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Items: 3

1.

Potassium aggravated myotonia

A group of autosomal dominant inherited non-dystrophic myotonias caused by mutations of the SCN4A gene, resulting in sodium muscle channelopathy. They are characterized by muscle stiffness, which worsens by ingestion of potassium-rich food. This group includes myotonia fluctuans, myotonia permanens, and acetazolamide-responsive myotonia. [from NCI]

MedGen UID:
444151
Concept ID:
C2931826
Disease or Syndrome
2.

Osteoporosis with pseudoglioma

Osteoporosis-pseudoglioma syndrome is a rare condition characterized by severe thinning of the bones (osteoporosis) and eye abnormalities that lead to vision loss. In people with this condition, osteoporosis is usually recognized in early childhood. It is caused by a shortage of minerals, such as calcium, in bones (decreased bone mineral density), which makes the bones brittle and prone to fracture. Affected individuals often have multiple bone fractures, including in the bones that form the spine (vertebrae). Multiple fractures can cause collapse of the affected vertebrae (compressed vertebrae), abnormal side-to-side curvature of the spine (scoliosis), short stature, and limb deformities. Decreased bone mineral density can also cause softening or thinning of the skull (craniotabes).Most affected individuals have impaired vision at birth or by early infancy and are blind by young adulthood. Vision problems are usually caused by one of several eye conditions, grouped together as pseudoglioma, that affect the light-sensitive tissue at the back of the eye (the retina), although other eye conditions have been identified in affected individuals. Pseudogliomas are so named because, on examination, the conditions resemble an eye tumor known as a retinal glioma.Rarely, people with osteoporosis-pseudoglioma syndrome have additional signs or symptoms such as mild intellectual disability, weak muscle tone (hypotonia), abnormally flexible joints, or seizures.
[from GHR]

MedGen UID:
98480
Concept ID:
C0432252
Disease or Syndrome
3.

Achondroplasia

Achondroplasia is the most common process resulting in disproportionate small stature. Affected individuals have short arms and legs, a large head, and characteristic facial features with frontal bossing and midface retrusion (formerly known as midface hypoplasia). In infancy, hypotonia is typical, and acquisition of developmental motor milestones is often both aberrant in pattern and delayed. Intelligence and life span are usually near normal, although craniocervical junction compression increases the risk of death in infancy. [from GeneReviews]

MedGen UID:
1289
Concept ID:
C0001080
Congenital Abnormality; Disease or Syndrome
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