. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 87b. Fig. 87c. Figs. 87b and 87c.—Sections through the vesicle and chorion. X 25times. The deeper portion of the invagination in Fig. 87b is showncut in cross-section in Fig. 87c. Blood islands may be seen in themesoderm. 12 i8o MALL. [Vol. XIX. No. 93. Solid mass, 40 x 20 mm. Dr. Cassidy, Baltimore. The specimen was sent to the laboratory fresh and washardened in formalin. Upon opening it, it was found thatwithin there is a cavity into which projected a la
. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 87b. Fig. 87c. Figs. 87b and 87c.—Sections through the vesicle and chorion. X 25times. The deeper portion of the invagination in Fig. 87b is showncut in cross-section in Fig. 87c. Blood islands may be seen in themesoderm. 12 i8o MALL. [Vol. XIX. No. 93. Solid mass, 40 x 20 mm. Dr. Cassidy, Baltimore. The specimen was sent to the laboratory fresh and washardened in formalin. Upon opening it, it was found thatwithin there is a cavity into which projected a large tongue offleshy tissue. Within this tongue there is a clot of blood aswell as a sharply defined cavity. Sections, through different portions of the specimen,showed that the outer sac is the decidua and that the tongueof tissue is the chorion. Within the central cavity of thetongue (ccelom) lies the amnion. I cannot state definitelywhether or not the remnants of an embryo were present, forthe specimen was not cut into serial sections. The walls ofthe chorion are thickened and irregular, and around it arepacked hypertrophie
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