Development of Some Organs Derived from the Three Embryonic Germ Layer in a Degus Ectopic Pregnancy and Presence of a Cytotrophoblast That Mimics Human Chorionic Placenta
Figure 1
Macro- and microscopic views of the degu’s intraperitoneal masses. (a) External aspect of the bigger (BM) and the smaller (SM) masses. They were enveloped by a thin translucent membrane and were profusely irrigated. The arrows depict the zone of the chorionic villus (CV) (see also Figure 5) and the zone of the apparent umbilical cord (UC) (see also Figure 3(d)). A remnant of the small intestine (SI) near the bigger mass is also observed. (b) Smaller mass showing the thin process (white arrow heads) that connects to the bigger mass. (c) Photomicrograph showing the kidney-like tissue formation towards the peripheral surface of the bigger mass. (d) Higher magnification of a selected region from (c) showing three glomerulus, one of them depicting a clear vascular pole (arrow). (c and d) Trichromic Masson staining. Calibration bars (a) = 1.5 cm; (b) = 3.2 cm; (c) = 198 μm; (d) = 52 μm.
