This review of the literature indicates that weight gain is a common o
bservation among women after the diagnosis of breast cancer. Gains in
weight range from 0 to 50 lb and are influenced by menopausal status;
nodal status; and the type, duration, and intensity of treatment. Weig
ht gain appears to be greater among premenopausal women; among those w
ho are node positive; and among those receiving higher dose, longer du
ration, and multiagent regimens. Psychosocial research suggests that w
eight gain has a profoundly negative impact on quality of life in pati
ents with breast cancer. Recent findings also suggest that weight gain
during therapy may increase the risk of recurrence and decrease survi
val. Although weight gain in patients with breast cancer is clinically
well appreciated, little research has been conducted to investigate t
he underlying mechanisms of energy imbalance. Changes in rates of meta
bolism, physical activity, and dietary intake are all plausible mechan
isms and call for more research. Further study will provide valuable i
nsight into the problem of weight gain and encourage effective interve
ntions to improve the quality and quantity of life for the woman with
breast cancer. Until more is known, however, dietetics practitioners w
ill have to monitor and work individually with patients with breast ca
ncer and use empirical approaches to achieve the important goal of wei
ght management.