Gynecological diagnosis . nd itmay be so dilatable that it stretches to accommodate the penis with-out tearing. The rule is that it is generally torn by intercourse, andalways by parturition. Cysts and solid tumors of the hymen havebeen described, but they are excessively rare. Imperforate Hymen.—The opening in the hymen may be ex-tremely minute and yet pregnancy may ensue. A case has beenrecorded by H. L. Horton (Boston Med. and Surg. Jour., vol. 82,p. 33) of a patient who was in labor with a hymeneal openingmeasuring only one-sixteenth of an inch in diameter. From themost recent researches t
Gynecological diagnosis . nd itmay be so dilatable that it stretches to accommodate the penis with-out tearing. The rule is that it is generally torn by intercourse, andalways by parturition. Cysts and solid tumors of the hymen havebeen described, but they are excessively rare. Imperforate Hymen.—The opening in the hymen may be ex-tremely minute and yet pregnancy may ensue. A case has beenrecorded by H. L. Horton (Boston Med. and Surg. Jour., vol. 82,p. 33) of a patient who was in labor with a hymeneal openingmeasuring only one-sixteenth of an inch in diameter. From themost recent researches the view has gained ground that imper-forate hymen is a misnomer, the condition being one really ofatresia of the vagina, for in many of the cases recorded after theliberation of retained menses a hymen has been found outside theobstructing membrane. In other words, the lower end of the va-gina, which is a solid structure in the early stages of developmentafter the fusion of Miillers ducts and before the canal is formed,. 397 398 DISEASES OF THE VULVA
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