As the outcome of extensive investigations concerning these interesting and important growths, especially by Wilms, it has been shown that teratomas in general and more particularly those of the ovaries and testicle are more or less complicated structures and consist of tissues and rudiments of organs derived from all of the three germinal layers. The arrangement of the tissues and organs is sometimes not unlike that in the fetus. The prominences and protuberances seen upon the cut surface of the cysts contain the various elements referred to, and it is by careful examination by means of serial sections that their complicated structure has been made clear. Not all the tissues of the human body have been demonstrated in these tumors, but careful search is increasing the number of structures found. Thus Katsurada2 adds to the already large list cardiac muscle. External skin and its appendages; entodermal tubules and cavities
DERMOID CYSTS OR EMBRYOMAS OF THE OVARY.. JAMA. 1901;XXXVII(18):1184–1185. doi:10.1001/jama.1901.02470440034003
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