Case Report: A Mutation Identified Through Next-Generation Sequencing in a Birt-Hogg-Dubè Syndrome Family.

Birt-Hogg-Dubé syndrome (BHDS) is a rare autosomal dominant inherited disorder caused by a mutation in folliculin () gene transmitted germline autosomal dominant pattern. Patients with this syndrome have an increased susceptibility to renal cell carcinoma, lung cysts, spontaneous pneumothorax, and benign skin hamartomas, and its diagnosis is not easy and consequently underestimated. Several mutations have been identified in gene, among which the majority of alterations are frameshift (insertion/deletion), nonsense, or splice-site mutations that generally produce unfunctional truncated FLCN proteins. Our aim is to present a case of a BHDS family whose proband is a 56-year-old patient who has been experiencing multiple disorders, has an genetic mutation, and has also been identified to have a pathogenic variant in gene. Our further purpose is to emphasize the importance of the next-generation sequencing (NGS) approach to identify potential multiple germline mutations in complex and rare oncologic disorders, allowing strict and more targeted cancer screening programs.