The diseases of women : a handbook for students and practitioners . oid. On the other hand, ova-rian dermoids have been mistaken for the products of whatused to be vaguely called extra-uterine gestation. Ovarian dermoids have also been regarded as a kind ofimperfect pregnancy. It is, however, open to any one pos-sessing average patience, ordinary capacity for observation,and the usual training in histology to demonstrate to hisown satisfaction that the epithelium of the ovarian follicleis the source of all the structures found in ovarian dermoids, DISEASES OF THE OVARIES. 269 and that such cur
The diseases of women : a handbook for students and practitioners . oid. On the other hand, ova-rian dermoids have been mistaken for the products of whatused to be vaguely called extra-uterine gestation. Ovarian dermoids have also been regarded as a kind ofimperfect pregnancy. It is, however, open to any one pos-sessing average patience, ordinary capacity for observation,and the usual training in histology to demonstrate to hisown satisfaction that the epithelium of the ovarian follicleis the source of all the structures found in ovarian dermoids, DISEASES OF THE OVARIES. 269 and that such curious expressions as parthenogenesis, im-perfect conceptions, lucina sine concubitu, excess of forma-tive energy, etc., which have encompassed this questionwith such clouds of mystery, must yield to deductionsfrom accurately observed facts. 8. Papillomatous Cysts.—These differ from simplecysts of the ovary in the fact that they are invariably uni-locular and their inner walls are beset with warts (papil-lomata, Fig. 91). They also differ from the three preceding. Fig. 91.—Papillomatous cyst. species in the fact that there is reason to believe that theyarise in the paroophoron. These cysts do not affect the shape of the ovary untilthey have attained an important size: they always burrowbetween the layers of the mesosalpinx, and, when large,make their way between the layers of the mesometrium bythe side of the uterus. Papillomatous cysts are most fre-quent between the twenty-fifth and fiftieth years. Thewarts vary greatly in number: some cysts contain but 270 DISEASES OF WOMEN. few; in others they are so luxuriant as to cause the cyst toburst; the warts then protrude as soft dendritic vascularmasses, and the surface cells become detached and engraftthemselves on the peritoneum and form secondary accident is usually followed by hydroperitoneum. 9. Parovarian Cysts.—These are of two kinds: themost frequent are small pedunculated cysts arising inKobelts tubes; they a
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