Any Fanconi anemia in which the cause of the disease is a mutation in the RAD51C gene. The disease is Fanconi anemia complementation group O (MONDO_0013248, a Monarch Disease Ontology identifier). Also known as: FANCO, Fanconi Anemia, complementation group type O, Fanconi anaemia caused by mutation in RAD51C, Fanconi anaemia caused by mutation in Rad51C, Fanconi anaemia complementation group type O, Fanconi anemia caused by mutation in RAD51C, Fanconi anemia caused by mutation in Rad51C, Fanconi anemia complementation group type O.