Trends in spinal cancers: Primary & metastatic. An Irish epidemiological perspective.

Background: The incidence and histological type of spinal cancer is diverse. It is our role as physicians to explore the epidemiology of spinal cancers so that several projections can be made. Resource allocation, cost analyses, and the requirement of rehabilitation facilities all need to be considered.The objective of this paper is to provide an account of the acute spinal oncological admissions to the National Spinal Injuries Unit (NSIU) in both 2010 and 2020 with the hypothesis that upward trends will be noted. Only by exemplifying this trend, will it highlight the need to give spinal cancer the attention it deserves in the Republic of Ireland. Methods: All patients who were to undergo spinal surgery for primary or metastatic spinal cancer in the Mater Misericordiae University Hospital (MMUH) in 2010 and 2020 were included in this retrospective cohort study. A list of medical record numbers (MRNs) for all patients who underwent spinal surgery in the MMUH were included. Data pertaining to patient demographics were noted. Results: 90 patients were included in this retrospective cohort study. 37 patients in 2010, had increased to 53 by 2020. Metastatic disease to the spine was still the most prominent reason for referral. The most common spinal region affected was the thoracic spine. Breast cancer was the most prevalent metastatic cancer to the spine in 2010. Lung cancer became the most prevalent by 2020. Posterior spinal fusion was the most frequent surgical procedure performed. The length of stay in higher care facilities decreased from 5.4 days in 2010, to 4 days in 2020. Decreased were also seen in the mean length of hospital stay, plummeting from 23.6 days in 2010, to 7.6 days in 2020. The same could not be said for the 30-day mortality rate, increasing from 5.4% in 2010, to 9.4% in 2020. Conclusion: The results of this study show a substantial rise in the incidence and prevalence of both primary and metastatic spinal disease here in Ireland. One can see clear improvements in operative technique, with less patients proceeding to higher levels of post-operative care, and earlier discharge times. This data can be used for future planning. The paper highlights the economic cost of spinal oncological care, but it also identifies key areas where preventative campaigns can be targeted.