Identifier: referencehandboo02buck Title: A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science Year: 1913 (1910s) Authors: Buck, Albert H. (Albert Henry), 1842-1922 Stedman, Thomas Lathrop, 1853-1938 Subjects: Dictionaries, Medical Publisher: New York : W. Wood and Company Contributing Library: University of California Libraries Digitizing Sponsor: Internet Archive

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Text Appearing Before Image: phy represents the natural enlargement of themammary gland associated with certain changes in-cident to pubescence. LntU the period of pubertyis attained there is no perceptible difference in thestructure of the male and the female mUk-gland, butat this time further development in the male ceases,whereas in the female breast renewed evolutionarychanges begin and progress until the menstrual func-tion is fully established. After this period the mam-mary changes again remain in abeyance untilstimulated to renewed activity bj gestation, atwhich time marked hypertrophy takes place and 464 steadily goes on to the time of lactation, when thegland arrives at its highest state of organization. According to Dennis there is a true physiologicalmammary hypertrophy of gigantic proportions; but,if it ever exists, it is extremely rare, and histologicalexaminations have not substantiated this view. DiFFCSE Idiopathic Hypertrophy.—This form ispathological, and is practically always bilateral in the

Text Appearing After Image: Fig. 1112.—Case of Diffuse Fibroma of the Breast with atendency to intracanaUcular growth. (C. B. Port«r, Trans- Am.Surgical Association, 1891.) female breast. The few cases of unilateral hyper-trophy, other than in the male, that are found in theliterature are of doubtful pathology, and probablyshould be classed with the fibroadenomata. Of theseventy cases collected by Albert, sis were stated tobe unilateral—three on the right and three on theleft side. Two varieties of diffuse idiopathic hypertrophyare recognized, (1) the virginal, which is the mostfrequent, and (2) the gestational form, which is lesscommonly met with. (1) Virginal Hypertrophy.—This lesion is of theyounger female breast, is relatively rare, and is char-acterized by a symmetrical enlargement of bothniammse. The enlargement begins, as a rule, nearthe period of puberty or even later, although in someinstances the affection would seem to have no re- REFERENCE HANDBOOK OF THE MEDICAL SCIENCES Breast, Diseases ot l

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