Gaik Tin Quah

BACKGROUND: The COVID-19 pandemic has challenged cancer care globally, introducing resource limitations and competing risks into clinical practice. AIMS: To describe the COVID-19 impact on medical oncology care provision in an Australian setting. METHODS: Calvary Mater Newcastle and Newcastle Private Hospital medical oncology data from 1 February to 31 April 2019 versus 2020 were retrospectively analysed. RESULTS: Three hundred and sixty-four inpatient admissions occurred in 2020, 21% less than in 2019. Total inpatient days decreased by 22% (2842 vs 2203). April was most impacted (36% and 44% fewer admissions and inpatient days respectively). Mean length of stay remained unchanged (6.4 vs 6.2 days, P = 0.7). In all, 5072 outpatient consultations were conducted, including 417 new-patient consultations (4% and 6% increase on 2019 respectively). Telephone consultations (0 vs 1380) replaced one-quarter of face-to-face consultations (4859 vs 3623, -25%), with minimal telehealth use (6 vs 69). Day Treatment Centre encounters remained stable (3751 vs 3444, -8%). The proportion of new patients planned for palliative treatment decreased (35% vs 28%, P = 0.04), observation increased (16% vs 23%, P = 0.04) and curative intent treatment was unchanged (both 41%). Recruiting clinical trials decreased by one-third (45 vs 30), two trials were activated (vs 5 in 2019) and 45% fewer patients consented to trial participation (62 vs 34). CONCLUSION: Our medical oncology teams adapted rapidly to COVID-19 with significant changes to care provision, including fewer hospital admissions, a notable transition to telephone-based outpatient clinics and reduced clinical trial activity. The continuum of care was largely defended despite pandemic considerations and growing service volumes.

Abstract Background Oesophageal and gastrooesophageal junction (GOJ) carcinoma frequently present with dysphagia and de novo metastatic disease. There is scope to improve treatment paradigms to both address symptoms and improve survival. One method is integrating immune checkpoint inhibition with novel treatment combinations. Methods PALEO is a single arm, phase II clinical trial in patients with previously untreated, oligometastatic or locoregionally advanced oesophageal or GOJ carcinoma and dysphagia. PALEO is sponsored by the Australasian Gastro-Intestinal Trials Group (AGITG). Participants receive 2 weeks of therapy with concurrent hypofractionated radiotherapy of 30Gy in 10 fractions to the primary tumour, weekly carboplatin AUC2, weekly paclitaxel 50 mg/m 2 and durvalumab 1500 mg q4 weekly, followed by durvalumab monotherapy continuing at 1500 mg q4weekly until disease progression, unacceptable toxicity or 24 months of therapy. A single metastasis is treated with stereotactic radiotherapy of 24Gy in 3 fractions in week 7. The trial primary endpoint is the progression free survival rate at 6 months. Secondary endpoints include duration of dysphagia relief, nutritional status change, quality of life, response rate, toxicity, progression free survival and overall survival. The tertiary endpoint is prediction of outcome based on biomarkers identified from patient serial blood samples collected pre- and post-radiotherapy. Discussion This unique investigator-initiated clinical trial is designed to simultaneously address the clinically relevant problems of dysphagia and distant disease control. The overarching aims are to improve patient nutrition, quality of life and survival with low toxicity therapy. AGITG PALEO is a multidisciplinary collaboration and will add to the understanding of the relationship between radiotherapy and the anti-tumour immune response. Trial registration Australian and New Zealand Clinical Trials Registry: ACTRN12619001371189 , registered 8 October 2019.

6600 Background: Cancer treatment has evolved rapidly since the advent of immunotherapy (checkpoint inhibitors). As compared to chemotherapy, immunotherapy is associated with a more favourable but distinct side effect profile. Mortality within 30 days of chemotherapy in cancer patients has been accepted as a clinical indicator of preventable harm and used as an auditing tool for clinical practice and improving quality of life. This should be investigated in the current era of immunotherapy, as it has been the standard treatment for advanced melanoma, lung cancer, renal cell cancer and others. Methods: We conducted a retrospective study on patients with advanced cancer treated with immunotherapy and died within 30 days of treatment. Clinical data on patients treated with immunotherapy at Calvary Mater Newcastle between 2006 and 2018 was collected. Data were compared with 30-day mortality statistics of chemotherapy. Results: A total of 601 metastatic cancer patients received immunotherapy agents (Pembrolizumab, Nivolumab, Ipilimumab, Atezolizumab, Tislelizumab and MSB0011359C) on 5022 occasions. Seventy-six (12.6%) patients died within 30 days of receiving immunotherapy. Median age was 68 years (35-90). Melanoma was the most prevalent cancer type (63%) followed by lung (20%). Forty-seven (47%) of patients received immunotherapy as first-line treatment and 39% as second-line. Patients died within 30 days received an average 2 (1-16) immunotherapy doses. A quarter of patients had ECOG 3 and ECOG 4 before last dose. Majority of deaths were related to disease (86%). Nearly 80% of patients died in hospital. One patient died due to treatment-related pneumonitis. In univariate analysis, there was no association between mortality and patients’ demographic variables such as age, sex, BMI, cancer type, ECOG performance status, immunotherapy agent and prior treatment. Conclusions: To our knowledge, this is the first ever real-world data on 30-day mortality after immunotherapy in advanced cancer. Thirty-day mortality rates were comparable to published data on patients treated with chemotherapy. Results emphasise significance of careful selection of advanced cancer patient for immunotherapy. Due to small sample size, the power to detect a significant association between patients demographics and survival is reduced.