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Zorluk: OrtaInterpreting Imaging Results

A 52-year-old woman is evaluated in the emergency department for left lower quadrant abdominal pain and fever that began 24 hours ago. The pain is constant and severe. Her past medical history is significant for obesity and chronic constipation. Her temperature is 38.3°C (100.9°F), blood pressure is 128/82 mm Hg, pulse is 98/min, and respirations are 16/min. Physical examination reveals focal tenderness to palpation in the left lower quadrant with voluntary guarding, but no rebound tenderness or rigidity. Laboratory studies show a leukocyte count of 16,500/mm³. A computed tomography (CT) scan of the abdomen and pelvis with intravenous and oral contrast demonstrates focal wall thickening of the sigmoid colon, prominent pericolic fat stranding, and an adjacent 4.5-cm well-circumscribed, rim-enhancing fluid collection. No free intraperitoneal air is observed. Based on these imaging findings, which of the following is the most appropriate next step in management?

  1. Percutaneous image-guided catheter drainageCevap
  2. B
    Admission for intravenous antibiotics and bowel rest alone
  3. C
    Emergent exploratory laparotomy with sigmoid resection
  4. D
    Urgent colonoscopy to evaluate for underlying malignancy
  5. E
    Discharge home with oral antibiotics and clear liquid diet

Cevap

The most appropriate next step is percutaneous image-guided catheter drainage.
The correct answer is percutaneous image-guided catheter drainage. The patient's clinical presentation and CT imaging (sigmoid colon wall thickening, fat stranding) are characteristic of acute diverticulitis. Furthermore, the CT reveals a 4.5-cm rim-enhancing fluid collection, which represents a diverticular abscess (categorized as complicated diverticulitis). The standard management for a diverticular abscess greater than 3 to 4 cm in diameter is percutaneous image-guided drainage (usually via CT or ultrasound) combined with intravenous antibiotics and bowel rest. Abscesses smaller than 3 cm can typically be managed conservatively with intravenous antibiotics alone.

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1
Evaluate the patient's clinical presentation and vital signs.
The patient has signs of systemic infection (fever, leukocytosis) and localized left lower quadrant peritonitis (focal tenderness, guarding), suggesting acute colonic inflammation.
To establish the initial clinical suspicion and determine the severity of the presentation.
2
Analyze the findings on the computed tomography (CT) scan.
The CT scan shows sigmoid colon wall thickening and pericolic fat stranding, confirming diverticulitis. Crucially, it also reveals a 4.5-cm rim-enhancing fluid collection.
To differentiate uncomplicated diverticulitis from complicated diverticulitis, which dictates the treatment pathway.
3
Determine the appropriate management based on the specific imaging findings.
The 4.5-cm fluid collection indicates a large diverticular abscess. The standard of care for an abscess greater than 3 cm is percutaneous image-guided drainage in addition to antibiotics.
Antibiotics alone have a high failure rate for large abscesses, while emergent surgery is an overly aggressive first step for a contained abscess without generalized peritonitis.

Anahtar Kavram

Complicated diverticulitis with an abscess greater than 3 to 4 cm should be managed initially with percutaneous image-guided drainage, intravenous antibiotics, and bowel rest.
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Interpreting Imaging Results

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