NCIt definition : A rare genetic syndrome with an autosomal dominant pattern of inheritance. It is caused
by a mutation in the FLCN gene which encodes the protein folliculin. Clinical signs
include multiple benign growths of the skin and lungs that begin to manifest in the
second or third decade of life. The clinical course is characterized by the progressive
growth of new and existing neoplasms. In those with mutations in both copies of FLCN,
the kidneys may also be affected by the growth of benign or malignant neoplasms.;
Alternative definition : NCI-GLOSS: An inherited condition in which benign tumors develop in hair follicles
on the head, chest, back, and arms. People who have this disorder may be at increased
risk of developing colon or kidney cancer.;