The Epidemiology and Clinicopathological Features of Basal Cell Carcinoma in Patients 80 Years and Older: A Systematic Review.

Importance: The number of very elderly (≥80 years) is rapidly growing worldwide. Basal cell carcinoma (BCC) are common in this age group and treatment is often challenging in this population. Objective: Obtaining an overview of the epidemiology and clinicopathological features of BCC in the very elderly to guide clinicians and policy makers. Evidence Review: A systematic review of literature was performed using PubMed, Excerpta Medica Database (EMBASE), and the Cochrane Library. Study selection, quality assessment, and data extraction was performed by 2 independent reviewers. For quality assessment (including the risk of bias) the STrengthening the Reporting of OBservational studies in Epidemiology (STROBE) checklist was used, combined with the Quality Rating Scheme for Studies and Other Evidence. Data were described though a narrative synthesis and tabulation. Findings: Of 13 628 studies identified, 83 studies were included and quality assesment was performed for 76 studies; 27 studies (representing >350 000 patients) were found that included age-specific incidence rates of BCC in the very elderly. High and increasing incidence rates of BCC in the very elderly were found ranging from 13 to 12 112 per 100 000 person-years, strongly depending on factors like study population and clinical setting. Basal cell carcinoma in the very elderly were more common in men, mostly of the nodular subtype, and located in the head and neck region. Interpretation and generalization of the data was limited by the heterogeneity of study populations, methods, and outcomes. Data concerning impact on health-related quality of life (HRQoL) and prognostication were scarce. Conclusions and Relevance: The incidence of BCC among the very elderly is high and increasing. Epidemiologic and clinicopathological data from current literature provide only limited guidance in clinical decision making owing to heterogeneity and scarcity. Future research should focus more specifically on BCC in the very elderly, together with prognostication and their relation with HRQoL in both the short and longer term.