The practice of surgery . )ontlageswhich are developed from the epiblast. .\ sim])le form of dermoid isa cyst whose interior is lined with skin bearing hair and sebaceousglands. The cavity of such a cyst is usually filled with a mixed thicklifjuid made up of fat, water, cholesterin, and growing hairs. A commonlocation of dermoids is in the median line and in the region of theembryonic fissures. We see dermoids of the back associated withspina bifida and dermoids over the sternum. There are dermoids ofthe scalp, which are frequently called wens, and dermoids of the dura. ^ff^ Fig. 515.—Solid de
The practice of surgery . )ontlageswhich are developed from the epiblast. .\ sim])le form of dermoid isa cyst whose interior is lined with skin bearing hair and sebaceousglands. The cavity of such a cyst is usually filled with a mixed thicklifjuid made up of fat, water, cholesterin, and growing hairs. A commonlocation of dermoids is in the median line and in the region of theembryonic fissures. We see dermoids of the back associated withspina bifida and dermoids over the sternum. There are dermoids ofthe scalp, which are frequently called wens, and dermoids of the dura. ^ff^ Fig. 515.—Solid dermoid tumor escuiiiiig from the pelvis (Park). mater even. Dermoid cysts are found most commonly in the ovaryand may there attain a large size. Sometimes these forms of tumor may degenerate into sarcomata,or may even develop as cancers. In their ordinary form, and when non-malignant, dermoid cystscause such symptoms as we should expect from an} other benign tumor,encroaching upon organs and interfering with their functions. The treatment is radical extirpation, and the extirpation must bethorough indeed, for if any of the epithelial lining of the cyst be left,a new tumor of similar type is likely to form. Teratomata are structures far more complicated than are may contain mere fragments of embryonic tissue, or they maycontain portions of jaws, teeth, limbs, and even the trunk of a partially^ Dermoid, from derma, skin; teratoma, from icrata, monstrosity. DERMOIDS AND TERATOMATA 825 formed embryo. The so-called double monsters, museum curiosi-ties,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsurgery, bookyear1910
