Ruth Jessen Hickman, MD, is a freelance medical and science writer based in Bloomington, Indiana. Population: Roughly 1 in 200,000 people across ethnicities; may present with hemolytic anemia, macrothrombocytopenia, stomatocytes, xanthomas, and/or elevated cholesterol Treatment: Ezetimibe first line; potential adjunctive treatment with bile acid sequestrants and/or statins, other cardiovascular risk management Social media hashtags: #sitosterolemia Resources: sitosterolemiafoundation.org The rare genetic