. Cyclopædia of obstetrics and gynecology. ted by a process of proliferation, and have a flask or pear-shape. They appear a little larger and a little more perfectly formed innewly born children, and are of the same size in both sexes. At the timeof their first formation in the ftetus, there is a slight excavation at thesite of the nipple; but the nipples and the excretory ducts of the glandare developed during fcjetul life. Newly-born children have indeed toler-ably well-developed nipples. Th. Kolliker describes certain processesin the gland, which have been hitherto thought to be exceptional
. Cyclopædia of obstetrics and gynecology. ted by a process of proliferation, and have a flask or pear-shape. They appear a little larger and a little more perfectly formed innewly born children, and are of the same size in both sexes. At the timeof their first formation in the ftetus, there is a slight excavation at thesite of the nipple; but the nipples and the excretory ducts of the glandare developed during fcjetul life. Newly-born children have indeed toler-ably well-developed nipples. Th. Kolliker describes certain processesin the gland, which have been hitherto thought to be exceptional, as regu-lar and normal. He says, of the mammary glands of newly-born children: The most striking appearance to be seen in all glands, though to a lessextent in boys, is the ectasia or dilatation of a now large, now small num-ber of gland-ducts, so that they present a considerable lumeii from theirexternal opening to the terminal bulb. In these ducts, the lumen is filledwith thrown-olf epithelium and a white granular mass, while the pre-. FiG. 1.—Mammary Gland OF Female Embryo. 7 inches long; enlarged 70 times. (Langer.) served epithelium is disposed in layers on the basement on he says: The above described ectasia of the milk-ducts beginsin the first week of life, and frequently goes on to pronounced paren-chymatous swelling, which may present the appearance of mastitis withgreat dilatation of the ducts, so that the whole gland has the appearanceof a cavernous organ. In such cases, one never finds simple cylindricalepithelium, but the ducts either contain few epithelia, which seem to bepressed flat against the parietes of the cavernous space, or we find, whatis more frequently the case, stratified epithelium with two or three layersof round cells. The greatly dilated ducts and lobules contain sometimessingle epithelial cells, sometimes a granular, yellowish, crumbling mass,consisting of large plates, (changed epithelial cells?) and not taking 4 DISEASES OF
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