Talk:Congenital distal spinal muscular atrophy

Course assignment
AshleyHardy (talk) 15:17, 19 November 2013 (UTC)

Article assessment by fellow class member
Really great article! Included pictures were a fantastic addition, just make sure to hit the minimum bytes for the final article. ___________ Total: 17 out of 20 Reviewed by KelseyGratton (talk) 21:16, 20 November 2013 (UTC)
 * 1) Quality of Information: 2
 * 2) Article size: 1 *As of November 18, article was 1,100 bytes short of minimum.
 * 3) Readability: 1 *Some sections such as Pathophysiology, Mechanism, etc. were too technical - laypeople need to be able to read it.
 * 4) Refs: 2
 * 5) Links: 2
 * 6) Responsive to comments: 2 *No comments on page yet.
 * 7) Formatting: 2
 * 8) Writing: 1  *Contained a few typos, grammar/syntax mistakes, and one link included an underscore (club_foot)
 * 9) Used real name or has real name on User TALK page: 2
 * 10) Outstanding: 2
 * The assessment above is provided by a fellow class member on an educational assignment (hence, COI), and IMO does not reflect at all on the quality of this article relative to Wikipedia's internal assessment processes. I do not believe COI external reviews are helpful here.  Sandy Georgia  (Talk) 15:14, 22 November 2013 (UTC)

Make sure to exceed the 15,000 byte limit. Hasn't responded to comment from three days ago/ I feel there should be added information under several headings, including the subheadings under the 'Related Disorders Involving the TRPV4 Gene' section. I feel once there is a bit more information and exceeds the byte limit, you will be good to go!!
 * 1) Quality of Information: 2
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 * 2) Refs: 2 (several sources within the past few years)
 * 3) Links: 2 (a great deal of linked wiki pages)
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 * 1) Formatting: 2 (great headings and flow of contents)
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 * 1) Used real name or has real name on User TALK page: 2
 * 2) Outstanding?:1

Total: 16 out of 20 Allison gainer (talk) 14:50, 25 November 2013 (UTC)

It was a great article. The info you added looks awesome! Total: 19 out of 20 Ruthfogg (talk) 14:50, 25 November 2013 (UTC)
 * 1) Quality of Information: 2
 * 2) Article size: 1 too short
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 * 9) Used real name or has real name on User TALK page: 2
 * 10) Outstanding?:2

Moved
Moved from article, per WP:MEDMOS, why are other conditions developed here rather than in their own articles? Sandy Georgia (Talk) 19:12, 16 December 2013 (UTC)

Related disorders involving the TRPV4 gene
Mutations on the TRPV4 gene can cause different, but very similar spinal muscular atrophies (SMA) of the peripheral nervous system. Other skeletal dysplasias can also be the result of a mutation on the TRPV4 gene. The mutations can occur at different alleles that have been linked to scapuloperoneal spinal muscular atrophy (SPSMA) and hereditary motor and sensory neuropathy 2C (HMSN2C), which are forms of SMAs. The related skeletal dysplasias include brachyolmia, spondylometaphyseal dysplasia Kozlowski type, and nonlethal metatropic dysplasia. All of these disorders exhibit overlapping symptoms, as well as unique ones that set them apart from the others.

Scapuloperoneal spinal muscular atrophy (SPSMA)
Scapuloperoneal weakness and atrophy, vocal cord paralysis, laryngeal palsy, along with complete absence of some muscle groups are all typical features of SPSMA. Males are more affected than females, and later generations have increased disease expression, suggesting genetic anticipation.

Hereditary motor and sensory neuropathy 2C (HMSN2C)
Hereditary motor and sensory neuropathy 2C, commonly known as Charcot-Marie-Tooth disease is also a result of a mutation of the TRPV4 gene. Signs and symptoms include distal muscle weakness and wasting in the limbs, distal sensory loss, vocal cord paralysis, and weakness of the diaphragm and intercostal muscles. Onset varies greatly from childhood to 30 years of age, with prognosis mainly due to respiratory complications.

Brachyolmia
Features of brachyolmia include short trunk, scoliosis, and mild short stature. The autosomal dominant form of brachyolmia is linked to a mutation on the TRPV4 gene located on chromosome 12q24.1-12q24.2 that causes a toxic gain-of function. Further features include radiological involvement of the spine and no significant abnormalities of the long bones. No metaphyseal changes are characteristic of the disease. Brachyolmia is said to be one of the mildest forms of skeletal dysplasia.

Spondylometaphyseal dysplasia of Kozlowski type (SMDK)
Affected individuals typically have short trunk and short stature, in addition to bowlegs and a waddling gait. Kyphoscoliosis is common and the thorax is generally short and broad. Further features include severe flattening of the spinal bones (platyspondyly), and metaphyseal dysplasia. Medially placed vertebral pedicles are common distinguishing features in SMDK patients; as well as metaphyseal irregularities present in the proximal  femur and  acetabula.

Nonlethal metatropic dysplasia (MD)
The course of the disease is unique in that it evolves from individuals being short-limbed at birth to instead possessing a short-trunk phenotype over the first decade, as a result of rapidly progressing kyphoscoliosis. The main defects are found in the vertebral bodies and metaphyseal portions of the long bones. At birth, a prominent forehead and squared jaw are present. Occasionally, an individual may be born with an elongated coccyx, sometimes referred to as a tail-like appendage.

Case study
A case study done on a father and son with congenital distal spinal muscular atrophy with autosomal dominant inheritance provides further information on the disease. In this family, the mother and sisters of the young boy did not have the disorder but the father had been born with abnormal feet and had had muscle wasting below his knees. The father appeared to have more involvement in his legs than that of his son. This case is possibly the first well documented of the distal spinal muscular atrophy with involvement in both legs and arms and suggests distal SMA can be a slowly progressing disorder since the father still had involvement in his arms at an older age. This case study also suggested that SMA with autosomal dominant inheritance is much less common in children than SMA with autosomal recessive inheritance however; there was no significant difference in severity seen between the two types of inheritance.