Uterine blush in multiphase bone imaging.

Uterine visualization was found as a transient finding in the early phases of the biphasic and triphasic bone scans in 29 of 29 postmenarchial adolescent and young adult females studied regardless of phase of the menstrual cycle. This observation differs from reports of uterine uptake in Meckel's scanning where visualization occurred only in the menstrual or secretory phases of the cycle. None of 12 control patients (six males and six premenarchial females) showed intrapelvic activity on the blood-pool images. The accumulation of radiotracer in the uterus should be expected as a normal transient physiologic phenomenon in young women after menarche.