White matter diseases: Myelination. Pattern recognition in metabolic diseases/leukodystrophies

Pattern-based MRI distinguishes normal myelination, hypomyelination, and inherited metabolic white matter disease.

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Description

Myelin structure, normal chronology and MRI appearance of infant myelination, and terminology for abnormal white matter development establish the foundation. Symmetry, distribution, and specific patterns then guide assessment of leukodystrophies and metabolic disorders, including Alexander disease, metachromatic leukodystrophy, L-2-hydroxyglutaric aciduria, and selected hypomyelinating conditions.

Learning Objectives

Recognise the normal chronology and MRI appearance of myelination.
Distinguish delayed myelination, hypomyelination, and other pathological white matter patterns.
Apply symmetry and anatomical distribution to the differential diagnosis of leukodystrophies and metabolic disease.
Recognise characteristic patterns of selected leukodystrophies and hypomyelinating disorders.

Topics Covered

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00:15 - Introduction and Overview of Presentation Topics

00:38 - Understanding White Matter and Myelination

01:29 - The Structure and Function of Myelin

05:06 - Chronology of Myelination

09:01 - MRI Changes Due to Myelination in Infants

10:02 - Importance of Assessing Myelination in Diagnosing Diseases

12:21 - Pathological Conditions and Definitions Related to Myelination

14:57 - Importance of Accurate Imaging for Leukodystrophies Diagnosis

18:33 - Characteristics of Symmetrical White Matter Disorders

21:54 - Differential Diagnostic Algorithm for White Matter Diseases

25:48 - Identifying Different Types of Leukodystrophies

29:27 - Alexander Disease - Features and Diagnosis

31:31 - Diagnosing Metachromatic Leukodystrophy

37:09 - Subcortical Involvement in L2 Hydroxyglutaric Aciduria

42:41 - Identifying Mucopolysaccharidosis

44:43 - Cocaine Disease - Hypomyelination Characteristics

46:40 - Distinguishing Periaxin-related Hypomyelination

47:53 - Importance of Symmetry in White Matter Disorders

54:39 - Conclusion and Summary of Key Points

Lecturers

Peter Barsi^{M.D. Ph.D.}

Budapest, Hungary

Consultant radiologist at TMC Honorary Professor of Neuroradiology at the Semmelweis University

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