In the United States, a rare disease is defined as a condition that affects fewer than 200,000 people in the US. There are over 7,000 identified rare diseases and disorders.Superficial Siderosis is classified as an ultra-rare disorder with less than 300 cases identified in the U.S. and a yet to be determined number worldwide.
Privacy & Cookies Policy
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.