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Men with
early-stage prostate cancer who are treated with therapies
designed to block production of the male hormone (androgen)
often find that "osteoporosis is an important and debilitating
side effect," according to University of California,
San Francisco researchers.
"There
is evidence of decreased bone mineral density with all types
of androgen deprivation therapy, presumably due to its anti-testosterone
effect," they reported in the Journal of Urology.
"Bone
mineral density loss is 3 percent to 5 percent yearly in the
first few years of androgen deprivation therapy with an increase
in osteoporotic fracture incidence," the researchers
found in their review of pertinent studies.
"Until
more data are available, it is prudent for all men beginning
androgen deprivation therapy to receive calcium and vitamin
D, and maintain a moderate exercise regimen," the researchers
concluded.
They said
more research was needed to evaluate these and other preventive
approaches including the effect of bisphosphonates, calcitonin,
selective estrogen re-uptake inhibitors, estrogens and intermittent
androgen deprivation therapy.
Source:
Prostate Cancer
Week of May 5, 2002
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