Li-Fraumeni syndrome
mutation in p53
myriad of cancers occurring at early age in 1 family
autosomal dominant
100% penetrance by age 70
Cowden syndrome
PTEN mutation
benign and malignant breast/thyroid disease, GI polyps, oral tumors
Familial atypical mole and malignant melanoma
p16 mutation
increased melanoma and pancreas cancer