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1.

Atrophy

Decrease in the size of a cell, tissue, organ, or multiple organs, associated with a variety of pathological conditions such as abnormal cellular changes, ischemia, malnutrition, or hormonal changes. [from MeSH]

MedGen UID:
83084
Concept ID:
C0333641
Pathologic Function
2.

Charcot-Marie-Tooth disease

Charcot-Marie-Tooth (CMT) hereditary neuropathy refers to a group of disorders characterized by a chronic motor and sensory polyneuropathy. The affected individual typically has distal muscle weakness and atrophy often associated with mild to moderate sensory loss, depressed tendon reflexes, and high-arched feet. [from GeneReviews]

MedGen UID:
2980
Concept ID:
C0007959
Disease or Syndrome
3.

Spinal muscular atrophy

Muscular weakness and atrophy related to loss of the motor neurons of the spinal cord and brainstem. [from HPO]

MedGen UID:
506049
Concept ID:
CN006358
Finding
4.

Skeletal muscle atrophy

The presence of skeletal muscular atrophy (which is also known as amyotrophy). [from HPO]

MedGen UID:
505481
Concept ID:
CN002890
Finding
5.

Charcot-Marie-Tooth disease type 2D

GARS-associated axonal neuropathy (Charcot-Marie-Tooth neuropathy type 2D/distal spinal muscular atrophy V [CMT2D/dSMA-V]) is characterized by adolescent or early-adult onset of bilateral weakness and atrophy of thenar and first dorsal interosseus muscles, sparing of the hypothenar eminence until later in the course of illness, and mild to moderate impairment of vibration sense in the hands and feet later in the disease course in a minority of individuals. The phenotype is considered the CMT2D subtype when sensory deficits (reduction of pinprick, temperature, touch, and vibration perception in a stocking and [less often] glove pattern) are present and dSMA-V when sensory deficits are absent. The lower limbs are involved in about half of affected individuals. The earliest elicited manifestations in many individuals are transient cramping and pain in the hands on exposure to cold and cramping in calf muscles on exertion. [from GeneReviews]

MedGen UID:
316946
Concept ID:
C1832274
Disease or Syndrome
6.

Spinal muscular atrophy

Spinal muscular atrophy (SMA) is characterized by progressive muscle weakness resulting from degeneration and loss of the anterior horn cells (i.e., lower motor neurons) in the spinal cord and the brain stem nuclei. Onset ranges from before birth to adolescence or young adulthood. Poor weight gain, sleep difficulties, pneumonia, scoliosis, and joint contractures are common complications. Before the genetic basis of SMA was understood, it was classified into clinical subtypes; however, it is now apparent that the phenotype of SMA associated with disease-causing mutations of SMN1 spans a continuum without clear delineation of subtypes. Nonetheless, classification by age of onset and maximum function achieved is useful for prognosis and management; subtypes include: SMA 0 (proposed), with prenatal onset and severe joint contractures, facial diplegia, and respiratory failure; SMA I, with onset before age six months; SMA II, with onset between age six and 12 months; SMA III, with onset in childhood after age 12 months and ability to walk at least 25 meters achieved; and SMA IV, with adult onset. [from GeneReviews]

MedGen UID:
7755
Concept ID:
C0026847
Disease or Syndrome
7.

Inborn genetic diseases

Diseases that are caused by genetic mutations present during embryo or fetal development, although they may be observed later in life. The mutations may be inherited from a parent's genome or they may be acquired in utero. [from MeSH]

MedGen UID:
181981
Concept ID:
C0950123
Disease or Syndrome
8.

Congenital anomaly of nervous system

An abnormality of the nervous system that is present at birth or detected in the neonatal period. [from NCI]

MedGen UID:
105425
Concept ID:
C0497552
Congenital Abnormality; Disease or Syndrome
9.

Polyneuropathy

A generalized disorder of peripheral nerves. [from HPO]

MedGen UID:
57502
Concept ID:
C0152025
Disease or Syndrome
10.

Hereditary motor and sensory neuropathy

A group of slowly progressive inherited disorders affecting motor and sensory peripheral nerves. Subtypes include HMSNs I-VII. HMSN I and II both refer to CHARCOT-MARIE-TOOTH DISEASE. HMSN III refers to hypertrophic neuropathy of infancy. HMSN IV refers to REFSUM DISEASE. HMSN V refers to a condition marked by a hereditary motor and sensory neuropathy associated with spastic paraplegia (see SPASTIC PARAPLEGIA, HEREDITARY). HMSN VI refers to HMSN associated with an inherited optic atrophy (OPTIC ATROPHIES, HEREDITARY), and HMSN VII refers to HMSN associated with retinitis pigmentosa. (From Adams et al., Principles of Neurology, 6th ed, p1343) [from MeSH]

MedGen UID:
45066
Concept ID:
C0027888
Disease or Syndrome
11.

