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In page Copper in biology:

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With early diagnosis and treatment consisting of daily injections of copper histidine intraperitoneally and intrathecally to the central nervous system, some of the severe neurological problems may be avoided and survival prolonged. However, Menkes disease patients retain abnormal bone and connective-tissue disorders and show mild to severe intellectual disability.[4] Even with early diagnosis and treatment, Menkes disease is usually fatal.[citation needed]