Constitutional mismatch repair deficiency in childhood colorectal cancer harboring a de novo variant in the MSH6 gene: a case report. - Hizuka, Keinosuke; Hagiwara, Shin-ichiro; Maeyama, Takatoshi; Honma, Hitoshi; Kawai, Masanobu; Akagi, Kiwamu; Yasuhara, Michiko; Tomita, Naohiro; Etani, Yuri (BMC Gastroenterology, 2021)