Study Status: Active, not recruiting
Recruit Status: Active, not recruiting
Study Type: Observational [Patient Registry]
Official Title: Pyruvate Kinase Deficiency (PKD) Natural History Study
Brief Summary: The purpose of this study is to describe the range and incidence of symptoms, treatments, and complications related to pyruvate kinase deficiency (PKD). Eligible patients are those of all ages with known PKD or with a hemolytic anemia and a family member with PKD. The study will collect retrospective medical history, routine clinical care data, and quality of life measures at baseline and annually for patients with PKD.