Myelodysplastic/Myeloproliferative Disease

Myelodysplastic/myeloproliferative diseases are a group of diseases of the blood and bone marrow in which the bone marrow makes too many white blood cells. These diseases have features of both myelodysplastic syndromes and myeloproliferative disorders. In...

Congenital Hyperinsulinism

Congenital hyperinsulinism is a condition causing abnormally high levels of insulin, a hormone that helps control blood sugar levels. People with this condition have frequent episodes of low blood sugar (hypoglycemia). In infants and young children, these episodes are...

BRCA1 Hereditary Breast and Ovarian Cancer Syndrome

BRCA1 Hereditary Breast and Ovarian Cancer Syndrome (BRCA1 HBOC) is an inherited condition that is characterized by an increased risk for a variety of different cancers. Women with this condition have a 57-60% risk of developing breast cancer, a 40-59% risk of...

Congenital Myasthenic Syndromes

The congenital myasthenic syndromes (CMS) are a diverse group of genetic disorders caused by abnormal signal transmission at the motor endplate, a special synaptic contact between motor axons and each skeletal muscle fibre. Most CMS stem from molecular defects in the...

Mucopolysaccharidosis Type 1 (MPS 1)

Mucopolysaccharidosis type 1 (MPS I) is a condition that affects many parts of the body. It is a progressively debilitating disorder; however, the rate of progression varies among affected individuals. MPS I is caused by mutations in the IDUA gene. These mutations...