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Leukoaraiosis

Leukoaraiosis is a science 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 Leukoaraiosis rather than just read about it. In short: Leukoaraiosis is a particular abnormal change in appearance of white matter near the lateral ventricles. It is often seen in aged individuals, but sometimes in young adults.

Leukoaraiosis — main illustration
Leukoaraiosis — illustration

Key takeaways

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

Reference excerpt

Leukoaraiosis is a particular abnormal change in appearance of white matter near the lateral ventricles. It is often seen in aged individuals, but sometimes in young adults. On MRI, leukoaraiosis changes appear as white matter hyperintensities (WMHs) in T2 FLAIR images. On CT scans, leukoaraiosis appears as hypodense periventricular white-matter lesions.

Causes

White matter hyperintensities can be caused by a variety of factors, including ischemia, micro-hemorrhages, gliosis, damage to small blood vessel walls, breaches of the barrier between the cerebrospinal fluid and the brain, or loss and deformation of the myelin sheath. Multiple small vessel infarcts in the subcortical white matter can cause the condition, often the result of chronic hypertension leading to lipohyalinosis of the small vessels. Patients may develop cognitive impairment and dementia. Many patients can have leukoaraiosis without any associated clinical abnormality. However, underlying vascular mechanisms are suspected to be the cause of the imaging findings. Hypertension, smoking, diabetes, hyperhomocysteinemia, and heart diseases are all risk factors for leukoaraiosis. Leukoaraiosis has been reported to be an initial stage of Binswanger's disease but this evolution does not always happen.

Special cases Ischaemic leukoaraiosis has been defined as the leukoaraiosis present after a stroke. Diabetes-associated leukoaraiosis has been reported CuRRL syndrome: increased Cup: Disc Ratio, Retinal GanglionCell Complex thinning, Radial Peripapillary Capillary Network Density Reduction and Leukoaraiosis CADASIL is a hereditary cerebrovascular disorder associated with T2-hyperintense white matter lesions that have a greater extent and earlier age of onset than age-related leukoaraiosis.

See also Hyperintensities Binswanger's disease Demyelinating disease

References

Further reading Pantoni, L.; Garcia, J. H. (1995). "The Significance of Cerebral White Matter Abnormalities 100 Years After Binswanger's Report: A Review". Stroke. 26 (7): 1293–301. doi:10.1161/01.STR.26.7.1293. PMID 7604429. Pantoni, L; Inzitari, D (1998). "New clinical relevance of leukoaraiosis. European Task Force on Age-Related White Matter-Changes" (PDF). Stroke. 29 (2): 543. doi:10.1161/01.str.29.2.543. PMID 9472903. Werder, SF (2010). "Cobalamin deficiency, hyperhomocysteinemia, and dementia". Neuropsychiatric Disease and Treatment. 6: 159–95. doi:10.2147/ndt.s6564. PMC 2874340. PMID 20505848.

Illustrations

Leukoaraiosis: Axial T2 FLAIR sequence MR image of a middle-aged man with leukoaraiosis.
Axial T2 FLAIR sequence MR image of a middle-aged man with leukoaraiosis.
Leukoaraiosis: MRI image: Leukoaraiosis in a 90-year-old patient with cerebral atrophy.
MRI image: Leukoaraiosis in a 90-year-old patient with cerebral atrophy.
Leukoaraiosis: Head CT showing periventricular white matter lesions.
Head CT showing periventricular white matter lesions.
Leukoaraiosis: The blue arrows indicate leucoaraiosis. In the left image these may well represent transependymal CSF diapedesis due to normal pressure hydrocephalus, which in turn is suggested by the narrowed superior CSF spaces and acute callosal angle. The unilateral occurrence of these alterations in right image suggests they are probably due to vascular encephalopathy.
The blue arrows indicate leucoaraiosis. In the left image these may well represent transependymal CSF diapedesis due to normal pressure hydrocephalus, which in turn is suggested by the narrowed superior CSF spaces and acute callosal angle. The unilateral occurrence of these alterations in right image suggests they are probably due to vascular encephalopathy.

Worked examples

Example 1 — a first encounter with Leukoaraiosis

Start with the simplest possible case. Write down what Leukoaraiosis claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Leukoaraiosis 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 Leukoaraiosis 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 Leukoaraiosis

In research
Leukoaraiosis appears in science 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 Leukoaraiosis 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
Leukoaraiosis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cerebrum, so understanding it makes those chapters shorter.
In everyday life
Look for Leukoaraiosis 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.
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How to study Leukoaraiosis in 20 minutes

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

Frequently asked questions

What is Leukoaraiosis in simple terms?

Leukoaraiosis is a particular abnormal change in appearance of white matter near the lateral ventricles. It is often seen in aged individuals, but sometimes in young adults.

Why does Leukoaraiosis matter?

Because it connects several science 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 Leukoaraiosis?

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 Leukoaraiosis.

Tags

  • Cerebrum

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