Motor neuron disease

Diseases characterized by a selective degeneration of the motor neurons of the spinal cord, brainstem, or motor cortex. Clinical subtypes are distinguished by the major site of degeneration. In AMYOTROPHIC LATERAL SCLEROSIS there is involvement of upper, lower, and brainstem motor neurons. In progressive muscular atrophy and related syndromes (see MUSCULAR ATROPHY, SPINAL) the motor neurons in the spinal cord are primarily affected. With progressive bulbar palsy (BULBAR PALSY, PROGRESSIVE), the initial degeneration occurs in the brainstem. In primary lateral sclerosis, the cortical neurons are affected in isolation. (Adams et al., Principles of Neurology, 6th ed, p1089) [from MeSH]

MedGen UID:
38785
Concept ID:
C0085084
Disease or Syndrome
12.

Peripheral neuropathy

Your peripheral nerves are the ones outside your brain and spinal cord. Like static on a telephone line, peripheral nerve disorders distort or interrupt the messages between the brain and the rest of the body. . There are more than 100 kinds of peripheral nerve disorders. They can affect one nerve or many nerves. Some are the result of other diseases, like diabetic nerve problems. Others, like Guillain-Barre syndrome, happen after a virus infection. Still others are from nerve compression, like carpal tunnel syndrome or thoracic outlet syndrome. In some cases, like complex regional pain syndrome and brachial plexus injuries, the problem begins after an injury. Some people are born with peripheral nerve disorders. Symptoms often start gradually, and then get worse. They include . - Numbness. - Pain. - Burning or tingling. - Muscle weakness. - Sensitivity to touch. Treatment aims to treat any underlying problem, reduce pain and control symptoms. NIH: National Institute of Neurological Disorders and Stroke.  [from MedlinePlus]

MedGen UID:
18386
Concept ID:
C0031117
Disease or Syndrome
13.

Myelopathy

Your spinal cord is a bundle of nerves that runs down the middle of your back. It carries signals back and forth between your body and your brain. It is protected by your vertebrae, which are the bone disks that make up your spine. If you have an accident that damages the vertebrae or other parts of the spine, this can also injure the spinal cord. Other spinal cord problems include. - Tumors. - Infections such as meningitis and polio. - Inflammatory diseases. - Autoimmune diseases . - Degenerative diseases such as amyotrophic lateral sclerosis and spinal muscular atrophy. Symptoms vary but might include pain, numbness, loss of sensation and muscle weakness. These symptoms can occur around the spinal cord, and also in other areas such as your arms and legs. Treatments often include medicines and surgery. .  [from MedlinePlus]

MedGen UID:
11550
Concept ID:
C0037928
Disease or Syndrome
14.

Neuromuscular Diseases

Neuromuscular disorders affect the nerves that control your voluntary muscles. Voluntary muscles are the ones you can control, like in your arms and legs. Your nerve cells, also called neurons, send the messages that control these muscles. When the neurons become unhealthy or die, communication between your nervous system and muscles breaks down. As a result, your muscles weaken and waste away. The weakness can lead to twitching, cramps, aches and pains, and joint and movement problems. Sometimes it also affects heart function and your ability to breathe. Examples of neuromuscular disorders include. -Amyotrophic lateral sclerosis. -Multiple sclerosis. -Myasthenia gravis. -Spinal muscular atrophy. Many neuromuscular diseases are genetic, which means they run in families or there is a mutation in your genes. Sometimes, an immune system disorder can cause them. Most of them have no cure. The goal of treatment is to improve symptoms, increase mobility and lengthen life.  [from MedlinePlus]

MedGen UID:
10323
Concept ID:
C0027868
Disease or Syndrome
15.

Disorder of the central nervous system

A structural abnormality of the central nervous system. [from HPO]

MedGen UID:
3306
Concept ID:
C0007682
Disease or Syndrome
16.

Peripheral axonal atrophy

Atrophic changes of axons of the peripheral nervous system. [from HPO]

MedGen UID:
871146
Concept ID:
C4025619
Disease or Syndrome
17.

Dejerine-sottas neuropathy, autosomal dominant

MedGen UID:
864465
Concept ID:
C4016028
Finding
18.

Charcot-Marie-Tooth disease, axonal type

MedGen UID:
833706
Concept ID:
CN230012
Finding
19.

Distal hereditary motor neuronopathy 2D

Distal hereditary motor neuronopathy type IID is an autosomal dominant neurologic disorder characterized by onset of slowly progressive distal lower limb weakness and atrophy between the second and fourth decades of life. Weakness usually begins in the calf muscles and later involves more proximal muscles. The severity is variable, and some patients have difficulty walking or running. Most also have upper limb involvement, particularly of the triceps and intrinsic hand muscles. Some patients may lose independent ambulation later in the disease course. Sensory impairment is typically not present, and cognition and bulbar function are normal (summary by Sumner et al., 2013). For a general phenotypic description and a discussion of genetic heterogeneity of distal HMN (dHMN), see HMN type I (HMN1; 182960). [from OMIM]

MedGen UID:
777992
Concept ID:
C3711384
Disease or Syndrome
20.

Peripheral axonal atrophy

Atrophic changes of axons of the peripheral nervous system. [from HPO]

MedGen UID:
505528
Concept ID:
CN003054
Finding
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