MedGen

Segmental odontomaxillary dysplasia (SOD) is a rare disorder characterized by unilateral enlargement of the right or left maxillary alveolar bone and gingiva in the region from the back of the canines to the maxillary tuberosity. In the enlarged region, dental abnormalities such as missing teeth, abnormal spacing and delayed eruption occur. [from ORDO]

Septooptic dysplasia is a clinically heterogeneous disorder loosely defined by any combination of optic nerve hypoplasia, pituitary gland hypoplasia, and midline abnormalities of the brain, including absence of the corpus callosum and septum pellucidum (Dattani et al., 1998). The diagnosis of this rare congenital anomaly is made when 2 or more features of the classic triad are present. Approximately 30% of patients have complete manifestations, 62% display hypopituitarism, and 60% have an absent septum pellucidum. The disorder is equally prevalent in males and females and is more common in infants born to younger mothers, with a reported incidence of 1 in 10,000 live births (summary by Webb and Dattani, 2010). Also see 516020.0012 for a form of septooptic dysplasia associated with cardiomyopathy and exercise intolerance. [from OMIM]

A rare, small-vessel vasculitis characterized by skin purpura, arthritis, abdominal and/or renal involvement, IgA tissue deposits (arterioles, capillaries, and venules) and circulating IgA immune complexes. [from ORDO]

A genetically and clinically heterogeneous group of slowly progressive neurological disorders which in the pure form is characterized by pyramidal signs (weakness, spasticity, brisk tendon reflexes, and extensor plantar responses) predominantly affecting the lower limbs and with possible association of sphincter disturbances and deep sensory loss; and in the complex form by the addition of variable neurological or non-neurological features. [from ORDO]