. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 123d.—Section through the and blood islands are shown. X 25 times. Entoderm, meso- i88 MALL. [Vol. XIX. No. 124. Ovum, 90 x 75 x 50 mm.; embryo, C. R., 35 mm. Abor-tion 18 weeks after the beginning of the last menstrual period. Dr. Cassidy, Baltimore. The ovum was brought to the laboratory fresh and thenhardened in a strong solution of formalin. It appears as atransparent cyst with a crescent-shaped placenta on one end,measuring 60 x 50 mm. Upo
. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 123d.—Section through the and blood islands are shown. X 25 times. Entoderm, meso- i88 MALL. [Vol. XIX. No. 124. Ovum, 90 x 75 x 50 mm.; embryo, C. R., 35 mm. Abor-tion 18 weeks after the beginning of the last menstrual period. Dr. Cassidy, Baltimore. The ovum was brought to the laboratory fresh and thenhardened in a strong solution of formalin. It appears as atransparent cyst with a crescent-shaped placenta on one end,measuring 60 x 50 mm. Upon opening it I found within asecond sac measuring 50 x 37 x 35 mm., which had tough. Fig. 124a.—Whole ovum with placenta attached to one side ofReduced one-half. it. fibrous walls and proved to be the amnion. Within this wasthe embryo, with club hands and feet, pointed ears and a verythin, twisted, umbilical cord. Sections of the placenta show that the villi are mattedtogether and are covered with a thick layer of decidua entire thickness of villi is infiltrated with leucocytes,which at points are accumulated sufficiently to form small
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