Case Presentation: A 76-year old man presented to emergency department for 2-week history of right buttock pain, swelling, and drainage. On presentation, he had a temperature of 101.3 F, otherwise hemodynamically stable. Physical examination revealed right buttock erythema and serosanguinous purulence (figure). There were no cardiac murmurs. Leukocytes count was within normal limits. CT abdomen […]