BACKGROUND. Despite numerous studies of partial mastectomy and psychol
ogic morbidity in the first 24 months following surgery, little is kno
wn about the long term psychosocial repercussions of partial and total
mastectomy. METHODS. The effect of the type of mastectomy on psycholo
gic adjustment was assessed among 124 breast carcinoma survivors, 47 o
f whom underwent partial mastectomy and 77 of whom underwent total mas
tectomy, 8 years after initial treatment. Interviews were also conduct
ed 3 and 18 months after surgery. Psychologic distress was assessed us
ing the Psychiatric Symptom Index. Other outcomes included physical sy
mptoms, patients' perceptions of their own health, satisfaction with t
he type of surgery performed and with the appearance of the scar, and
marital and sexual adjustments. RESULTS. No statistically significant
differences between partial and total mastectomy were observed with re
spect to long term quality of life. Age at diagnosis modified the rela
tion between the type of mastectomy and psychologic distress in both t
he short term and the long term (P = 0.04). Among women younger than 5
0 years, partial mastectomy appeared to be protective against distress
when compared with total mastectomy. In contrast, among women age 50
years or older, partial mastectomy was associated with higher psycholo
gic distress levels at all interviews. CONCLUSIONS. Assessed globally,
partial and total mastectomy appear to be equiv alent treatments in t
erms of patients' long term quality of life. However, both short term
and long term distress levels after partial and total mastectomy may d
epend on patients' age at diagnosis. The findings of this study sugges
t that the increased use of partial mastectomy may lessen the negative
effects of breast carcinoma on younger survivors' quality of life. Ne
vertheless, total mastectomy may bean appropriate initial treatment fo
r some women who truly choose it. Cancer 1998;83: 2130-8. (C) 1998 Ame
rican Cancer Society.