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Zorluk: Çok zorGastroenterology and Hepatology

A 6262-year-old man presents to the emergency department with a 33-day history of worsening left lower quadrant abdominal pain, fever, and anorexia. His temperature is 38.8∘C38.8^\circ\text{C} (101.8∘F101.8^\circ\text{F}), blood pressure is 122/78 mm Hg122/78\text{ mm Hg}, and pulse is 102/min102/\text{min}. Physical examination demonstrates significant focal tenderness and guarding in the left lower quadrant without diffuse peritonitis. Laboratory testing shows a leukocyte count of 17,200/mm317,200/\text{mm}^3 with a left shift. Empiric broad-spectrum intravenous antibiotics are initiated immediately. Assuming the initial diagnostic imaging confirms acute complicated diverticulitis with a 5 cm5\text{ cm} pericolic abscess, arrange the following management steps in the most appropriate chronological sequence.

  1. 1Obtain computed tomography (CT) of the abdomen and pelvis with intravenous contrast
  2. 2Perform percutaneous image-guided catheter drainage of the pericolic abscess
  3. 3De-escalate empiric broad-spectrum antibiotics to targeted therapy based on fluid culture results
  4. 4Perform diagnostic colonoscopy 66 to 88 weeks after resolution of the acute episode
  5. 5Consult general surgery for elective segmental sigmoid resection

Cevap

The correct chronological sequence for managing this patient is: 1) CT of the abdomen and pelvis with contrast, 2) Percutaneous image-guided catheter drainage, 3) De-escalation to targeted antibiotics, 4) Delayed diagnostic colonoscopy, and 5) Elective segmental sigmoid resection.
The standard of care for suspected acute diverticulitis begins with diagnostic CT imaging. Upon identification of a macro-abscess (generally >3 cm>3\text{ cm}), the immediate next step is percutaneous drainage to achieve source control. Once cultures are obtained from the drain, broad-spectrum antibiotics should be de-escalated to targeted therapy to adhere to antibiotic stewardship guidelines. After the acute episode fully resolves (typically 66 to 88 weeks later), a delayed colonoscopy is mandatory to rule out an underlying malignancy that may have precipitated the perforation. Finally, because the patient experienced a complicated episode (abscess), they should be evaluated for a definitive elective sigmoid resection to prevent future life-threatening recurrences.

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1
Obtain CT of the abdomen and pelvis with contrast
Confirms the diagnosis of acute complicated diverticulitis and localizes the 5 cm5\text{ cm} pericolic abscess.
This is the safest and most accurate initial diagnostic test. Acute colonoscopy is strictly contraindicated due to perforation risk.
2
Perform percutaneous image-guided catheter drainage
Achieves prompt source control of the infection and provides fluid for microbiological culture.
Abscesses larger than 33 to 4 cm4\text{ cm} typically do not resolve with antibiotics alone and require drainage. This avoids emergency multi-stage surgery (Hartmann procedure).
3
De-escalate empiric antibiotics to targeted therapy
Narrows the antimicrobial spectrum based on specific culture sensitivities from the drained fluid.
Aligns with antibiotic stewardship to prevent resistance and secondary infections (e.g., C. difficile) once the pathogen is identified.
4
Perform delayed diagnostic colonoscopy
Evaluates the colonic mucosa to rule out underlying malignancy.
Diverticulitis can radiographically mimic colon cancer. Delaying the procedure 66 to 88 weeks allows inflammation to subside, minimizing perforation risk.
5
Consult surgery for elective resection
Removes the diseased segment of the sigmoid colon in a controlled, single-stage operation.
Patients who survive an episode of complicated diverticulitis are at high risk for recurrence, making elective resection the definitive long-term treatment.

Anahtar Kavram

Management algorithm for acute complicated diverticulitis with abscess formation
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Gastroenterology and Hepatology

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