. A radiographic atlas of the pathologic changes of bones and joints . 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 PLATE XXVII. -84- PLATE XXVIII. OSTEO-SARCOMA OF THE UPPER END OF THE HUMERUS—PATHOLOGICALFRACTURE. The upper end of the humerus is enla
. A radiographic atlas of the pathologic changes of bones and joints . 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 PLATE XXVII. -84- PLATE XXVIII. OSTEO-SARCOMA OF THE UPPER END OF THE HUMERUS—PATHOLOGICALFRACTURE. The upper end of the humerus is enlarged, and its normal shadow isreplaced by the characteristic appearance of osteo-sarcoma. The disease has perforated the thin, bony envelope encasing the growthon the inner border, and in that location it invades the soft parts. There is a pathological fracture present. The contrast between the diseased bone above the fracture and theunaffected shaft below it is well marked. The soft parts about the fractured ends of the diseased bone are in-volved by the disease.
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