A diagnosis of Niemann-Pick disease is confirmed by analyzing a
sample of tissue.
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At least five different forms of Niemann-Pick disease (NPD) have
been identified.
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Some adults with Niemann-Pick disease (Type E) may also show a
loss of muscle coordination.
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Ultimately, the nervous system becomes severely damaged and
patients with Types C and D Niemann-Pick disease die.
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Both Niemann-Pick disease types A and B occur in many ethnic
groups; however, they occur more frequently among individuals of
Ashkenazi Jewish descent than in the general population.