. General surgical pathology and therapeutics, in fifty-one lectures .. . Central osteosarcoma of the lower jaw of a girlnine years old. Section of the specimen shown in Fig. 141. bone then appears puffed up like a bladder, and the tumor does notalways cause a complete solution of its continuit}. When these sar-comata occur in the lower extremity, they become very vascular ;numbers of small traumatic aneurisms develop in them, and a trueaneurismal murmur may be heard in them, so that they are often con-sidered and described as true bone-aneurisms. The cystosarcomataand compound cysts, which ar
. General surgical pathology and therapeutics, in fifty-one lectures .. . Central osteosarcoma of the lower jaw of a girlnine years old. Section of the specimen shown in Fig. 141. bone then appears puffed up like a bladder, and the tumor does notalways cause a complete solution of its continuit}. When these sar-comata occur in the lower extremity, they become very vascular ;numbers of small traumatic aneurisms develop in them, and a trueaneurismal murmur may be heard in them, so that they are often con-sidered and described as true bone-aneurisms. The cystosarcomataand compound cysts, which are occasionally seen in bones, especiallyin the lower jaw, also in large hollow bones, have usually developedfrom osteosarcomata (Fig. 144). Central osteosarcomata are usuallysolitary, very rarely generally infectious. In the lower or upper jawthey are apt to come at the time of the second dentition, rarely atthe first: in the long bones I have only seen them at middle age; ofthe tumors called epulis (the word means located on the gums) a SARCOMATA. 657 large number bel
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