cases, extremity Week 208: Case 1 April 26, 2023 pathadmin 1. Presented by Edward McCarthy, M.D. and prepared by Jon Davison, M.D.An 18 year old man had a lump in his lower leg which was increasing in firmness over the past several months. A radiograph demonstrated a well defined radiodensity in the back of his knee.images/JMD_1-17-05_SPWC/Case_1/1.jpgimages/JMD_1-17-05_SPWC/Case_1/2.jpgimages/JMD_1-17-05_SPWC/Case_1/3.jpgimages/JMD_1-17-05_SPWC/Case_1/4.jpgOsteogenic sarcomaHeterotopic ossificationChondrosarcomaTumoral calcinosis Loading...