An unusual presentation of chordoma as a pyloric ring submucosal tumor: The first case report of a primary gastrointestinal lesion in humans.

Introduction And Importance: Chordomas are rare malignant bone neoplasms that are presumed to arise from chordal remnants in the fetal stage and typically occur along the axial skeleton. The extra-skeletal chordomas reported to date include soft tissue of the extremities and nasopharynx. Chordoma arising from the gastrointestinal wall has not been previously described.

[A endoscopic treatment of penetration of the colon by an ingested fish bone].

An 81-year-old woman was admitted complaining of left lower abdominal pain. Computed tomography on admission revealed foreign a body penetrating descending colon and free air. We extracted the foreign body endoscopically.

[Probable amebic brain abscess in a homosexual man with an Entamoeba histolytica liver abscess].

A 51-year-old Japanese-Brazilian homosexual man was admitted to a hospital because of fever, headache and right epigastralgia. He had been homosexual for 20 years. An abdominal CT revealed a liver abscess and microscopic examination of the pus of the drainage revealed cystic forms of Entamoeba histolytica.

Clinical and genetic analysis of noncancerous and cancerous biliary epithelium in patients with pancreaticobiliary maljunction.

We analyzed clinical features and genetic alterations in the noncancerous and cancerous biliary lesions obtained from pancreaticobiliary maljunction (PBM) patients. Gallbladder (GB) and bile duct (BD) lesions were obtained surgically from 36 patients with PBM, and polymerase chain reaction (PCR) methods were used to examine for mutations of the K-ras gene and the p53 gene and for microsatellite instability (MSI). The 36 cases were clinically classified into two types according to whether extrahepatic bile duct dilatation was present: a congenital choledochal dilatation (CCD) group (n = 20) and a noncongenital choledochal dilatation (NCCD) group (n = 16).