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  • Title: [Lysosomal disorders. Diagnostic role of extra-cerebral biopsy].
    Author: Delisle MB, Uro-Coste E, Salvayre R, Levade T.
    Journal: Ann Pathol; 2000 Oct; 20(5):527-32. PubMed ID: 11084420.
    Abstract:
    Lysosomal disorders are related to dysfunctions of lysosomes which may affect enzymes, transporters or activators. Their clinical features are varied. This is due to several mechanisms, the metabolism of nervous tissue explaining its particular involvement in sphingolipidosis. The classifications are still changing and, recently, some ceroid-lipofuscinosis were included in this group. Biological diagnosis relies on biochemical study of accumulated substrate or on enzymatic assays. It remains sometimes difficult. The analysis of tissue is then a useful tool. Biopsies from extraneural tissues, essentially skin and conjunctival biopsies, are nowadays preferred to brain biopsies. However, the location of the biopsy varies according to the suspected disease. The specimen must be adequately prepared and electron microscopy is necessary. Results of this examination are summarized. The interest of the biopsy is not restricted to diagnosis, it is useful in follow-up of treated patients and for understanding the underlying pathophysiology.
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