RT Book, Section A1 Ritter, Kathryn A1 Fitch, Robert Warne A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1181043500 T1 Gas Gangrene (Myonecrosis) T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessmedicine.mhmedical.com/content.aspx?aid=1181043500 RD 2024/03/28 AB This infection causes rapid necrosis and liquefaction of fascia, muscle, and tendon. Most cases involve Clostridium perfringens; Streptococcus pyogenes accounts for most of the remaining cases. Myonecrosis is classically associated with trauma (including surgery) and diabetes. There is edematous bronze or purple discoloration, flaccid bullae with watery brown nonpurulent fluid, and a foul odor. The classic presentation is pain out of proportion to physical findings. Systemic signs are also typically present and may develop rapidly into shock.