Genzyme makes it way battling uncommon diseases. The company's product portfolio focuses on treatments for multiple sclerosis and rare diseases, including genetic, endocrine, and cardiovascular disease. One of its main products, Cerezyme, is a leading (and pricey) treatment for Gaucher disease, a rare enzyme-deficiency condition. Founded in 1981, Genzyme has treatments for other enzyme disorders including Fabry disease and Pompe disease. In addition, the company conducts research in heart and kidney disease as well as other areas; resulting products would be commercialized by its parent. With operations in the US and Europe, Genzyme is owned by French pharmaceutical firm Sanofi.