cases, extremity Week 111: Case 1 April 26, 2023 pathadmin 1. Presented by Edward McCarthy, M.D. and prepared by Anil Parwani, M.D.,Ph.DA 15 year old boy had a lump in his upper arm which was increasing in firmness over the past several months. A radiograph demonstrated a well defined radiodensity in the area of his biceps muscle.images/102102case1fig1.jpgimages/102102case1fig1.jpgimages/102102case1fig1.jpgimages/102102case1fig1.jpgimages/102102case1fig1.jpgOsteogenic sarcomaHeterotopic ossificationChondrosarcoma Loading...