ABSTRACT
Introduction: In March 2020, Coronavirus Disease 2019 (COVID-19) was declared a pandemic. Elective healthcare services were reorganised worldwide. This study addresses the impact of measures taken in the early stages of the pandemic on diagnosing Upper Gastrointestinal (UGI) and Hepatopancreaticobiliary (HPB) malignancies in a university teaching hospital. Aims: To ascertain whether fewer cases of UGI/HPB cancers were detected, the differences in inpatient and outpatient diagnosis and whether there was an increased detection of later stage disease during the pandemic than in the preceding year. Methods: This was a retrospective cohort study conducted in Tallaght University Hospital in Ireland. All new diagnoses of UGI/HPB cancers, excluding hepatocellular carcinomas, are managed at a weekly Multidisciplinary Team (MDT) meeting. Data was retrieved from the MDT database and medical records and analysed using IBM SPSS Statistics V20. Results: 111 cases were detected. There was no significant difference in the proportion of cases detected in the overall post-COVID period (n=53, 47.7%) compared to the Pre-COVID period (n=58, 52.3%) (p=0.7884). When COVID-19 cases were at their highest levels in Ireland, we observed a significant drop in new UGI/HPB cases detected compared to the pre-COVID period. This was mitigated in the third quarter of 2020, when transmission was depressed and a sharp increase in detection of UGI/HPB cases was observed. The variance of distribution of cases per quarter in the two periods was statistically significant with a P-value of 0.0001. There was a non-significant trend towards fewer diagnoses of early cancer (stage ≤2) in the Post- COVID period (21% v 26%) (p=0.6416). The proportion of patients diagnosed as an inpatient did not differ between the two periods, p=.739. Discussion: As fears about aerosolization abated, endoscopy services quickly increased the number of scopes performed after the initial reduction at the start of the pandemic. There are several limitations to this study, however it does lead us to conclude that our fears regarding cancer diagnosis in the postpandemic period did not materialise. It also offers solace that when transmission of COVID- 19 is depressed, as it was in Ireland in Q3 2020 before the peak of the second wave in Q4 2020, that outpatient services can quickly escalate their level of activity and detect cancers that were missed with no significant change in stage. A further observation is that when lockdown measures in Ireland were reintroduced in winter 2020/2021 but outpatient services were kept open, a similar reduction in detections was observed compared to when they were closed. Therefore, the question may be posed if the primary driver of reduced detection of UGI/HPB cancers is primary care services being overwhelmed with pandemic work rather than a reduction in outpatient services . (Table Presented) (Figure Presented)