Having certain inherited disorders can increase the risk of developing parathyroid cancer. Anything that increases the chance of getting a disease is called a risk factor. Risk factors for parathyroid cancer include the following rare disorders that are inherited (passed down from parent to child): - Familial isolated hyperparathyroidism (FIHP). - Multiple endocrine neoplasia type 1 (MEN1) syndrome. Treatment with radiation therapy may increase the risk of developing a parathyroid adenoma. 
Who is at risk for Parathyroid Cancer? ?