Elements of pathological anatomy (1843) Elements of pathological anatomy elementsofpathol01gros Year: 1843 288 ARTERIES. [chap. V. trie layers, (Fig. 22,) is sometimes remarkably abundant. Its thickness commonly varies from six to eight lines, according to the age and Fig. 22. size of the sac, but occasionally it has been known to exceed two inches. The oldest lamellae, or those lying directly in contact with the inner surface of the tumor, are generally of a whitish, gray- ish, or yellowish color, remarkably hard, dry, and brittle ; whereas, those which are of recent formation, are always
Elements of pathological anatomy (1843) Elements of pathological anatomy elementsofpathol01gros Year: 1843 288 ARTERIES. [chap. V. trie layers, (Fig. 22,) is sometimes remarkably abundant. Its thickness commonly varies from six to eight lines, according to the age and Fig. 22. size of the sac, but occasionally it has been known to exceed two inches. The oldest lamellae, or those lying directly in contact with the inner surface of the tumor, are generally of a whitish, gray- ish, or yellowish color, remarkably hard, dry, and brittle ; whereas, those which are of recent formation, are always of a darker hue, soft, and elastic. The occurrence of aneurism is much more frequent in men than in women, and in the old than in the young. Of sixty-three cases, recorded by Mr. Hodg- ^^fllT son, of England, in his admirable Trea- III tise on the Diseases of the Arteries, fifty- six were noticed in the male, and seven only in the female. Similar observations have been made by Scarpa, Guthrie, Langenbeck, and other pathologists. Aneurismal dilatation of the pulmonary artery is extremely rare, and, thus far, I do not remember having met with a well-marked example of it. We have already stated that aneurism is much more fre- quent in old than in young persons. In confirmation of the truth of this remark, I may mention that of one hundred and eight cases, collected by Dr. Bizot of Geneva,* from the writ- ings of Morgagni, Corvisart, Laennec, Scarpa, Boyer, Hodg- son, Richerand, and S. Cooper, only a single one occurred before the twentieth year. Fifteen were noticed from the age of twenty to twenty-nine ; thirty-five from thirty to thirty-nine; thirty-one from forty to forty-nine ; fourteen from fifty to fifty-nine ; eight from sixty to sixty-nine; two from seventy to seventy-nine ; and two from eighty to eighty- nine. Thus it would appear that more persons suffer under this malady from the age of thirty to fifty, than during all the other periods of life put together. The bad ef
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