. Gynecology : . ving been seen in one ovary and twenty-one in both ovaries (vonFranque). They are practically always monolocular, and ordinarily do notgrow much larger than a mans fist, though occasionally they develop into verj^large tumors. The cysts always contain sebaceous material, which is fluid at the bodytemperature, but thick and doughy when cooled. In one or more parts of the 26 402 GYNECOLOGY wall can be found thickened areas, the so-called dermoid plugs, which, onmicroscopic examination, exhibit the various structures of the skin and these epidermal areas stream masses
. Gynecology : . ving been seen in one ovary and twenty-one in both ovaries (vonFranque). They are practically always monolocular, and ordinarily do notgrow much larger than a mans fist, though occasionally they develop into verj^large tumors. The cysts always contain sebaceous material, which is fluid at the bodytemperature, but thick and doughy when cooled. In one or more parts of the 26 402 GYNECOLOGY wall can be found thickened areas, the so-called dermoid plugs, which, onmicroscopic examination, exhibit the various structures of the skin and these epidermal areas stream masses of hair which may or may not beof the same color as that of the patient who harbors the tumor. Hair is presentin nearly all of the tumors. Next to hair, irregularly formed bony structures aremost commonly encountered. Section of the dermoid plug often shows rudi-mentary and ill-assorted but easily recognizable tissues from entoderm, ecto-derm, and mesoderm, such as nerve-ganglia, nerve-fibers, glandular elements. Fig. 152.—Serous Cystadenoma of the power. This section is taken from the surface of an ovary which contained a serous cyst-adenoma and shows the activity of the epithelium covering the ovary. The cells are becomingcylindric in shape, the nuclei are larger and stain stronger. At one point the beginning of a papillais seen, the stroma is growing out, pushing the epithelium with it. The stroma is edematous andcontains many dilated blood-vessels. from the respiratory and alimentary tracts, breast tissue, etc., in addition tothe hair and bone above mentioned. The stage of development of the varioustissues corresponds roughly to the age of the patient. The most completelyformed structures are usually of ectodermal origin, from the cranial parts,such as hair, parts of the jaw, teeth, .parts of the skull and brain, the eyes, theglottis, and trachea. A crudely rudimentary fetus may be seen. No sign offetal membranes has ever been observed. The part of the inner cy
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