An Unusual Case of Intraabdominal Abscess After a Colonoscopy With Polypectomy

Francis Atemnkeng, Amna Al-Ttkrit, Sharoon David, Harith Alataby, Abhiram Nagaraj, Keith Diaz, Jay Nfonoyim

Abstract


The use of colonoscopies in the screening of colorectal cancers has helped in the early detection and treatment of these cancers. Less than 0.5% of patients develop colonoscopy complications, mostly bleeding, and less frequently, perforations. There have been very few reported cases of micro-perforations following colonoscopies. We present a case of a 66-year-old female smoker who had undergone a screening colonoscopy for colorectal cancer with two polyps removed 3 weeks prior, who was brought to the hospital because of altered mental status and hypotension. A computed tomography (CT) scan of the abdomen and pelvis with contrast demonstrated intraabdominal abscess which was drained by interventional radiology. A culture of the pus grew Streptococcus constellatus, a pus-forming bacterium. She was treated with ceftriaxone and metronidazole for a total of 6 weeks, and a repeat CT of abdomen and pelvis demonstrated complete resolution. The only contributing factor to the formation of the intraabdominal abscess was a screening colonoscopy with polypectomy, which might have caused micro-perforations in the colon with the seeding of Streptococcus constellatus. The occurrence of intraabdominal abscess following a colonoscopy is very rare, and requires a high index of suspicion in patients who present with sepsis following colonoscopies.




J Med Cases. 2021;12(8):301-305
doi: https://doi.org/10.14740/jmc3730

Keywords


Streptococcus constellatus; Streptococcus anginosus; Streptococcus milleri; Intraabdominal abscess; Colonoscopy; Polypectomy

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