The correct assessment of a cancer patient is a key step in the treatment p
rocess. In older people, this assessment entails not only the patient's bas
ic medical history and the standard cancer staging, but also much more comp
rehensive evaluation of the various facets of the patient's health and envi
ronment that may interfere with his or her therapy. Patient fitness for ele
ctive surgery, radiation therapy, and chemotherapy must be considered. Geri
atricians have defined the relevant aspects of the general evaluation of th
e older person, and now this work is being adapted to cancer patients. This
article reviews the various aspects of a comprehensive assessment applicab
le to the cancer patient in settings such as academic oncology programs, co
operative group studies, and private oncology practice.