A Case of Familial Isolated Primary Hyperparathyroidism with a Novel Gene Mutation

Familial isolated primary hyperparathyroidism (FIHP) is an autosomal dominant disorder that is characterized by an early stage of either multiple endocrine neoplasia type 1 (MEN1) or hyperparathyroidism-jaw tumor (HPT-JT) syndrome. We report here on a case of a 42-years old woman who was diagnosed with papillary thyroid cancer and primary hyperparathyroidism. Her younger brother also had primary hyperparathyroidism. On the genetic analysis, they were both proven to have a novel frameshift mutation in the MEN1 gene (exon 10).