Probiotics are defined as live microorganisms that confer a health benefit on the host when consumed in adequate amounts, such as Lactobacillus, Streptococcus, Enterococcus, Lactococcus, Bifidobacterium, Bacillus, Clostridium, Saccharomyces, Aspergillus, and Escherichia coli species. Previous studies have reported beneficial effects of probiotics on intestinal infections, including Clostridium difficile antibiotic-associated diarrhea, rotavirus infection, traveler's diarrhea, and other bacterial enteric diseases. Although few studies have reported serious adverse effects from probiotics, more evidence-based research is required for an in-depth evaluation of probiotics in medical science. (Intest Res 2011;9:171-178)
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Substantial development in equipment such as miniprobe endosonography and enteroscopy has made it possible to use endoscopic ultrasonography (EUS) to detect any part of the digestive tract. EUS plays a vital role in evaluating a lower intestinal malignancy, particularly rectal cancer, to determine whether the disease is localized (T1-2, N0) and appropriate for surgery or locally advanced (T any, N1-2) and would benefit from preoperative neoadjuvant chemoradiation. Moreover, follow-up by EUS may contribute to early recognition of focal tumor recurrence, particularly for lesions that cannot be detected by other imaging modalities. EUS is also an invaluable modality for diagnosing intestinal submucosal tumors, such as gastrointestinal stromal tumors, lipomas, lymphangiomas, leiomyomas, carcinoids, and others such as intestinal endometriosis. Although a definite diagnosis of a submucosal tumor is generally confirmed by cytology or histology results, EUS-guided fine needle aspiration or core biopsy is a fairly helpful practice. EUS is also useful for discriminating between Crohn's disease and ulcerative colitis as well as assessing disease severity. Moreover, it has emerged as a powerful imaging tool to manage perianorectal diseases. EUS also has the potential to be useful for intra-small intestinal ultrasonography for the diagnosis of small bowel diseases in the future. (Intest Res 2011;9:179-188)
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Background/Aims The benefits and risks of concomitant immunomodulators with infliximab maintenance therapy in patients with luminal Crohn's disease (CD) have not been adequately evaluated. We studied the influence of immunomodulator discontinuation in patients in remission with infliximab therapy through a restrospective case- control study. Methods: Medical records of 37 patients with luminal CD who received infliximab at four medical centers were retrospectively analyzed. We compared clinical and follow-up data of patients who were treated with infliximab alone with that of patients with combination therapy. Results: Among 37 patients, 31 (83.7%) were treated with infliximab plus azathioprine and six (16.2%) were treated with infliximab alone. Of the 31 patients receiving combination maintenance therapy, 26 (83.9%) were in complete remission after 12 months, as compared with five of six patients (83.3%) receiving infliximab alone. No significant difference was observed in remission rate between two groups (P=0.735). In total, 16.1% of patients in combination therapy and 16.7% in infliximab alone group reported side effects (P=1.000), but serious adverse events such as reactivation of tuberculosis were noted in only one patient in combination therapy group. Conclusions: Concomitant immunomodulators did not improve efficacy in patients with luminal CD who received scheduled infliximab maintenance. (Intest Res 2011;9:189-195)
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Sung Jae Shin, Suck-Ho Lee, Dong Il Park, Sung Noh Hong, Seong-Eun Kim, Dong-Hoon Yang, Sung Pil Hong, Bo In Lee, Hyun Soo Kim, Young-Ho Kim, Suk-Kyun Yang, Hyo Jong Kim, Se Hyung Kim, Multi-Society Task Force for the Guidelines for Colorectal Polyp Screening, Surveillance and Managem
Intest Res 2011;9(3):196-205. Published online December 30, 2011
Background/Aims There are no evidence-based, procedural guidelines to appropriately perform a colon polypectomy. Thus, we investigated the treatment modality for colon polypectomy in Korea, using a web-based e-mail survey. Methods: A questionnaire of preferred treatment modality for colon polypectomy was sent via e-mail to members of the Korean Association for the Study of Intestinal Diseases and primary care physicians who performed colonoscopies as a screening or surveillance program nationwide. Among 425 colonoscopists who were sent the e-mail, 263 replied. We analysed data from 252 colonoscopists who had performed colon polypectomies. Results: The stopping time for antiplatelet and anticoagulation therapy before a colon polypectomy had a tendency to increase and the restarting time for these drugs was delayed as polyp size increased. Colonoscopists preferred cold biopsy removal for polyps <5 mm in size and a hot snare polypectomy after injecting normal saline and epinephrine mixture for polyps ≥5 mm in size. More than half of colonoscopists preferred observation rather than additional procedures for adenomas with incomplete resection. In contrast, most colonoscopists recommended additional procedures, such as endoscopic mucosal resection, endoscopic submucosal dissection or surgery for an advanced adenoma with incomplete resection. The most preferred prophylactic treatment for immediate postpolypectomy bleeding washemoclipping. Conclusions: Various treatment modalities were used for a colon polypectomy because there are few guidelines for performing a colon polypectomy based on a critical review of the available data. Further well-designed, prospective studies are needed to develop evidence-based guidelines for colon polypectomy. (Intest Res 2011;9:196- 205)
