Summary

Portrait of Alexis Thomson Alexis Thomson Manual of Surgery, Sixth Edition… (1921)

Malignant tumours may be primary in the muscle, or may result from extension from adjacent growths--for example, implication of the pectoral muscle in cancer of the breast--or they may be derived from tumours situated elsewhere. The diagnosis of an intra-muscular tumour is made by observing that the swelling is situated beneath the deep fascia, that it becomes firm and fixed when the muscle contracts, and that, when the muscle is relaxed, it becomes softer, and can be moved in the transverse axis of the muscle, but not in its long axis.
Source: Wikisource

Portrait of Alexis Thomson Alexis Thomson Manual of Surgery, Sixth Edition… (1921)

The site of rupture in individual muscles is remarkably constant, and is usually at the junction of the muscular and tendinous portions. When rupture takes place through the belly of a muscle, the ends retract, the amount of retraction depending on the length of the muscle, and the extent of its attachment to adjacent aponeurosis or bone. The biceps in the arm, and the sartorius in the thigh, furnish examples of muscles in which the separation between the ends may be considerable.
Source: Wikisource

Portrait of Alexis Thomson Alexis Thomson Manual of Surgery, Sixth Edition… (1921)

Sometimes the effort is one that would scarcely be thought likely to rupture a muscle, as in the case recorded by Pagenstecher, where a professional athlete, while sitting at table, ruptured his biceps in a sudden effort to catch a falling glass. It would appear that the rupture is brought about not so much by the contraction of the muscle concerned, as by the contraction of the antagonistic muscles taking place before that of the muscle which undergoes rupture is completed. The violent muscular contractions of epilepsy, tetanus, or delirium rarely cause rupture.
Source: Wikisource

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