Two patients with the clinical picture of a late infantile and juvenile amaurotic familial idiocy (Batten's disease) have been examined electron microscopically. The typical cytoplasmic inclusion bodies in the Schwann cells of the sural nerve supported this clinical diagnosis. The importance of sural nerve biopsy in patients with a cerebroretinal degeneration is discussed.
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Bolmers et al. (1973) studied this question.
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