. A radiographic atlas of the pathologic changes of bones and joints . PLATE XXV. •8o — PLATE XXVI. OSTEO-SARCOMA OF THE UPPER END OF THE HUMERUS—SECONDARY INVOLVE-MENT OF THE SOFT PARTS. The upper extremity of the humerus is enormously enlarged, and itsnormal structure is replaced by the characteristic appearance of osteo-sarcoma. The disease has perforated the thin, bony envelope encasing the tumornotably on the inner and outer borders, and in these places it invades thesoft parts; its outline is lost, and its shadow blends with that of the lattertissues. The shoulder joint is not
. A radiographic atlas of the pathologic changes of bones and joints . PLATE XXV. •8o — PLATE XXVI. OSTEO-SARCOMA OF THE UPPER END OF THE HUMERUS—SECONDARY INVOLVE-MENT OF THE SOFT PARTS. The upper extremity of the humerus is enormously enlarged, and itsnormal structure is replaced by the characteristic appearance of osteo-sarcoma. The disease has perforated the thin, bony envelope encasing the tumornotably on the inner and outer borders, and in these places it invades thesoft parts; its outline is lost, and its shadow blends with that of the lattertissues. The shoulder joint is not PLATE XXVI. — 82 — PLATE XXVII. IMMENSE OSTEO-SARCOMA OF THE LOWER END OF THE FEMUR—INVOLVEMENTOF THE KNEE JOINT. This skiagram sliows the latter stages of osteo-sarcoma. A large mass, presenting the characteristic appearance of osteo-sarcoma,replaces the normal shadovis of the lower end of the femur and of theknee joint. The peri-articular tissues and surrounding soft parts are involved.
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