. Archives of physical medicine and rehabilitation . ere is fibrous tissue with nocellular areas suggesting sarcoma; norwas I able to find any evidence ofmyxoma or chondroma. The muscleoutside of the tumor shows in the x-ray the tumor ap-pears to be chiefly bone, in the grossand in the sections it is largely fibroma. X-ray Result: March, 1921, oneyear and four months after operation(Fig. 13). We observe that in the de-fect after removal of the upper end ofthe fibula there is the shadow of a newgrowth of bone; it extends down theshaft of the upper end of the remainingportion o


. Archives of physical medicine and rehabilitation . ere is fibrous tissue with nocellular areas suggesting sarcoma; norwas I able to find any evidence ofmyxoma or chondroma. The muscleoutside of the tumor shows in the x-ray the tumor ap-pears to be chiefly bone, in the grossand in the sections it is largely fibroma. X-ray Result: March, 1921, oneyear and four months after operation(Fig. 13). We observe that in the de-fect after removal of the upper end ofthe fibula there is the shadow of a newgrowth of bone; it extends down theshaft of the upper end of the remainingportion of the fibula and overlaps theupper third of the tibia. This area pal-pates like bone. There is no tenderness. At this time Dr. Le Conte and discussed the possibilities. We wereall rather inclined to the view that itwas a benign growth of bone due to theossification of a postoperative hema-toma, or to the stripping of the perios-teum of the tibia, and further opera-tion was decided against. Apparentlythere is no doubt that the traumatic ossi-. Fig-. 14—Pathol. No. 27702. Case 1 12 1923. Benig-n (?) ex-cessive bone formation three yearsafter resection of the upper end ofthe fibula for tumor shown Is Fig-nra i8. Pig-. 15—Pathol. No. 27702. Case , 1 12 1923. Benign (?) ex-cessive bone formation three yearsafter resection of the upper end ofthe fibula for tumor shown in Fig-ure 12. 125 BOXE TUMORS: SARCOMA^BLOODGOOD fying periostitis and ossifying myositisare better left alone. The entire object of this paper is anattempt to differentiate these benign os-sifying lesions from the ossifying sar-coma. X-ray Ocioher II, 1922: The interval is now almost three years sincethe resection and almost two years sincethe last x-ray. On palpation there isa growth of bone from theknee-joint to the junction of the m:ddleand lower third of the leg. The bonesurrounds the shafts of the fibula andtibia. X-ray January 12, 1923: Thesex-rays are reproduced (Figs. 14 an


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