A 24-year-old male presents to the emergency department with a 36-hour history of periumbilical pain that migrated to the right lower quadrant, accompanied by anorexia, nausea, and low-grade fever (38.2°C). On examination, he has marked tenderness and guarding at McBurney's point with a positive Rovsing's sign. Ultrasound with graded compression shows the structure marked **B** — a non-compressible, blind-ending tubular structure measuring 8 mm in outer diameter with surrounding echogenic fat stranding and increased color Doppler flow. Which of the following is the most appropriate next step in management?
A. Percutaneous drainage of the appendix followed by interval appendectomy
B. Laparoscopic appendectomy with perioperative IV antibiotics (cefoxitin or piperacillin-tazobactam)
C. Conservative management with oral antibiotics and observation for 48 hours
D. CT abdomen with IV contrast to confirm diagnosis before surgery
Explanation
Why Laparoscopic appendectomy with perioperative IV antibiotics is right
The structure marked B represents acute appendicitis — a non-compressible, blind-ending tubular structure >6 mm in outer diameter on ultrasound, which is the diagnostic criterion for acute appendicitis. This patient has a classic presentation of acute uncomplicated appendicitis (Murphy's sequence: periumbilical pain migrating to RLQ, anorexia, nausea, fever, RLQ tenderness at McBurney's point, positive Rovsing's sign) with imaging confirmation. According to the Sabiston Textbook of Surgery and ACR Appropriateness Criteria, the standard of care for acute uncomplicated appendicitis is laparoscopic appendectomy with perioperative IV antibiotics covering gram-negatives and anaerobes (cefoxitin or piperacillin-tazobactam). Laparoscopy reduces wound infection and length of stay compared to open appendectomy. This patient has no features of complicated appendicitis (no abscess, no perforation), so immediate surgery is indicated.
Why each distractor is wrong
Conservative management with oral antibiotics and observation for 48 hours: While non-operative management with antibiotics (CODA trial) is an emerging option for selected adults with uncomplicated appendicitis, it has a ~30% recurrence rate within 5 years and is not the standard of care. This patient has clear clinical and imaging evidence of acute appendicitis requiring surgical intervention.
CT abdomen with IV contrast to confirm diagnosis before surgery: CT is highly sensitive (94-98%) and specific (~95%) for appendicitis in adults, but it is not necessary when ultrasound has already provided diagnostic confirmation. Delaying surgery with additional imaging in a patient with confirmed acute appendicitis increases the risk of perforation (which occurs in 20-30% of cases by 36-48 hours). CT is appropriate when ultrasound is equivocal or non-diagnostic.
Percutaneous drainage of the appendix followed by interval appendectomy: Percutaneous drainage is reserved for complicated appendicitis with a contained abscess >3 cm, not for uncomplicated acute appendicitis. This patient has no evidence of abscess formation or perforation, so drainage is not indicated.
High-YieldNEET PG
Acute appendicitis (non-compressible appendix >6 mm on ultrasound) in an uncomplicated case requires immediate laparoscopic appendectomy with IV antibiotics; percutaneous drainage is only for abscess >3 cm; non-operative antibiotics are an emerging but not standard option.
Sabiston Textbook of Surgery 21e; ACR Appropriateness Criteria — RLQ Pain 2023
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