mu chain disease

A heavy chain disease that results from an overproduction of mu antibody (IgM).

agammaglobulinemia 1

An agammaglobulinemia that has_material_basis_in homozygous or compound heterozygous mutation in the mu heavy-chain gene (IGHM) on chromosome 14q32.

progressive multifocal leukoencephalopathy

A viral infectious disease that involves reactivation of JC polyomavirus in immune-compromised individuals which causes the loss of white matter (which is made up of myelin, a substance the surrounds and protects nerve fibers) in multiple areas of the brain. The symptoms include hemiparesis, aphasia, dysarthria, hemianopia, cognitive impairment and coma.

autosomal dominant thrombophilia due to protein S deficiency

A protein S deficiency characterized by reduced serum protein S levels and recurrent venous thrombosis that has_material_basis_in heterozygous mutation in the PROS1 gene on chromosome 3q11.1.

sickle cell disease

A blood protein disease that is characterized by chronic hemolytic anemia and intermittent vaso-occlusive events that result in tissue ischemia leading to acute and chronic pain as well as organ damage that can affect any organ system, resulting from the replacement of one of the beta-globin subunits in hemoglobin with atypical hemoglobin molecules called hemoglobin S which can distort red blood cells into a sickle or crescent shape. Sickle cell disease subtypes should include a detailed genotypic description for the hemoglobin molecules (e.g., Hb S/S, Hb S/C, Hb S/0-thalassemia).

Charcot-Marie-Tooth disease intermediate type

A Charcot-Marie-Tooth disease characterized by motor conduction velocities above and below 38 m/s.

Moebius syndrome

A facial nerve disease characterized by congenital, uni- or bilateral, non-progressive facial weakness and limited abduction of the eye(s).

autosomal recessive thrombophilia due to protein S deficiency

A protein S deficiency characterized by thrombosis and secondary hemorrhage usually beginning in early infancy that has_material_basis_in homozygous or compound heterozygous mutation in the PROS1 gene on chromosome 3q11.1.

refractive amblyopia

An amblyopia that is characterized by refractive error in one or both eyes that is not corrected early in childhood resulting in poor development of the visual function in the affected eye(s).

sickle cell anemia

A sickle cell disease that is characterized by the replacement of both of the beta-globin subunits in hemoglobin with hemoglobin S, resulting in a low number of red blood cells, repeated infections, and periodic episodes of pain.