A Case of Long-Term Survival with Recurrent Liver Metastases from Gastric Cancer Treated with Nivolumab

Introduction

Improvements in overall survival from advanced gastric cancer have recently been reported with nivolumab. However, few reports have described long-term survival after discontinuing treatment.

Case Presentation

A 67-year-old man diagnosed with advanced gastric cancer and abdominal aortic aneurysm initially underwent distal gastrectomy with D2 dissection. Histological examination revealed tub2 and T2N1M0 stage IIA. One month later, endovascular aneurysm repair was performed. Six weeks after gastrectomy, adjuvant chemotherapy with S-1 was started. Six months later, liver metastases were identified and liver segments S1 and S7 were resected. S-1 and oxaliplatin were added postoperatively, but multiple liver metastases recurred. Paclitaxel and ramucirumab, irinotecan, and docetaxel were administered. Liver metastases showed a temporary reduction in size, then enlarged again. Nivolumab was therefore administered and the liver metastases showed a significant reduction in size. The interval between doses gradually increased due to persistent general fatigue. At 28 months after starting nivolumab therapy, bronchitis and adrenal insufficiency appeared, so treatment was discontinued. As of 3.5 years after cessation of nivolumab immunotherapy, tumor regression continued to be maintained. The patient remains alive as of 8 years after recurrence of liver metastases.

Conclusion

We encountered a case in which the patient received nivolumab therapy for recurrent liver metastases from gastric cancer and survived long term after discontinuing treatment.

Mucinous cystadenoma of the pancreas associated with pancreatic pseudocyst

Mucinous cystadenoma of the pancreas is considered as a premalignant lesion, and resection is recommended. The majority of pancreatic cystic lesions are pancreatic pseudocysts, so differentiation between mucinous cystadenoma and pseudocyst is frequently required. We report a rare case of mucinous cystadenoma of the pancreas coexisting with pseudocyst. A 43-year-old woman presented with abdominal pain. Imaging examinations showed a large cystic lesion in the tail of the pancreas, and distal pancreatectomy and splenectomy were performed. Pathological examination revealed that the majority of the cystic wall comprised thick collagen fibrous connective tissue, while part of the cystic wall represented a single layer of columnar, mucin-producing epithelium without atypia. Those findings suggested mucinous cystadenoma with an inflammatory pseudocyst. The mixture of mucinous cystadenoma and pseudocyst within the same cystic lesion appears to be very rare. Complete resection of the cystic lesion seems to allow an excellent prognosis.

Adsorptive Granulocyte and Monocyte Apheresis Is Effective in Ulcerative Colitis Patients Both with and without Concomitant Prednisolone

Background

The number of ulcerative colitis (UC) patients is increasing in Japan and other countries. Selective depletion of myeloid lineage leucocytes by adsorptive granulocyte and monocyte apheresis (GMA) with an Adacolumn (JIMRO, Takasaki, Japan) was introduced as a nonpharmacologic treatment strategy in UC patients in 2000. GMA has been reported to be effective in clinical trials; however, the effect of concomitant prednisolone (PSL) on GMA needs to be clarified.

Methods

Thirty-nine patients with active UC were treated with GMA at our institute between June 2009 and September 2018. All patients received GMA therapy once or twice a week with the Adacolumn. Conventional medication was to be continued during the whole GMA treatment course. The clinical response was retrospectively evaluated.

Results

According to the partial Mayo score, remission was 33.3%, significant efficacy 25.6%, effective 25.6%, and no response 15.4%. The average partial Mayo score was 6.2 ± 1.4 at entry and significantly declined to 1.8 ± 1.8 after GMA sessions (p < 0.0001). The average number of bowel movements was 9.5 ± 5.6 at entry and significantly declined to 3.0 ± 2.8 after GMA sessions (p < 0.0001). In a comparison between the group treated with concomitant PSL and the group without PSL, the change in partial Mayo score or the number of bowel movements from entry to after GMA sessions was not significantly different. Among 24 patients treated by GMA with concomitant PSL, 75% (18/24) became steroid free.

Conclusions

The effect of GMA with concomitant PSL and that of GMA without PSL were not different, and GMA was effective irrespective of PSL administration. The present study showed that GMA had efficacy and led many UC patients treated by PSL to be steroid free with no safety concern in the real world, although there is the possibility of recruitment bias due to the retrospective nature of the study.