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Background/Aims Colorectal cancer and thyroid cancer are common diseases with relatively higher survival rates compared with other cancers. The number of patients identified with colorectal cancer or thyroid cancer who develop multiple primary malignancy during long-term follow-up is increasing with advances in diagnostic techniques and treatment modalities. However, the association between colorectal cancer and thyroid cancer is uncertain, and few data have been reported in Korea. This study examined the association between thyroid cancer and colorectal neoplasm. Methods: We retrospectively investigated 363 patients who underwent a colonoscopy, among patients diagnosed with thyroid cancer between January 2004 and December 2008 at Samsung Medical Center. The control group was comprised of 2,494 patients who underwent screening colonoscopy for the first time within the study period at the center for health promotion at Samsung Medical Center between March 2004 and December 2005. Results: The detection rates in patients with thyroid cancer were 4.7% (17/363) for advanced adenomas and 2.8% (10/363) for colorectal cancer. In the control group, it was 3.2% (79/2,494) for advanced adenomas and 0.3% (7/2,494) for colorectal cancer. A multivariate analysis revealed that the presence of thyroid cancer had an odds ratio of 1.893 (95% confidence interval, 0.868-4.128, P=0.109) in favor of finding at least one advanced colorectal neoplasm. Conclusions: The results indicate that thyroid cancer is not associated with advanced colorectal neoplasm. Survivors of thyroid and colorectal cancer live longer and hence are at risk for second primary cancers. Therefore, further studies that prospectively evaluate the association between thyroid cancer and colorectal advanced neoplasm are needed. (Intest Res 2011;9:206-210)
Background/Aims The therapeutic strategy between endoscopic piecemeal mucosal resection (EPMR) and endoscopic submucosal dissection (ESD) for large laterally spreading tumors (LSTs) has not been clearly defined. The aim of this study was to compare the clinical outcomes between EPMR and ESD in patients with large LST. Methods: From July 2006 to September 2010, 106 patients who underwent endoscopic resection for large (>20 mm) LSTs were included in our retrospective analysis. Results: Baseline characteristics of the patients and tumors were not different between two groups except for location (EPMR-right colon, ESD-rectum). The en bloc resection rate and complete resection rate were significantly higher in the ESD group than those in the EPMR group (EPMR vs. ESD, 53.5% vs. 88.6, P<0.01, 45.1% vs. 71.4%, P=0.01, respectively). However, total procedure time was significantly shorter in the EPMR group (21.3 min vs. 44.4 min, P<0.01). Furthermore, the rates of complication including perforation and bleeding were significantly lower in the EPMR group than those in the ESD group (perforation, 1.4% vs. 11.4%, P=0.02; bleeding, 4.2% vs. 17.1%, P=0.03, respectively). During 19.9 months of follow-up, no significant difference was observed in terms of recurrence (1.5% vs. 3.2%). Non-granular, pseudo-depressed type (LST-PD) showed a significantly higher presence of adenocarcinoma and deeper submucosal invasion than other types of LSTs. Conclusions: The therapeutic strategy for choosing between EPMR and ESD for large LST lesions should be determined based on the macroscopic findings of their subtype. En bloc resection with ESD should be applied to LST-PDs due to their higher rate of submucosal invasion. (Intest Res 2011;9:211-216)
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Intest Res 2011;9(3):217-224. Published online December 30, 2011
Background/Aims With the growing volume of screening colonoscopies, the incidence of rectal carcinoids and the number of endoscopic resections for rectal carcinoids are also increasing. However, the prognosis including recurrence and metachronous lesions after endoscopic resection is unclear. Methods: The medical records of 255 patients who had undergone endoscopic resection for rectal carcinoids between October 1999 and April 2010 were retrospectively reviewed. Results: The number of males was 150 (58.8%), and the mean age was 54.1 years (range, 27-85 years). Mean tumor size was 6.9 mm. In total, 162 cases (63.5%) were treated with endoscopic mucosal resection and 93 (36.5%) were treated with endoscopic submucosal dissection. Although endoscopic complete resections were achieved in all cases, the histological examination showed 47 cases with a positive resection margin (18.4%) and three with lymphovascular invasion (1.2%). In the 54 patients with a free resection margin, who were followed for more than 12 months, abdominopelvic computed tomography and endoscopy did not show recurrence after a median of 30.5 and 36 months, respectively. Three patients with lymphovascular invasion did not show recurrence during follow-up period of 13, 30, and 37 months, respectively. Metachronous rectal carcinoids were detected in four patients at 23, 58, 61, and 89 months, respectively, after initial endoscopic resection, leading to a second endoscopic treatment. Conclusions: Small rectal carcinoids completely resected grossly and pathologically without lymphovascular invasion appear to have low probability of short-term recurrence. However, considering the slow growth rate of carcinoids, long-term follow-up for recurrence and metachronous carcinoids is required. (Intest Res 2011;9:217-224)
