TP53 and peritoneum cancer: In 717 serous sub-type ovarian, Fallopian, and primary peritoneal cancer cases in Release 13 of the IARC TP53 database, 30 (4.2%) had mutations in exons 2–4, 18 had mutations affecting exon 10 alone (2.5%), and 20 (2.8%) had mutations in exons 9–11.