Pantothenate Kinase-Associated Neurodegeneration (PKAN)

Overview Pantothenate kinase-associated neurodegeneration (PKAN), also known as neurodegeneration with brain iron accumulation 1 (NBIA1) and formerly called Hallervorden–Spatz syndrome (use of this eponym is somewhat discouraged due to Hallervorden and Spatz’s...

X-linked Juvenile Retinoschisis

Overview X-linked juvenile retinoschisis (XLRS) is a genetic ocular disease characterized by reduced visual acuity in males due to juvenile macular degeneration. Symptoms X-linked juvenile retinoschisis  manifests with poor vision and reading difficulties. In severe...

Acid Sphingomyelinase Deficiency (ASMD)

Overview Acid Sphingomyelinase Deficiency (ASMD), also known as Niemann-Pick Disease Types A (NPD A) and Type B (NPD B), is a rare lysosomal storage disease. It is a serious and potentially life-threatening genetic disorder that causes accumulation of the...

Challenges of Diagnosing Rare Diseases

Amit Rakhit, MD, Chief Medical and Portfolio Officer of Ovid Therapeutics, discusses the challenges of diagnosing rare disorders in general, and Fragile X and Angelman syndromes specifically. Family physicians, pediatricians, and other primary health care...