Insulin-like growth factor (IGF-1) is produced by the liver in response to human growth hormone. Many of growth hormone's effects may be the result of IGF-1. Human growth hormone is described in the article on serostim on page 3. A trial comparing growth hormone and IGF-1 for the treatment of children and adolescents with HIV infection is being conducted at the National Cancer Institute. To participate in this trial, you must be 6 to 18 years old with a failure to grow or less than normal weight or height. Participants will be divided into two groups. One group will be given IGF-1 twice a day. The second group will be given human growth hormone once a day. Both treatments are given by shot. Participants being given IGF-1 will have to be in the hospital for five days. Total time on study is 6 months.

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