Spontaneous perforation of the common bile duct in adults presenting as biliary peritonitis: a case report and literature review

Spontaneous perforation of the common bile duct (SPCBD) is an exceptional disease, especially in adults. The cause is often idiopathic once trauma and choledochal cyst are excluded. Early diagnosis is often difficult because of its often-misleading appearance. CASE PRESENTATION: The authors report the case of a 54-year-old man, a known case of type 2 diabetes mellitus, who presented to our emergency department for acute abdominal pain that had evolved for 2 days. CLINICAL FINDINGS AND INVESTIGATIONS: On physical examination, the patient had a fever of up to 38.5°C, and the abdomen was distended and generally tight. The abdominal computerized tomography scan confirms the presence of free fluid. In addition, the thickness of the gallbladder wall had increased in contrast with a resolved gallbladder distention. Because exploration failed to demonstrate the cause of ascites, the authors performed a diagnostic paracentesis, which revealing ascites with a dark yellow-green color, which implied bile leakage. After initial resuscitation, an emergent exploratory laparotomy was performed. The authors found biliary peritonitis secondary to SPCBD. After peritoneal lavage, the perforation was repaired over a T-tube. The postoperative course was uneventful. Histological findings were consistent with ulcerous acalculous cholecystitis. The patient was disease-free after a 3-month follow-up. DISCUSSION: SPCBD is an uncommon condition in adults, and it is rarely reported in the literature. The pathogenesis of this disease is not clear and may be related to single or multiple factors. Usually, this disease is diagnosed in the postmortem. Early diagnosis and optimal surgical treatment are challenging. CONCLUSION: This present case highlighted the preoperative diagnostic difficulties of the SPCBD. Emergent surgical management should be instituted in the shortest time possible to reduce the high mortality.