A 44-year-old woman presents to her physician with recurrent episodes of right upper quadrant abdominal pain. During the past 6 months, she has experienced five episodes of pain that begin approximately 1 hour after eating fatty meals. The pain gradually intensifies, lasts about 2–3 hours, and then completely resolves. She denies fever, chills, jaundice, vomiting, or persistent symptoms. Her medical history is significant only for obesity. She does not take any medications. Temperature is 36.9°C (98.4°F), blood pressure is 124/76 mm Hg, pulse is 78/min, and respiratory rate is 14/min. Physical examination is normal. Laboratory studies reveal the following:
Right upper quadrant ultrasonography demonstrates multiple gallstones without gallbladder wall thickening, pericholecystic fluid, or biliary ductal dilation.
Which of the following is the most appropriate management?
The correct answer is:
B) Elective laparoscopic cholecystectomy
This patient has symptomatic cholelithiasis presenting as biliary colic. The diagnosis is supported by episodic right upper quadrant pain triggered by fatty meals, complete resolution between episodes, normal laboratory studies, and ultrasonographic evidence of gallstones without inflammation. The absence of fever, leukocytosis, jaundice, and persistent pain helps distinguish biliary colic from more serious gallstone complications.
Biliary colic occurs when a gallstone transiently obstructs the cystic duct. Following a meal, especially one rich in fat, cholecystokinin stimulates gallbladder contraction. If a stone temporarily blocks the cystic duct, increased intraluminal pressure produces pain. Because the obstruction eventually resolves, symptoms subside and laboratory studies remain normal. In contrast, persistent cystic duct obstruction leads to acute cholecystitis, which causes prolonged pain, fever, leukocytosis, and gallbladder wall thickening.
Patients with symptomatic gallstones should undergo elective laparoscopic cholecystectomy because recurrent attacks are common and future complications may occur. These complications include acute cholecystitis, choledocholithiasis, acute cholangitis, and gallstone pancreatitis. Step 2 frequently tests the distinction between asymptomatic gallstones, which generally do not require treatment, and symptomatic gallstones, which warrant definitive surgical management.
Answer choice A: Emergent ERCP, is incorrect.
ERCP is indicated for choledocholithiasis or acute cholangitis when common bile duct obstruction is suspected. This patient has normal liver tests, no jaundice, and no evidence of biliary obstruction beyond the gallbladder.
Answer choice C: Intravenous broad-spectrum antibiotics, is incorrect.
Students may associate gallstones with acute cholecystitis. However, this patient has biliary colic rather than infection. She lacks fever, leukocytosis, and imaging findings of gallbladder inflammation.
Answer choice D: Observation without treatment, is incorrect.
Observation is generally appropriate for asymptomatic gallstones discovered incidentally. Once symptoms develop, recurrence is common and elective cholecystectomy is recommended.
Answer choice E: Percutaneous cholecystostomy, is incorrect.
Percutaneous cholecystostomy is reserved for critically ill patients with acute cholecystitis who are poor surgical candidates. It is not indicated for uncomplicated biliary colic.
Key Learning Point
Biliary colic results from transient cystic duct obstruction by gallstones and is characterized by episodic postprandial right upper quadrant pain with normal laboratory studies. Symptomatic patients should undergo elective laparoscopic cholecystectomy.
