A rare cancer is defined as a type that affects fewer than 200,000 people in the U.S. annually. Rare cancers can be challenging to diagnose and treat due to limited research and resources. Examples include adrenocortical carcinoma, Merkel cell carcinoma, and gastrointestinal stromal tumors. NORD plays a crucial role in providing resources and advocacy for patients and families dealing with these uncommon cancers.
