. A practical treatise on tumors of the mammary gland: . rating epithelioma, to distinguish it from adeno-ma. Adenoma would then be regarded as typical, non-carcinomatous, or circumscribed epithelioma. Fromthe fact, however, that the epithelial elements ofadenoma may be, and usually are, irregular in theirsize, form, and arrangement, and thus produce an aty-pical epithelioma, which differs mdely in its stiiic-ture and life from carcinoma, the term had best bedropped altogether. As I have just pointed out, adenomata are usuallycomposed of enlarged acini, with aberrations in thecharacters of the
. A practical treatise on tumors of the mammary gland: . rating epithelioma, to distinguish it from adeno-ma. Adenoma would then be regarded as typical, non-carcinomatous, or circumscribed epithelioma. Fromthe fact, however, that the epithelial elements ofadenoma may be, and usually are, irregular in theirsize, form, and arrangement, and thus produce an aty-pical epithelioma, which differs mdely in its stiiic-ture and life from carcinoma, the term had best bedropped altogether. As I have just pointed out, adenomata are usuallycomposed of enlarged acini, with aberrations in thecharacters of their investing epithelium, althoughthey may be constituted mainly of newly formed Op. cit, p. 537. 6 75j^^ bj i^;ii^ p 147^ Op. cit., p. 333. ■» Op. cit, ante. Op. cit., ante. 8 i^^ ^it., ante. * Op. cit., t. V, p. 632. » Op. cit, p. 1201. ^ Virchows Archiv, Bd. xxiv, p. 326. o Op. cit., ante. 116 AI^ATOMT. ducts. When the acini predominate, they may betermed acinous; while they may be called tubularwhen the ducts preponderate. Of the eighteen cases,. Cystic Tubular Adenoma.—a, Dilated and cystic acinus, giving off nine pro-longations, in the form of tubes lined by columnar epithelium, which pur-sue, as a rule, a ])arallel course, but now and then divide and anastomo?eMith one another and with offshoots from other acini, one of which is par-tially represented at h. The majority preserved their himon throughout,although they frequently terminated in attenuated, solid, cellular processes,which sometimes were turned upon themselves. The intertubular youngconnective tissue was so very scanty that, on transverse section, many ofthe closely crowded tubules appeared to be separated merely by theiradventitia. ADENOMA. 117 eleven were cystic acinous growths. These includethree recorded by Labbe and Coyne/ two by Fo-chier,* and one, respectively, by Steudener,* Neu-mann,* Billroth, Nancrede, Klotz,^ and myself. Sev-en were tubular; two of these are recorded byLanghans, and one each b
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