Introduction: The COVID-19 pandemic has significantly impacted all public life and the global economy. Since its discovery, the disease has spread rapidly, which led to an unprecedented public health crisis and the adoption of extreme measures to limit community and hospital spread. As a result of a confluence of extraordinary circumstances caused by this pandemic, the doctrines of treatment for patients with head and neck carcinoma had to be reanalyzed, guaranteeing the well-being of both patients and health professionals as well as society itself.
Objective: The aim of our systematic review was to study the impact of the COVID-19 pandemic period on head and neck cancer patients, the effects on the health care provided and on patient health.
Materials and methods: This systematic review was based on the PRISMA guidelines and PICO strategy, with the focus question, "How has the COVID-19 pandemic period conditioned the treatment of patients with head and neck carcinoma?" Thus, electronic research was carried out on six databases: LILACS, PubMed/MedLine, Web of Science, the Cochrane COVID-19 Study Register, Scielo, and Scopus, aiming to answer the research question by considering the objective and defined criteria. The following information was extracted: author and year of the publication, patients' age, gender, time until the first appointment, time from the first appointment to the surgery, the period in the hospital, time in intensive care, TNM, general stage of cancer, diagnostic procedures, oncological procedures, reconstructive surgery, and postoperative complications.
Results: Initially, 837 articles were found. After removing duplicates, we obtained 471 studies. After screening by title and abstract, 67 articles were selected for full-text reading (k = 92) in order to assess their eligibility. Thus, nine articles were included (k = 1.0). All data and statistical results were obtained and contrasted. The included studies made it possible to reveal distinct impacts felt in different institutions of several countries, not allowing generalizable conclusions to be drawn. However, some of the variables analyzed are worrying, namely, the limitations that occurred in some types of oncological surgeries, as well as the increase in the number of patients admitted with higher TNM classifications and more debilitated general conditions.
Conclusion: Within the limitation of this review, the results showed efforts made to prevent the pandemic from affecting the healthcare provided. There were no significant differences in days inside the intensive care unit, postoperative complications, and, in most cases, length of stay in the hospital. There were no differences in the number of patients admitted with a history of recurrence or neoadjuvant treatment. However, some variables raise concerns, such as the increase in patients with more advanced stage and TNM classification and a decrease in certain oncological procedures.
Keywords: COVID-19; consequences; head and neck cancer; impact; life; treatment.