In a patient who recently underwent laparoscopic cholecystectomy and now presents with only abdominal tenderness without CT imaging, what is the most likely diagnosis?

Bile Duct Injury (BDI) is the Most Likely Diagnosis

In a patient presenting with abdominal tenderness after laparoscopic cholecystectomy without CT imaging, bile duct injury should be strongly suspected and requires immediate investigation. The absence of CT imaging does not exclude this serious complication, which carries significant morbidity and mortality (up to 3.5%) 1.

Clinical Reasoning

Why BDI is the Primary Concern

Abdominal tenderness following laparoscopic cholecystectomy is an alarm symptom that demands prompt investigation 1. According to the 2020 WSES guidelines, patients who do not rapidly recover after LC with symptoms including abdominal pain, distention, fever, jaundice, nausea, or vomiting should be promptly investigated for BDI 1.

The two most common clinical presentations of BDI are:

• Bile leakage: Leading to biloma, abscess, or biliary peritonitis with persistent abdominal pain and tenderness (jaundice typically absent or mild) 1
• Bile duct obstruction: Presenting with delayed cholestatic jaundice, though early cases may show only pain 1

Critical Next Steps Despite No CT

Even without CT imaging, you must proceed with diagnostic workup immediately:

1. Obtain liver function tests: Direct and indirect bilirubin, AST, ALT, ALP, GGT, and albumin 1. In critically ill patients, add CRP, PCT, and lactate to assess sepsis severity 1.

2. Proceed to imaging urgently: The 2020 WSES guidelines recommend abdominal triphasic CT as first-line imaging to detect intra-abdominal fluid collections and ductal dilation 1. This should be complemented with CE-MRCP for exact visualization and classification of BDI 1.

3. Start broad-spectrum antibiotics if infection suspected: Use piperacillin/tazobactam, imipenem/cilastatin, or meropenem if biliary fistula, biloma, or bile peritonitis is suspected 1.

Common Pitfalls to Avoid

• Do not dismiss normal or mildly elevated liver enzymes: Early BDI may not show significant biochemical abnormalities, especially with bile leaks where peritoneal absorption prevents cholestasis 1
• Do not delay imaging: The clinical presentation alone warrants investigation regardless of laboratory findings 1
• Do not assume other diagnoses without excluding BDI: While post-cholecystectomy abscess 2, retained stones 3, or even bowel complications 4 are possible, BDI has the highest morbidity and mortality risk

Alternative Diagnoses (Less Likely but Consider)

While BDI is most concerning given its severity:

• Post-operative abscess in the gallbladder fossa 2
• Cystic duct stump leak 5, 6, 7
• Retained/dropped stones 2

However, these complications often overlap with or result from BDI, and the diagnostic approach remains the same.

Management Algorithm

If drain is present and shows bile: Observe initially, but if no improvement or worsening occurs, ERCP with sphincterotomy and stent placement becomes mandatory 1

If no drain present: Percutaneous drainage of any collection is essential 1

If major BDI confirmed within 72 hours: Refer to HPB center for urgent surgical repair with Roux-en-Y hepaticojejunostomy 1

If diffuse biliary peritonitis: Urgent abdominal lavage and drainage required for source control 1

The key message: abdominal tenderness post-cholecystectomy is BDI until proven otherwise, and CT imaging must be obtained urgently to guide definitive management 1.