Elements of pathological anatomy . and with profuse discharges of bloodfrom different parts of the body. The lesion is sometimes partial, and consists apparently in a removal of the paren-chymatous texture of the organ,leaving merely the original fibrousframework. Tubercles are not uncommon in thespleen. I have seen them repeat-edly in this organ in children, butonly three or four times in the adult,and never in the very aged. In oneinstance, I met with them in an in-fant only a few months old; theywere very small, solid, and so nu-merous that the organ was completelycrowded with them. Tubercl
Elements of pathological anatomy . and with profuse discharges of bloodfrom different parts of the body. The lesion is sometimes partial, and consists apparently in a removal of the paren-chymatous texture of the organ,leaving merely the original fibrousframework. Tubercles are not uncommon in thespleen. I have seen them repeat-edly in this organ in children, butonly three or four times in the adult,and never in the very aged. In oneinstance, I met with them in an in-fant only a few months old; theywere very small, solid, and so nu-merous that the organ was completelycrowded with them. Tubercles ofthe spleen seldom occur in clusters,and, excepting in adults, they do notoften acquire a great size. Occa-sionally, though rarely, they soften,and form numerous small abscesses,filled with thick, curdy matter. Theselittle bodies are not peculiar to thehuman spleen ; Andral has repeatedlyfound them in the horse, and Rey-naud in the monkey. They seldomlead to fatal results, either in man orin animals : and, in the present state. MELANOSIS —HYDATIDS. 681 of our knowledge, we know of no symptoms which are indicative of their pre-sence. In most cases they exist at the same time in the lungs. When largeand numerous, they are apt to excite inflammation in the neighboring portionsof the peritonaeum, leading to ascitic accumulations. Fig. 178 is a beautifulrepresentation of encysted tubercles of the spleen, from a specimen in thepossession of Dr. Bayless. They are of large size, and of a pale yellowishcolor; some are partially softened, but most are in a crude state. Melanosis of the spleen is rare, and I have never seen an example of also mention a deposition of fatty substance, as an occasional pheno-menon ; and encephaloid matter is likewise,I presume, sometimes found. Allthese lesions are uncommon, and there are no symptoms by which they can bediscriminated during life. The spleen is not unfrequently the seat of calcareous concretions; theyare always isolated, usua
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