A pelvic hypervascular brush often creates a diagnostic dilemma during
radionuclide abdominal imaging studies in females. This blush is show
n to be due to uterine vascularity that is more prominent in the secre
tory and menstrual phases of the menstrual cycle. Significant uterine
vascularity in the earlier phases is inappropriate and may be patholog
ic. Three such cases are presented in which increased uterine vascular
ity on radionuclide imaging during the proliferative phase either lead
to a diagnosis or supported a clinical finding.