title: Yolk sac calcification: a sonographic finding associated with intrauterine embryonic demise in the first trimester.
abstract: Two cases of the sonographic demonstration of yolk sac calcification associated with first-trimester intrauterine embryonic demise are reported. Histologic verification was obtained in one case. Yolk sac calcification may reflect typical dystrophic changes or be more specifically related to a yolk sac calcium-binding protein. Awareness of this sonographic finding--which the authors believe to be previously undescribed--may prevent diagnostic errors.
authors.affiliation: Department of Radiology, Harborview Medical Center, Seattle.
authors.forename: R D
authors.initials: RD
authors.lastname: Harris
authors.forename: L M
authors.initials: LM
authors.lastname: Vincent
authors.forename: F B
authors.initials: FB
authors.lastname: Askin
mesh_terms: D000293:Adolescent; D000328:Adult; D002114:Calcinosis / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D005313:Fetal Death / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis* / Q000473:pathology; D014463:Ultrasonography; D015017:Yolk Sac / Q000473:pathology*