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Show 2th OF TUMOUBS. of IUMOURS. use. The medium into which the vessels pass influence their activity, we might say, but I believe this is not the entire truth ;-an artery does not bore and work its way into a 00agulum as has been described. Some people's minds are ea- I. IxcrerD TUMOURS. (Cg/Midas.) sily satisfied! and when they think of the force of the circulation, they conceive it an evident and likely thing that the blood forces its way forward ; that the arteries push out and enter this substance, without ever imagining it necessary to consider how vems, and lymphatics, and nerves make their way into this new matter. It appears to me, that this se~ creted coagulum in the very act of its formation receives its character; that its structure is already determined ~, that the tract of its vessels is laid ; that the parts are in embryo ; when blood is received, the previous determined structure 'WE must distinguish the term cyst from capsule, which latter I think ought to signify the condensation of the cellu» lar substance round a solid tumour. The incysted tumours consist of a cyst, the contents of which are secreted by its inner surface. Hrnarmrs. Delicate incysted tumours often gregate; and entangled in the cellular membrane. .‘ influences the secretion to be drawn from it, as in all other instances. new Even here, in the first step of our inquiry, we are at a loss to mark the distinction betwixt tumours of the cellular membrane, and those transparent bags uniformly round and Thus far we have been speaking of natural changes of re novation;-tumours are unhealthy superstructures. If tumour forms from coagulum, that coagulum is not the mere blood escaped from the vessels, but a coagulable part secreted by the vessels of the surface, under a peculiar influence in their action; and according to that action is the growth of i i l tl . .: (.N-w'fi" -‘tvwfww ,. .v‘.. .. ‘u' .mwr't-r‘. -.""‘-‘"""‘A .-..~ f the future tumour. Its character, the matter secreted into it, and the proper substance of it, depend on the original formation; in other words on the influence of the vessels which secreted the coagulum. The following scheme of tumours, reduced under four heads, I hope will he found a suitable introduction to my . bservations on the manner of extirpating them. The incysted tumours containing lymph, or serum, have been called fiygroma. smooth, filled with clear water, and which have no adhesion, which are distinct animals : " they produce their like, and multiply." Although these animals cannot be considered as tumours, being themselves animals, yet they become a character of disease, since I imagine that there is a previous nidus for them in achange of vascular structure, or action. There is yet a third. distinction under the head hydatid, more distinctly animals, the {min hydaziginea. These I have found in the monkey, sheep, and hare. Thley adhere to the vascular mem-, branes of the viscera, by a pendulous membranous sac, which has vessels branching on it ; within this sac the hydatid is contained quite loose. Some of them in the same animal 1 have seen with one mouth, some with two, and others smooth without any, which led me to doubt whether these white corrugated projections on the sac were indeed the mouths of the animal. I have found a worm like the tenia, and these tenia hydatiginea floating loose in the abdomen ofthe same animal. Gsxemox. A solitary incysted tumour, connected with ten dons, or ligaments. Barrera. (See Diseases of the Mouth.) An incysted tu- mour under the tongue, or projecting on the inside of the cheek. wrw‘v; '. i"‘."' "Tflq won AIME)?" |
