Because adolescents are codified as incompetents, their health care de
cision-making authority often is encroached upon. When a teenager deve
lops a serious disease such as cancer, others are even more likely to
appropriate decision-making authority than under normal circumstances.
Adolescents can contribute to decisions concerning their treatment pr
ovided certain guidelines are used. These guidelines stem from bioethi
cal concerns and our understanding of the development in cognitive abi
lity related to decision-making. This article summarizes consideration
s relating to each of these two areas. Because the clinical stage of t
he malignancy also affects bioethical concerns, the adolescent's role
in decision-making at the time of initial diagnosis and recurrence are
discussed.