Effectiveness and safety of a new regimen of polyethylene glycol plus ascorbic acid for same-day bowel cleansing in constipated patients

BACKGROUND AND STUDY AIMS

In an exploratory study we compared a new regimen of low-volume polyethylene glycol plus ascorbic acid (PEG-Asc) with the standard regimen for same-day bowel cleansing in constipated patients.

PATIENTS AND METHODS

Between January and June 2015 we studied consecutive patients with constipation (Rome III constipation criteria) scheduled for colonoscopy. The initial group received the standard regimen of PEG-Asc. The subsequent group received the new regimen. The new regimen involved ingestion of 10 mL of sodium picosulfate and 50g of magnesium citrate dissolved in 0.2 L of water followed by 0.2 L of PEG-Asc +0.2 L of water given 6 or 7 times over 3 hours. Bowel cleansing was prospectively evaluated using the Boston bowel preparation scale (BBPS). Bowel cleansing, adenoma detection rates and adverse events were reviewed using electronic medical records and endoscopic filing system.

RESULTS

Sixty-two patients used the standard regimen and sixty used the new regimen. The basic characteristics of the two groups were similar. The mean volume of PEG-Asc and total liquid intake was less with the new regimen compared to the standard regimen (1.3 L vs. 2.0 L, P<0.001; 2.6 L vs. 3.0 L, P<0.001). The proportion of patients with a BBPS score ≥ 6 was significantly greater with the new than the standard regimen (93% vs. 76%, P=0.008). Nausea and/or vomiting was also significantly less frequent than with the standard regimen (5% vs. 16%, P=0.046).

CONCLUSIONS

The new regimen of PEG-Asc gave improved same-day bowel cleansing for colonoscopy in constipated patients.

Number of Lymph Nodes in Rectal Cancer is Correlated with Response to Preoperative Chemoradiotherapy but is not Associated with Patient Survival

BACKGROUND/AIMS

We aimed to clarify the oncological significance of the number of lymph nodes in rectal cancers treated with preoperative chemoradiotherapy.

METHODOLOGY

We studied 126 curatively operated patients with clinical T3-T4 and M0 rectal cancers. The number of lymph nodes and clinicopathological features were compared between the patients treated with surgery alone (OP group, n = 45) and those treated with preoperative chemoradiotherapy (50-50.4 Gy in 25-28 fractions with tegafur-uracil and leucovorin, CRT group, n = 81). Factors influencing lymph node count and its prognostic significance were analyzed.

RESULTS

The CRT group had significantly fewer lymph nodes than the OP group (12.4 vs. 21.1, P < 0.0001). High histological regression of rectal lesions was significantly correlated with decreased lymph node count in the CRT group. In the OP group, the 5-year cancer-specific survival rate of the patients with 12 or more lymph nodes was significantly better than those with fewer than 12 lymph nodes (75.1% vs. 33.3%, P = 0.02); in the CRT group, on the other hand, these survival rates did not differ (84.5% vs. 77.5%, P = 0.6).

CONCLUSIONS

The number of lymph nodes in rectal cancer was correlated with the response of primary rectal lesions to chemoradiotherapy, and was not associated with patient survival.

Usefulness of laparoscopic subtotal cholecystectomy with operative cholangiography for severe cholecystitis

Purpose

Cholecystectomy can become hazardous when inflammation develops, leading to anatomical changes in Calot’s triangle. We attempted to study the safety and efficacy of laparoscopic subtotal cholecystectomy (LSC) to decrease the incidence of complications and the rate of conversion to open surgery.

Methods

Patients who underwent LSC between January 2005 and December 2008 were evaluated retrospectively. The operations were performed laparoscopically irrespective of the grade of inflammation estimated preoperatively. However, patients with severe inflammation of the gallbladder underwent LSC involving resection of the anterior wall of the gallbladder, removal of all stones and placement of an infrahepatic drainage tube. To prevent intraoperative complications, including bile duct injury, intraoperative cholangiography was performed.

