title: Pelvic "doughnut". Sign of incidental pregnancy on bone scintigraphy.
abstract: The "doughnut" sign as a scintigraphic pattern compatible with a gravid uterus was observed on the multiphase bone scan. Awareness of this scintigraphic finding should alert the nuclear physician to the possibility of incidental pregnancy.
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D010384:Pelvic Bones / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011253:Pregnancy in Adolescence; D011877:Radionuclide Imaging; D013669:Technetium Tc 99m Medronate; D014599:Uterus / Q000000981:diagnostic imaging
chemical_list: D013669:Technetium Tc 99m Medronate