Parents and legal guardians have authority to consent to medical treat
ment on behalf of miners. Recently, the concept of emerging competence
has been popularized, whereby a child may achieve sufficient understa
nding and maturity to enable him/her to make a wise choice in his/her
own interests. Although there are undoubted merits in involving childr
en in their medical treatment, the ultimate legal authority for consen
t rests with parents and guardians acting on the advice of doctors and
in the child's best interests. We describe two cases in which childre
n withdrew their consent to elective surgery, despite the help and enc
ouragement of their parents and doctors. Surgery was cancelled rather
than use force to induce anaesthesia. In practice, it seems that a chi
ld must demonstrate a greater maturity and understanding to refuse med
ical treatment than to agree to it. Some advice is given to clinicians
facing similar situations.