgeon volume-outcome relationships for thyroid and parathyroid operations in order to inform surgical quality improvement initiatives. Current literature suggests surgeons who perform a high volume of thyroid and/or parathyroid operations have better outcomes than low volume surgeons, though specific volume definition are not standardized. METHODS: Eligible studies were selected through a literature search focused on the effect of surgeon volume on thyroid and parathyroid surgery patient outcomes. The literature search was conducted in accordance with the PRISMA guidelines. Publication dates extended from January 1998 to February 2021, and were limited to articles published in English. RESULTS: A total of 33 studies were included: 25 studies evaluating thyroid surgery outcomes, 4 studies evaluating parathyroid surgery outcomes, and 4 studies evaluating both thyroid and parathyroid (mixed) surgery outcomes. Higher volume thyroid and parathyroid surgeons were found to be associated with fewer surgical and medical complications, shorter length of hospital stay, and reduced total cost when compared to lower volume surgeons. This volume-outcome relationship was also found to specifically affect the complication and recurrence rates for thyroid cancer patients undergoing surgery, especially for individuals with advanced stage disease. CONCLUSION: The heterogeneity in cut-offs used for characterizing surgeons as high versus low volume, and also in subsequent patient outcome measures, limited direct study comparisons. The trend of improved patient outcomes with higher surgeon volume for both thyroid and parathyroid surgeries was consistently present in all studies reviewed.

A systematic review of global surgery partnerships and a proposed framework for sustainability.

Background: Building surgical capacity through global surgery partnerships (GSPs) between high and low- and middle-income countries (LMICs) is a rising global health focus. Our aim was to conduct a systematic review to characterize strategies employed by GSPs to build capacity and promote sustainability and to propose a novel reproducible model for sustainability. Methods: We conducted a systematic review according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. We searched PubMed, EMBASE, Medline and African Journals Online to identify all peer-reviewed articles published between 2000 and 2016 that described GSPs between partners from the United States or Canada or both and partners from LMICs. We excluded papers that described nonsurgical GSPs, unilateral GSPs (e.g., humanitarian missions) or military initiatives. Descriptive features were analyzed, with a focus on attributes that promote sustainability. We then proposed criteria for sustainability on the basis of the themes that emerged from our review. Results: Our search retrieved 3580 abstracts, which were then independently reviewed by 4 authors. A total of 128 papers (3.6%) met the inclusion criteria. They described GSPs in 68 countries on 5 continents. Among the GSPs, 21.9% demonstrated community engagement and 51.6% included multidisciplinary collaboration. Surgical training or education was provided in 81.3% of GSPs. Although 64.8% of GSPs collected data, only 53.1% reported project-related outcomes. A total of 55.5% had bilateral authorship for publications, and 28.9% had multisource funding. Only 1 GSP fulfilled all 6 of our criteria for sustainability. Conclusion: In this systematic review we identified 6 pillars that are indicators of sustainability: community engagement, multidisciplinary collaboration, education and training, outcomes reporting, bilateral authorship and multisource funding. We propose that future GSPs should build on a foundation of bilateral ideas and expertise exchange, that they should have defined and measurable objectives, that they should engage in continuous evaluation of program outcomes and that they should take a thoughtful and transparent approach to sustained capacity building.

Contexte: Le renforcement de la capacité chirurgicale au moyen de partenariats internationaux en chirurgie (PIC) entre les pays à revenu élevé et ceux à revenu faible ou intermédiaire (PRFI) prend de plus en plus de place en santé mondiale. Nous avons donc réalisé une revue systématique pour caractériser les stratégies de renforcement de la capacité et de promotion de la pérennité employées dans le cadre des PIC, ainsi que pour proposer un modèle de pérennité novateur et reproductible. Méthodes: Pour notre revue systématique, nous avons suivi le modèle Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). Nous avons interrogé les bases de données PubMed, Embase, MEDLINE et African Journals Online pour trouver tous les articles évalués par des pairs publiés entre 2000 et 2016 présentant des PIC conclus entre des organismes des États-Unis ou du Canada (ou les 2) et des organismes de PRFI. Nous avons exclu les articles portant sur des partenariats internationaux dans un domaine autre que la chirurgie, les PIC unilatéraux (p. ex., missions humanitaires) et les initiatives militaires. Nous avons analysé les caractéristiques descriptives des partenariats, en particulier les attributs favorisant leur pérennité. Nous avons ensuite proposé des critères de pérennité en fonction des thèmes dégagés dans la revue systématique. Résultats: Les 3580 résumés recensés lors de la recherche initiale ont été évalués de façon indépendante par 4 auteurs. Au total, 128 articles (3,6 %) répondaient aux critères d'inclusion. Ces articles présentaient des PIC impliquant 68 pays de 5 continents. De ces PIC, 21,9 % comportaient une mobilisation communautaire, et 51,6 %, une collaboration multidisciplinaire. Une formation ou un enseignement relatif à la chirurgie était fourni dans 81,3 % des cas. Si 64,8 % des PIC comprenaient une collecte de données, seuls 53,1 % ont produit des rapports sur les issues du projet. En tout, 55,5 % des PIC avaient conclu une entente de paternité bilatérale pour la publication, et 28,9 % avaient bénéficié d'un financement multisource. Un seul PIC répondait aux 6 critères de pérennité établis. Conclusion: Six indicateurs de pérennité ont été dégagés dans le cadre de cette revue systématique : mobilisation communautaire, collaboration multidisciplinaire, éducation et formation, production de rapports sur les issues, entente de paternité bilatérale et financement multisource. Les futurs PIC devraient reposer sur un échange d'idées et de connaissances, avoir des objectifs définis et mesurables, évaluer sans cesse les issues du programme et adopter une approche réfléchie et transparente quant au renforcement continu de la capacité.