biology

Mowat–Wilson syndrome

Mowat–Wilson syndrome is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Mowat–Wilson syndrome rather than just read about it. In short: Mowat–Wilson syndrome is a rare genetic disorder that was clinically delineated by David R. Mowat and Meredith J.

Key takeaways

Mowat–Wilson syndrome belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Mowat–Wilson syndrome to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mowat–Wilson syndrome from memory before moving on to harder problems.

Reference excerpt

Mowat–Wilson syndrome is a rare genetic disorder that was clinically delineated by David R. Mowat and Meredith J. Wilson in 1998. The condition affects both males and females, has been described in various countries and ethnic groups around the world, and occurs in approximately 1 in 50,000–100,000 births.

Presentation This autosomal dominant disorder is characterized by a number of health defects including Hirschsprung disease, intellectual disability, epilepsy, delayed growth and motor development, congenital heart disease, genitourinary anomalies and agenesis of the corpus callosum. However, Hirschsprung's disease is not present in all infants with Mowat–Wilson syndrome and therefore it is not a required diagnostic criterion. Distinctive physical features include microcephaly, narrow chin, cupped ears with uplifted lobes with central depression, deep and widely set eyes, open mouth, wide nasal bridge and a shortened philtrum. People with this condition have severe intellectual disability in almost all cases; however, a small minority have moderate intellectual disability. Speech is typically limited or absent. Many of those with Mowat–Wilson syndrome also have a distinctive open mouthed, smiling expression and friendly personalities.

Causes The disorder is expressed in an autosomal dominant fashion and may result from a de novo loss of function mutation or total deletion of the ZEB2 gene located on chromosome 2q22.

Diagnosis Mowat–Wilson syndrome (MWS) can be diagnosed clinically on the basis of moderate to severe intellectual disability in the presence of characteristic facial features (widely spaced eyes, broad eyebrows with a medial flare, low-hanging columella, prominent or pointed chin, open-mouth expression, and uplifted earlobes with a central depression — coined as orecchiette ears given their resemblance to the pasta). Other clinical features can include congenital heart defects, Hirschsprung disease or chronic constipation, genitourinary anomalies (particularly hypospadias in males), and hypogenesis or agenesis of the corpus callosum. Speech is typically limited to a few words or is absent, with relative preservation of receptive language skills. Growth restriction with microcephaly and seizure disorder are also common. Most affected people have a happy demeanor and a wide-based gait that can sometimes be confused with Angelman syndrome. The diagnosis of MWS confirmed by demonstrating a pathogenic variant (mutation) in the ZEB2 gene by molecular genetic testing.

Treatment To date, there is no cure for MWS. Affected individuals should see a pediatrician or adult physician at least annually to monitor growth, development, seizures and general health and well-being. Developmental potential is maximized through the use of physiotherapy, occupational therapy and speech pathology. Medical subspecialist care may be required if other organs are involved (e.g., a cardiologist and/or cardiac surgeon for congenital heart disease, gastroenterologist and or surgeon for Hirschsprung's disease or constipation.

Prognosis There is no cure for this syndrome. Treatment is supportive and symptomatic. All children with Mowat–Wilson syndrome required early intervention with speech therapy, occupational therapy and physical therapy.

References

Further reading Cerruti Mainardi, P; Pastore, G; Zweier, C; Rauch, A (2004). "Mowat–Wilson syndrome and mutation in the zinc finger homeo box 1B gene: A well defined clinical entity". Journal of Medical Genetics. 41 (2): e16. doi:10.1136/jmg.2003.009548. PMC 1735678. PMID 14757866. Mowat, DR; Wilson, MJ; Goossens, M (2003). "Mowat–Wilson syndrome". Journal of Medical Genetics. 40 (5): 305–10. doi:10.1136/jmg.40.5.305. PMC 1735450. PMID 12746390.

External links

GeneReview of Mowat–Wilson syndrome

Illustrations

Worked examples

Example 1 — a first encounter with Mowat–Wilson syndrome

Start with the simplest possible case. Write down what Mowat–Wilson syndrome claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Mowat–Wilson syndrome before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Mowat–Wilson syndrome ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Mowat–Wilson syndrome

In research: Mowat–Wilson syndrome appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Mowat–Wilson syndrome in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Mowat–Wilson syndrome is common in secondary-school and first-year university syllabi. It links to neighbouring topics Rare genetic syndromes, Rare syndromes, Syndromes affecting the gastrointestinal tract, so understanding it makes those chapters shorter.
In everyday life: Look for Mowat–Wilson syndrome outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Mowat–Wilson syndrome” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Mowat–Wilson syndrome in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mowat–Wilson syndrome means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Mowat–Wilson syndrome out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mowat–Wilson syndrome in simple terms?

Mowat–Wilson syndrome is a rare genetic disorder that was clinically delineated by David R. Mowat and Meredith J.

Why does Mowat–Wilson syndrome matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Mowat–Wilson syndrome?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Mowat–Wilson syndrome.