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Zorluk: Çok zorInterpreting Imaging Results

A 38-year-old woman is evaluated in the emergency department for severe, progressive abdominal pain and an inability to pass flatus for the past 24 hours. She describes the pain as cramping and constant. Her past medical history is notable only for an uncomplicated appendectomy at age 18. Her temperature is 37.6°C (99.7°F), blood pressure is 112/74 mmHg, heart rate is 108/min, and respiratory rate is 18/min. Physical examination reveals a markedly distended and tympanitic abdomen with significant tenderness localized to the right lower quadrant. There is no rigidity or rebound tenderness. Laboratory studies are significant for a leukocyte count of 11,500/mm311,500 / \text{mm}^3. The patient receives intravenous fluid resuscitation, and a nasogastric tube is placed for decompression. A contrast-enhanced CT scan of the abdomen and pelvis is performed. The imaging demonstrates a massively dilated, ovoid segment of the large bowel with a 'coffee bean' appearance that extends from the right lower quadrant toward the left upper quadrant. A 'whirl sign' composed of twisted mesenteric vessels and surrounding fat is clearly identified in the right iliac fossa. The colon distal to this area is completely collapsed, and there is no evidence of pneumoperitoneum. Based on the interpretation of these imaging findings, which of the following is the most appropriate next step in management?

  1. Urgent exploratory laparotomyCevap
  2. B
    Flexible sigmoidoscopy
  3. C
    Intravenous neostigmine administration
  4. D
    Water-soluble contrast enema
  5. E
    Observation with serial abdominal radiographs

Cevap

Urgent exploratory laparotomy is the appropriate management for a cecal volvulus, which is indicated by the imaging findings of a 'coffee bean' sign pointing to the left upper quadrant and a right iliac fossa whirl sign.
The correct answer is urgent exploratory laparotomy because the patient's CT scan clearly demonstrates a cecal volvulus. The key differentiating imaging findings for cecal volvulus are a dilated loop of bowel resembling a coffee bean that extends from the right lower quadrant toward the left upper quadrant, along with a 'whirl sign' of the mesentery located in the right iliac fossa. Unlike sigmoid volvulus, which is initially managed endoscopically, cecal volvulus requires immediate surgical intervention (such as an ileocecal resection or cecopexy) due to the high risk of bowel necrosis and the poor success and high perforation rates associated with endoscopic detorsion.

Adım Adım Çözüm

1
Analyze the patient's presentation and laboratory findings.
A young woman with a history of abdominal surgery presents with acute mechanical bowel obstruction (colicky pain, obstipation, distention, leukocytosis).
To establish the acuity and primary etiology of the abdominal pain.
2
Interpret the specific findings on the CT scan.
The CT shows a dilated colonic segment ('coffee bean' sign) pointing from the right lower quadrant to the left upper quadrant, with a mesenteric 'whirl sign' in the right iliac fossa.
To identify the exact location and nature of the obstruction.
3
Formulate a definitive diagnosis based on the imaging.
The specific axis of the dilated loop (pointing to LUQ) and the right-sided whirl sign differentiate a cecal volvulus from a sigmoid volvulus (which points to RUQ).
Accurate differentiation is essential as their initial treatments differ drastically.
4
Determine the most appropriate management for the diagnosed condition.
Cecal volvulus requires urgent surgical exploration (laparotomy with resection or cecopexy), as endoscopic management is ineffective and unsafe.
To resolve the closed-loop obstruction and prevent bowel ischemia and perforation.

Anahtar Kavram

Differentiating cecal volvulus from sigmoid volvulus based on specific CT imaging patterns (axis of the 'coffee bean' sign and location of the 'whirl sign') to determine the correct management pathway (surgery vs. endoscopy).
Tahmini Süre:1m 30s
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Interpreting Imaging Results

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