Results

LSC was performed in 26 elective procedures among 26 patients (eight females, 18 males). The median patient age was 69 years (range 43–82 years). The median operative time was 125 min (range 60–215 min) and the median postoperative inpatient stay was 6 days (range 3–21 days). Cholangiography was performed during surgery in 24 patients. One patient underwent postoperative endoscopic sphincterotomy for a retained common bile duct stone that was found on cholangiography during surgery. Neither complications nor conversion to open surgery were encountered in this study.

Conclusions

LSC with the aid of intraoperative cholangiography is a safe and effective treatment for severe cholecystitis.

[Usefulness of CTCs in tumor drainage vein blood as a biomarker for prognosis in colorectal cancer patients with Dukes' stage B and C]

We aimed to clarify the clinical significance of circulating tumor cells (CTCs) in the tumor drainage vein blood of colorectal cancer(CRC) patients with Dukes' stage B and C. This study included 111 patients with Dukes' stage B and 86 patients with Dukes' stage C. We selected multiple genetic markers, including the cancer-associated marker (CEA), epithelial markers(CK19 and CK20), and cancer stem-like cell marker(CD133), and the mRNA levels of these genes were detected by quantitative real-time reverse transcription-polymerase chain reaction assays. In Kaplan-Meier survival curve analysis, overall survival(OS) and disease-free survival(DFS) of Dukes' stage B and C patients who were positive for CEA, CK19, CK20, and/or CD133 (CEA/CK/CD133) were significantly worse than that in patients who were negative for these markers. By Cox progression analysis, it was demonstrated that CEA/CK/CD133 mRNA in tumor drainage vein blood was an independent prognostic factor for OS and DFS in these patients. These results suggest that CEA/CK/CD133 mRNA detection in tumor drainage vein blood is a useful tool for the determination of high-risk CRC patients with Dukes' stage B and C who are in need of postoperative adjuvant therapy.

Colonoscopic enema as rescue for inadequate bowel preparation before colonoscopy: a prospective, observational study

AIM

Colonoscopy may need to be rescheduled because of inadequate bowel preparation. We evaluated the effectiveness of colonoscopic enema as rescue for an inadequate 1-day bowel preparation before colonoscopy.

METHOD

Patients referred for afternoon colonoscopy were prospectively enrolled in the study during a 1-year period. Patients took bowel preparation (polyethylene glycol) solution on the morning of the endoscopy. If during colonoscopy the bowel preparation was poor, an enema of polyethylene glycol solution (500 ml) was instilled into the colon at the level of the hepatic flexure via the biopsy channel of the colonoscope which was then removed. The patient was allowed to recover from the propofol sedation and used the bathroom to evacuate the enema. The colonoscope was then introduced and the examination continued.

RESULTS

Of 504 patients undergoing colonoscopy, 26 (4.9%) received an enema. The median age was 59 (29-79) years and 19 (73%) were female. A subsequent successful colonoscopy was achieved in 25/26 (96%). There were no complications. The mean time spent for the entire colonoscopy from the initial preparation to the end of the examination including the enema was 7.6± 1.1h (5.4 h preparation, 0.2h first colonoscopy+enema, 0.66h waiting in the lavatory, 0.33h second colonoscopy and 1 h for recovery).

CONCLUSION

Colonoscopic enema was highly successful as rescue for patients with inadequate bowel preparation and avoided postponement of the procedure.

Neonatal iliopsoas abscess

Iliopsoas abscess (IPA) is rare in children, particularly in neonates. A male neonate was born at 38 weeks of gestation with a weight of 2915 g. On day 22 after birth, his family noticed that his right thigh was swollen. Abdominal computed tomography showed a mass extending to the right iliopsoas from the right thigh with thick septa. Puncture to the right groin yielded purulent fluid, and so a diagnosis of abscess was made. The puncture was followed by surgical drainage through a small inguinal incision, and the abscess cavity was irrigated thoroughly using normal saline. Culture of abscess fluid was positive for Streptococcus pneumoniae, so intravenous ABPC infusion was continued. The postoperative magnetic resonance imaging indicate that the IPA was derived from arthritis of the hip, and the patients received Riemenbügel for the incomplete hip dislocation. He is doing well at 2 years of age.

