Images in Clinical Medicine
Yolk Sac with Blood Island
N Engl J Med 1999; 340:617February 25, 1999
- Article
Figure 1 A 31-year-old woman who had had amenorrhea for 53 days was found to have a left tubal pregnancy. Ultrasonography (Panel A) demonstrated a gestational sac (GS) containing an embryo (E) and a yolk sac (YS). A cross section of the fallopian tube (Panel B; hematoxylin and eosin, ×9.1) reveals a chorionic cavity (CC) containing the yolk sac. The area outlined in Panel B is shown magnified in Panel C (hematoxylin and eosin, ×280), revealing the wall of the yolk sac and placenta (P) with an intervillous space (IS). The inset (hematoxylin and eosin, ×1500) shows maternal erythrocytes present in the intervillous space. The area outlined in Panel C is shown magnified in Panel D (hematoxylin and eosin, ×1400); the higher magnification reveals the yolk-sac entoderm (YSE), angioblastic tissue space (ATS), and a blood island (BI). There is a sharp contrast between the nucleated fetal cells in the blood island in Panel D and the maternal erythrocytes in the inset in Panel C.
Isao Katayama, M.D.
Hidekazu Kayano, M.D.
Saitama Medical School, Saitama 350-04, Japan- Citing Articles (1)
Citing Articles
1
Arnold M. Epstein, Joel S. Weissman, Eric C. Schneider, Constantine Gatsonis, Lucian L. Leape, Robert N. Piana. (2003) Race and Gender Disparities in Rates of Cardiac Revascularization. Medical Care 41:11, 1240-1255
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