Hereditary cancer predisposition due to variation(s) in the BARD1 gene. Germline pathogenic or likely pathogenic variants in the BARD1 gene confer a moderate risk of breast cancer, inherited in an autosomal dominant pattern, increasingly documented to be specific to triple negative breast cancer in women. BARD1 cancer susceptibility syndrome is also associated with other tumour types including neuroblastoma. The disease is Monarch Disease Ontology identifier MONDO_0700267 (BARD1-related cancer predisposition).