Clinical Quiz #3

A 14-year-old girl presents with recurrent mucous bloody stool. She has received mezlazine 1x3 , Lactobacilli 1x3 ,zinc sulfate 1x1 and mega dose of multivitamins.She still compins of frequent loose and slimy stool. Proctoscopic exam as shown.
What is your diagnosis and further treatment?
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Contributed by Boosba Vivatvakin MD.King Chulalongkorn Memorial Hospital