FCOG-1253

FCOG-1253

A 27-year-old nulliparous woman presents with the complaint of malodorous vaginal discharge for the past one month. Patient has tried various over-the-counter vaginal douche products without any improvement. Her last menstrual period was 2 weeks ago, during which she noticed no change in her symptoms. In addition to the discharge, patient also experiences intermittent, crampy abdominal pain along with a feeling of gas passing through her vagina. Patient has had no history of surgeries in the past. On examination her vital signs seems to be normal. Speculum examination shows a malodorous, tan vaginal discharge with an erythematous patch over the posterior vaginal wall.The cervix is nulliparous and has no visible lesions or areas of friability.A sinus with purulent drainage is found in the perianal skin. Which among the following conditions will be the most likely underlying cause for this patient’s presentation?