The Ethics Committee of the Jikei University School of Medicine approved the case report with written informed consent from our patient. In the review of the case series, we searched for case reports of SCL between 1979 and 2022 in the Japan Medical Abstracts Society, a database of Japanese medical literature. We collected data including age, sex, the period from perception of the tumor to the first hospital visit, the site of occurrence, size, heterogeneity in imaging examinations, enhancement on enhanced imaging, the presence or absence of a capsule in macroscopic findings, the presence or absence of recurrence, and a follow-up period.

A statistical analysis was performed using the commercial software, SPSS (IBM, Armonk, NY). A linear regression analysis was conducted to investigate the relationships between two types of quantitative parameters. The Mann-Whitney U test was used to examine differences in quantitative parameters between two groups. Pearson’s chi-square test was employed to analyze differences among qualitative parameters.P ≤0.05 was considered to be significant.