The principles of surgery . altered portion of the nerve affectedcan be safely and completely taken away. TUMORS OF NERVES. 551 Tumors of Nerves. All tumors are liable to occur in connection with the nervous tissue ;but two are peculiar to it, the Neuroma,and Painful tubercle. Neuroma.—This is a simple tumor,and, like the painful tubercle, is of thenature of fibro-cartilage ; consisting ofdense plastic matter lodged amongst thefibrils of the nervous tissue, which arethereby separated, and usually renderedthe seat of perverted sensation. Some-times, the formation occurs spontane-ously ; more fr
The principles of surgery . altered portion of the nerve affectedcan be safely and completely taken away. TUMORS OF NERVES. 551 Tumors of Nerves. All tumors are liable to occur in connection with the nervous tissue ;but two are peculiar to it, the Neuroma,and Painful tubercle. Neuroma.—This is a simple tumor,and, like the painful tubercle, is of thenature of fibro-cartilage ; consisting ofdense plastic matter lodged amongst thefibrils of the nervous tissue, which arethereby separated, and usually renderedthe seat of perverted sensation. Some-times, the formation occurs spontane-ously ; more frequently, it follows re-motely on wound, or other external in-jury. It may take place in the courseof an undivided nerve; more frequently,it forms on the truncated extremity, afterdivision. When in the former situationit usually arises without any appreci-able cause ; is of an oval shape; ^nd may attain to the size of a pruneor small egg. Above and below the enlarged part, the nerve resumesits wonted form and Section of a neuroma; three nervoustrunks terminating in it. The fibrous ar-rangement shown, as observed by the nakedeye.—Smith.
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