Revision as of 07:10, 16 September 2013 by Ochuko Ajari(talk | contribs)(Created page with "{{WBRQuestion |QuestionAuthor={{Ochuko}} |ExamType=USMLE Step 1 |MainCategory=Pathophysiology |SubCategory=Dermatology |MainCategory=Pathophysiology |SubCategory=Dermatology |...")
[[Prompt::A 42 –year old man presents to the ED with a 3-day history of fever, chills and facial pain. There was a history of a cut to his face while shaving. Physical examination revealed a very red and swollen skin lesion with blisters and a raised border that is warm to touch on the left side of the face. Which of the following mechanisms is true about the lesion?]]
[[Explanation::This is a case of Erysipelas of the face due to group A streptococcus. Signs of acute inflammation present in this patient include Rubor (redness), Calor (warm to touch), Tumor (swelling) and Dolor (pain). The infection is associated with a warm skin (calor) and pain (dolor). The redness and warmth experienced by this patient is due to histamine-mediated vasodilation of arterioles