Spontaneous rupture of choledochal cyst with pseudocyst formation—report on 2 cases and literature reviewSpontaneous rupture and subsequent bile peritonitis are rare complications of choledochal cysts. Of these complications, the formation of a biliary pseudocyst is an unusual form, and its preoperative diagnosis is difficult. In this report, we describe 2 cases showing spontaneous rupture with biliary pseudocyst formation. Inflammatory tissue surrounded those pseudocysts, one of which was adjacent to the perforation and the other formed in the transverse mesocolon apart from the biliary tract. These pseudocysts were removed by careful dissection, and single-stage cyst excision with biliary reconstruction was successfully performed in both cases.
Mucoepidermal carcinoma of the lung detected by positron emission tomography in a 5-year-old girlThe authors describe a rare case of mucoepidermal carcinoma of the lung incidentally identified in preoperative assessments for inguinal hernia repair in a 5-year-old girl. This patient was referred for right external inguinal hernia, and a 3.0-cm round-shaped lesion was found in the right lower lung field of a chest x-ray film. She had no respiratory tract complaints, but her serum carcinoembryonic antigen concentration was markedly elevated (21.2 ng/mL). Chest and abdominal computed tomography/magnetic resonance images could not determine the nature of the lesion, but 2-[18F]fluoro-2-deoxy-d-glucose positron emission tomography (FDG-PET) indicated a malignant tumor pattern.