. A radiographic atlas of the pathologic changes of bones and joints . 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
. A radiographic atlas of the pathologic changes of bones and joints . 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 PLATE XXVIII. — 86 — PLATE XXIX. OSTEO-SAECOMA OF THE FEMUR—PATHOLOGICAL FRACTURE. The tumor mass, including the ends of the fractured bone and involvingthe surrounding soft parts, presents the characteristic appearance of osteo-sarcoma.
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