Inclusion Criteria

Children with cancer (or a precancer syndrome) or HIV infection, between the age(s) of 3
months to 30 years, who are evaluated by the Pediatric Branch and are found to be not
immediately eligible for an ongoing protocol but are likely to become a candidate for a
future protocol.

Children with cancer (or a precancer syndrome) or HIV infection, who present with disease
manifestations of special interest to Pediatric Branch investigators, because they are
likely to shed light on disease.

Patients who, when evaluated by the Branch, are determined to likely never become eligible
for a Pediatric Branch protocol are not eligible for this protocol.

No patients younger than 3 months of age or older than 30 years of age are eligible for
this protocol.