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Intest Res 2011;9(3):225-229. Published online December 30, 2011
Ulcerative colitis is associated with various extra-intestinal manifestations, including rheumatic, dermatologic, ophthalmologic, biliary, and hematologic manifestations. Cutaneous findings are common extra-intestinal manifestations of ulcerative colitis, occurring in 10-20% of patients. Cutaneous manifestations include erythema nodosum, pyoderma gangrenosum, aphthous stomatitis, and acute febrile neutrophilic dermatosis. Treatments for these cutaneous manifestations include corticosteroids, cyclosporine, tacrolimus, mycophenolate mofetil, azathioprine, and infliximab. A 48-year-old male presented with an acute exacerbation of ulcerative colitis associated with multiple skin lesions on his face, thumbs, thighs, and feet. The final impression was neutrophilic folliculitis, which is an early form of pyoderma gangrenosum. The patient's skin lesions and colitis both improved with corticosteroids. There are rare published case reports of ulcerative colitis exacerbations associated with pyoderma gangrenosum that initiated as neutrophilic folliculitis of the face. This case report includes a review of the literature. (Intest Res 2011;9:225-229)
Ischemic colitis has a relatively high prevalence in the elderly population with underlying vascular disorders such as hypertension and usually occurs on the left side of the colon. However, ischemic colitis also rarely occurs in healthy young adults with no risk factors. Herbal medication use is increasing, particularly for weight loss. Ischemic colitis associated with herbal medication use has been rarely reported. Here, we describe a case of right-sided ischemic colitis in a young woman that was potentially linked to the use of herbal medication. An 18-year-old woman was admitted to our emergency department with abdominal pain and bloody diarrhea for 1 day. Her medical history was unremarkable for bowel ischemia risk factors. However, she had taken herbal medication for weight loss for the past 2 weeks. Abdominopelvic CT showed diffuse wall thickening with decreased mucosal enhancement from the ascending to the transverse colon. A colonoscopic biopsy specimen showed coagulative necrosis of the mucosa, hemorrhage, and inflammatory cell infiltration. The abdominopelvic CT, colonoscopy, and biopsy findings were compatible with ischemic colitis. Her abdominal pain and bloody diarrhea improved completely with conservative management, and she was advised to discontinue the use of herbal medications. (Intest Res 2011;9:230-233)
Pneumatosis cystoides intestinalis (PCI) is a rare disease characterized by the presence of intramural gas-filled cysts in the gastrointestinal wall. This disease has been documented in patients with various medical conditions such as gastrointestinal disease, chronic obstructive lung disease, sepsis, and autoimmune disorders. A 49-year-old woman, who was undergoing immumosuppressant therapy due to polymyositis, developed PCI. She experienced a gradual onset of abdominal distension. A simple abdominal radiograph revealed small, round air shadows involving the small bowel, and abdominal computed tomography showed intraluminal air bubbles at the jejunal loop with free air in the peritoneum. Treatment with doxycycline effectively relieved the clinical symptoms and reduced the intramural gas. (Intest Res 2011;9:234-237)
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Intest Res 2011;9(3):238-242. Published online December 30, 2011
Cronkhite-Canada syndrome (CCS) is a rare, non-familial hamartomatous polyposis syndrome characterized by multiple polyps in the entire gastrointestinal tract, nail dystrophy, skin pigmentation, and systemic alopecia. The clinical symptoms of this syndrome include diarrhea, abdominal pain, and alopecia often accompanied by taste disturbances, hypoalbuminemia, recurrent infections, nutritional absorption disturbances, heart failure, and gastrointestinal bleeding. We report a patient with CCS who was admitted complaining of hematochezia, melena, and a 1 month history of diarrhea, nail changes, taste disturbances, and alopecia. Upper endoscopy, colonoscopy, and capsule endoscopy were performed and showed numerous polyps in the stomach, small intestine, and large intestine. Histological sections of these polyps showed edematous stroma and cystically dilated foveolar epithelium, which was consistent with CCS. We diagnosed CCS based on the clinical symptoms and the histological findings of the polyps found via endoscopy. We report on this case and review this syndrome. (Intest Res 2011;9:238-242)
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