CTX is typically a highly progressive disease, with case reports of symptoms that first appear at any time from birth through adulthood and then worsen over time. Because idiopathic bilateral cataracts occur at an early age in many children with CTX, biomarker testing of these children presents an opportunity for diagnosing children with CTX. Eligible participants will be asked to give a small blood sample and urine sample, and may have genetic testing done to see if they have the gene for CTX. This study will take place on 1 visit for approximately 30 minutes.

The goal of this study is to observe patients with Homocystinuria (CBSDH) over 3 years to learn how their disease is managed under regular circumstances. This study does not involve any investigational medications, but will provide information to researchers who are currently developing a medication to treat the disease. The study has 5 main parts, all of which are provided free of charge to participants: DXA exam, blood draws, ophthalmology exam, cognitive testing, and physical exams. To learn more about the study, please contact our team via the information listed below.

This is an observational registry study intended to document the course of Lysosomal Acid Lipase Deficiency (LALD), in order to further understand the disease, its progression, which treatments are effective, and any related complications. As an observational study, no additional study visits - outside of subjects usual Metabolism clinic visit - are required. Eligible patients will be asked to sign an informed consent form prior to enrollment and will periodically have the option of completing questionnaires about their quality of life.