Usefulness of Gastroscope in Patients with Incomplete Colonoscopy

BACKGROUND/AIMS: Conventional colonoscopy is limited in some patients with several causes, such as fixed angulation, extensive loop or adhesion. Therefore, small-caliber scopes are considered alternatives to unsuccessful conventional colonoscopy. The aim of this study is to evaluate the usefulness of gastroscope in patients with unsuccessful colonoscopy. METHODS: From May 2008 to April 2009, a total of 2,548 colonoscopies were performed in Wonkwang University Hospital. The gastroscope was used subsequently when conventional colonoscopy failed. RESULTS: There were 27 cases (1.06%) of unsuccessful colonoscopy. The causes of failure were assessed as fixed angulation of the sigmoid colon (59.2%, 16/27), excessive looping (14.8%, 4/27), stricture (14.8%, 4/27), sigmoid diverticulosis (7.4%, 2/27), and adhesion of transverse colon (3.7%, 1/27). The average time of intubation to cecum with the gastroscope was 7 minutes and 28 seconds (range, 2 to 20 minutes). With the gastroscope, 77.8% (21/27) were intubated to the cecum. The pain score of gastroscope was reduced, as compared with that of conventional colonoscopy (4.95 vs. 5.94, P<0.001). CONCLUSIONS: Gastroscope would be a useful alternative tool in patients with unsuccessful colonoscopy.

A Case of Angiosarcoma in Rectum

Angiosarcoma is a malignant vascular neoplasm that usually involves the skin or soft tissues. A primary rectal angiosarcoma is exceedingly rare. A 77-year-old female was admitted to the hospital for evaluation of constipation and hematochezia. The patient had a history of uterine cervix carcinoma which was treated with surgery and radiation therapy. A colonoscopy revealed a friable, ulceroinfiltrative tumor with multiple hyperemic mucosae in the rectum. Microscopically, the tumor exhibited vasoformative growth with nuclear atypism and numerous mitoses. The tumor cells were strongly positive for CD31, CD34, and Factor VIII. We report a case of rectal angiosarcoma that developed after radiation therapy.

A Case of Angiosarcoma in Rectum

Angiosarcoma is a malignant vascular neoplasm that usually involves the skin or soft tissues. A primary rectal angiosarcoma is exceedingly rare. A 77-year-old female was admitted to the hospital for evaluation of constipation and hematochezia. The patient had a history of uterine cervix carcinoma which was treated with surgery and radiation therapy. A colonoscopy revealed a friable, ulceroinfiltrative tumor with multiple hyperemic mucosae in the rectum. Microscopically, the tumor exhibited vasoformative growth with nuclear atypism and numerous mitoses. The tumor cells were strongly positive for CD31, CD34, and Factor VIII. We report a case of rectal angiosarcoma that developed after radiation therapy.

Metronidazole-induced encephalopathy in a patient with liver cirrhosis / 대한간학회지

Encephalopathy is a disorder characterized by altered brain function, which can be attributed to various causes. Encephalopathy associated with metronidazole administration occurs rarely and depends on the cumulative metronidazole dose, and most patients with this condition recover rapidly after discontinuation of therapy. Because metronidazole is metabolized in the liver and can be transported by the cerebrospinal fluid and cross the blood-brain barrier, it may induce encephalopathy even at a low cumulative dose in patients with hepatic dysfunction. We experienced a patient who showed ataxic gait and dysarthric speech after receiving metronidazole for the treatment of hepatic encephalopathy that was not controlled by the administration of lactulose. The patient was diagnosed as metronidazole-induced encephalopathy, and stopping drug administration resulted in a complete recovery from encephalopathy. This case shows that caution should be exercised when administering metronidazole because even a low dose can induce encephalopathy in patients with liver cirrhosis.

A Tuberculous Peritonitis Presenting as Submucosal Tumors

Tuberculous peritonitis is not an uncommon disease, but the diagnosis is often missed and delayed because of the variability of disease presentation and non-specific clinical manifestations. In this report, we discuss a rare case of tuberculous peritonitis which presented as a submucosal mass in the colon. A 61-year-old woman registered at our hospital for a physical check-up. She had a weight loss of 3 kg over the past 6 months. The colonoscopic findings showed submucosal lesions (4 and 6 mm in size, yellow in color, and hard) which were suspected to be a carcinoid tumor. However, an abdomen-pelvic CT scan and laparoscopic findings suggested peritoneal tuberculosis. The result of laparoscopic biopsies was chronic granulomatous inflammation without caseous necrosis. After the standard anti-tuberculosis medications for 6 months, the previous lesions on the CT scan had resolved.

Iron chelator inducesMIP-3alpha/CCL20 in human intestinal epithelial cells: implication for triggeringmucosal adaptive immunity

A previous report by this laboratory demonstrated that bacterial iron chelator (siderophore) triggers inflammatory signals, including the production of CXC chemokine IL-8, in human intestinal epithelial cells (IECs). Microarray-based gene expression profiling revealed that iron chelator also induces macrophage inflammatory protein 3 alpha (MIP-3alpha)/ CC chemokine-ligand 20 (CCL20). As CCL20 is chemotactic for the cells involved in host adaptive immunity, this suggests that iron chelator may stimulate IECs to have the capacity to link mucosal innate and adaptive immunity. The basal medium from iron chelator deferoxamine (DFO)-treated HT-29 monolayers was as chemotactic as recombinant human CCL20 at equivalent concentrations to attract CCR6+ cells. The increase of CCL20 protein secretion appeared to correspond to that of CCL20 mRNA levels, as determined by real-time quantitative RT-PCR. The efficacy of DFO at inducing CCL20 mRNA was also observed in human PBMCs and in THP-1 cells, but not in human umbilical vein endothelial cells. Interestingly, unlike other proinflammatory cytokines, such as TNF-alpha and IL-1beta, a time-dependent experiment revealed that DFO slowly induces CCL20, suggesting a novel mechanism of action. A pharmacologic study also revealed that multiple signaling pathways are differentially involved in CCL20 production by DFO, while some of those pathways are not involved in TNF-alpha-induced CCL20 production. Collectively, these results demonstrate that, in addition to some bacterial products known to induce host adaptive immune responses, direct chelation of host iron by infected bacteria may also contribute to the initiation of host adaptive immunity in the intestinal mucosa.

A Case of Nephrotic Syndrome associated with Chylothorax and Chyloascites in Adult / 대한신장학회잡지

Chylothorax charaterized by milky, opalescent fluid in the pleural space has variety causes, including trauma, lymphoma and carcinoma. The nephrotic syndrome is not recognized as a cause of chylothorax. We report a case of nephrotic syndrome and chylothorax that was secondary to the transdiaphragmatic movement of chyloascites and was treated with chest tube drainage and total parenteral nutrition.

A case of Sheehan's syndrome presented by recurrent ventricular tachycardia / 대한내과학회지

Electrocardiographic abnormalities commonly associated with hypopituitarism are low QRS voltage, ST-segment depression, inverted T waves and a prolonged QT interval. Although the mechanism remains unclear, glucocorticoid therapy, an intracelluar-extracellular electrolyte imbalance of myocytes, and histopathological changes in the myocardium are thought to play a role in this disorder. We discribe a 64 year old woman with recurrent ventricular tachycardia associated with QT prolongation in Sheehan's syndrome. Ventricualr tachycardia was treated by lidocain and direct current cardioversion. Sheehan's syndrome was confirmed by past history, anterior pituirary stimulation test and brain MRI showed empty sella. After hormone replacement treatment, inverted T waves and prolonged QT interval was normalized and ventricular tachycardia did not recur.