Among these cases, eight were incidental findings, as the mutated gene is associated with cancer risks different from breast cancer, such as Lynch syndrome (n = 5 PMS2), Birt–Hogg–Dube syndrome (n = 1 FLCN), susceptibility to malignant cutaneous melanoma (n = 1 MITF), and hereditary paraganglioma and pheochromocytoma (n = 1 SDHB). The gene discussed is FLCN; the disease is breast cancer.