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Abstract:
The concept of cerebellar atrophy was first introduced by Pierre Marie in 1893 in his description of hereditary cerebellar ataxia. Subsequent criticism of this notion was refuted by the report of new clinicopathological entities which are compatible with it. The contributions of the Clinic for Diseases of the Nervous System are discussed in this paper. Etiological classification is difficult, in spite of progress made in the genetic, epidemiologic, and biochemical approaches to cerebellar atrophies. Pathologic findings appear to supply the most secure basis for presentation of these affections. Predominantly cortical atrophies may be localized to the vermis. This is the case in the familial cerebello-olivary atrophy of Holmes (1907), in tardive cortical atrophy (Pierre Marie, Foix and Alajouanine, 1922), and in the cerebellar atrophy of alcoholics (Alajouanine, Castaigne, Contamin and Lebourges, 1959; Victor, Adams and Mancall, 1959), in which the lesions are similar. The frequent intrication of the various etiological factors: age, deficiencies, alcohol, heredity, suggests the role of a sometimes primary, sometimes latent genetic predisposition, revealed during various pathological conditions. Cortical cerebellar atrophy may be of the diffuse type, as in paraneoplastic cerebellar atrophy (Brouwer and Biemond, 1938), which is closely related to subacute polioencephalomyelitis in cancer patients (Dubas et al., 1982), and in congenital atrophy of the granular layer (Norman, 1940), which is more a dysgenesis than a true degenerative affection. Lesions affecting mainly the efferent or afferent cerebellar pathways include olivopontocerebellar atrophy (Dejerine and André Thomas, 1900) which should be included in the larger overall concept of multiple system atrophy (Oppenheimer, 1976), and dentorubric atrophy (Ramsay Hunt, 1921) which themselves should be integrated in the group of spinocerebellar atrophies. Finally, olivorubrocerebellar atrophy (Lejonne and Lhermitte, 1909) and crossed cerebellar atrophy, traditionally studied together with cerebellar atrophies, are only the result of a pre-existing lesion.
Insights
Cerebellar atrophy, first described in 1893, presents diagnostic challenges due to complex causes. Pathological findings are key to classifying these diverse neurological conditions.
Area of Science:
- Neurology
- Neuroscience
- Pathology
Context:
- The concept of cerebellar atrophy was introduced in 1893, with subsequent clinicopathological entities supporting its existence.
- Etiological classification of cerebellar atrophies remains challenging despite advances in genetic, epidemiologic, and biochemical research.
- Pathologic findings provide the most reliable basis for categorizing cerebellar atrophy affections.
Purpose:
- To review the historical concept and clinicopathological entities of cerebellar atrophy.
- To discuss the difficulties in etiological classification and the importance of pathological findings.
- To explore various types of cerebellar atrophy, including cortical and pathway-affecting lesions.
Summary:
- Predominantly cortical atrophies can be localized (e.g., familial cerebello-olivary atrophy, alcoholic cerebellar atrophy) or diffuse (e.g., paraneoplastic cerebellar atrophy).
- Lesions affecting cerebellar pathways include olivopontocerebellar atrophy and dentorubric atrophy, often integrated into broader classifications like multiple system atrophy and spinocerebellar atrophies.
- The interplay of factors like age, deficiencies, alcohol, and heredity suggests a role for genetic predisposition in cerebellar atrophies.
Impact:
- Highlights the complexity of classifying cerebellar atrophies, emphasizing the diagnostic value of pathological examination.
- Provides a framework for understanding diverse cerebellar atrophy subtypes based on lesion location and etiology.
- Underscores the potential role of genetic predisposition interacting with environmental factors in the development of cerebellar degeneration.