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Introduction Incidence of duplicated urinary system is 0.7–4% of population, mostly are females and often diagnosed in childhood. Various symptoms meet difficulties to be diagnosed. Case presentation A 20-years-old woman admitted to hospital with fever, fatigue, nausea, loss of appetite, colic epigastric pain and right flank pain since 5 days before admission, normal pattern of urination with dribbling and recurrent urinary tract infection. Abdominal ultrasonography showed complicated cystic tumor upper pole of right kidney. Abdominal computed tomography with contrast showed enlargement right kidney with duplicated collecting system and duplicated ureter obstruction (severe hydroureteronephrosis right upper pole moiety) right kidney and ectopic ureter insertion of upper pole moiety between urethra and anterior vagina, no insertion to bladder, seemed to be dead end. Discussion Various symptoms of duplicated collecting system are asymptomatic, flank pain, abdominal pain, urinary incontinence, and recurrent UTI, often accompanied by abnormality of upper pole or lower pole or both. Abnormality of upper renal moiety usually has ectopic ureter as in Weigert-Meyer principle. Insertion into infrasphincter usually manifests as urinary dribbling or urinary incontinence or normal urination with few volume leakage or spotting incontinence, whereas suprasphincter usually manifests as recurrent UTI without incontinence. There are imaging modalities for diagnosing these anomalies, including USG and abdominal CT with contrast. Conclusion Understanding embryology, symptoms, imaging modality, and complications are necessary to consider this diagnosis for early detection. Ultrasonography and abdominal CT with contrast can be used to diagnose the urinary tract anomalies, especially duplicated urinary systems with ectopic ureter insertion.

Introduction Giant duodenal diverticulum is a very rare case. There are only few cases reported. We reported a case of giant duodenal diverticulum with biliary obstruction caused by mucinous carcinoma of distal common bile duct (CBD), that mimicking Lemmel syndrome. Case presentation A 68-years-old man admitted to hospital with recurrent epigastric pain, jaundice and fever. Magnetic resonance cholangiopancreatography showed dilated intrahepatic and extrahepatic biliary tree, dilated gallbladder and cystic mass in pancreatic head that pushed the pancreatic duct ventrally. Emergency laparotomy was performed. Distended edematous gallbladder with necrotic spot, dilated of CBD and compressible bulging of the pancreatic head were found. Duodenotomy in 2nd-3rd part was made and found a giant duodenal diverticulum filled with food and mucus. Tight adhesion to the ampula of Vater, common bile duct, and pancreas due to fibrosis, met difficulties in dissection with a lot of bleeding, hence the diverticulum was not removed. Gastrojejunostomy, cholecystectomy and choledocho-duodenostomy were also done. Pathologic examination of CBD mucus was accordance with mucinous carcinoma. Discussion Periampullary duodenal diverticulum can cause obstructive jaundice, known as Lemmel syndrome. This case was different as the giant duodenal diverticulum located in the 3rd part filled with food and mucin that compressed both distal CBD and pancreatic duct. The cause of obstructive jaundice could be fibrotic tissue in distal CBD and mucinous carcinoma. Conclusion Giant duodenal diverticulum with bile obstruction is very rare and challenging in diagnosis and treatment. The other cause of obstruction should be considered such as mucinous carcinoma of distal CBD.

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