Invasive colorectal cancer within 5 years of negative colonoscopy in a Japanese population

AIM

Colonoscopy provides imperfect protection against colorectal cancer (CRC). In an attempt to improve cancer detection we evaluated the clinical features of invasive CRC detected within 5 years of a negative colonoscopy.

METHOD

The details of colonoscopies performed in a rural hospital in Japan were prospectively recorded at the time of the examination. The patients were followed over 5 years for the subsequent occurrence of cancer.

RESULTS

In a 5-year period, 10148 patients underwent colonoscopy and 202 without previous colonoscopy were diagnosed with invasive CRC. Of 3212 patients with a colonoscopy negative for cancer, nine developed invasive cancer within 5 years. The ratios for invasive CRC detected without/with previous colonoscopy were 60:1 in the rectum, 54:1 in the sigmoid colon, 15:1 in the descending colon, 28:0 in the transverse colon, 31:5 in the ascending colon and 14:1 in the caecum (P=0.041). The ratio between left- and right-sided colonic cancer was also significantly different (129:3 and 45:6, P=0.0078). Six (67%) of the invasive CRCs were in the ascending colon or caecum. Five of six patients with invasive CRC in the ascending colon and caecum had right-sided small adenomas at prior colonoscopy.

CONCLUSION

The majority of early/missed CRCs were right-sided and associated with prior right-sided colonic adenomas. Repeated colonoscopy of patients with right-sided adenomas at a shorter surveillance interval deserves consideration.

Endoscopic decompression of benign large bowel obstruction using a transanal drainage tube

AIM

Endoscopic decompression of malignant colorectal obstruction is often dealt with using expandable metallic stents. Endoscopic decompression of benign large bowel obstruction is more difficult. We report the technique and outcome of transanal endoscopic decompression for benign large bowel obstruction.

METHOD

From January 2001 to June 2010, endoscopic decompression using a transanal drainage tube placement was attempted in consecutive patients with benign large bowel obstruction. The clinical features, technical success, complications, treatment after the tube placement and clinical success were retrospectively evaluated.

RESULTS

There were 13 patients (seven males, age 47-87, mean 69 years). The sites of obstruction were transverse colon [5 (38%)], sigmoid colon [3 (23%)], ileocecal valve [2 (15%)], splenic flexure [1 (8%)], descending colon [1 (8%)] and rectum [1 (8%)]. The most common cause of obstruction was anastomotic stricture [9 (69%)]. In 12 (92%) patients transanal decompression was technically successful with one perforation. An overtube, the reinsertion of colonoscope along the decompression tube, or the use of a small-diameter endoscope was required for the tube placement in seven (54%). In seven (54%) patients tube placement alone resulted in relief of bowel obstruction without operation.

CONCLUSION

Endoscopic decompression using a transanal drainage tube is effective for the management of benign large bowel obstruction.

Tumor location is a prognostic factor in poorly differentiated adenocarcinoma, mucinous adenocarcinoma, and signet-ring cell carcinoma of the colon

PURPOSE

Cancers which arise in the proximal and distal colon are suggested to be different clinically, pathologically, and genetically. The aim of this study is to clarify whether clinical behavior of colonic poorly differentiated adenocarcinoma, mucinous adenocarcinoma, and signet-cell carcinoma (Por/Muc/Sig cancers), minor and aggressive subpopulation in colonic cancers, differs in accordance with the tumor location.

METHODS

A total of 3,175 patients with curatively resected colonic cancers were studied. Clinical and pathological features were compared between Por/Muc/Sig cancers and well or moderately differentiated adenocarcinomas (Wel/Mod cancers) and between proximal and distal cancers in each histologic type.

RESULTS

Por/Muc/Sig cancers (n = 213) were more advanced in the TNM stage and showed worse disease-specific survival than Wel/Mod cancers (n = 2,692). In Por/Muc/Sig cancers, but not in Wel/Mod cancers, proximal cancers showed significantly better disease-specific survival than distal cancers (88.9% vs. 76.5%, p = 0.0234), and a multivariate analysis showed that proximal tumor location was an independent predictor of fair prognosis (hazard ratio (HR), 0.458; 95% confidence interval (CI), 0.218-0.961; p = 0.0390). In addition, female gender also was an independent predictor of fair prognosis in Por/Muc/Sig cancers (HR, 0.373; 95% CI, 0.151-0.922) and not in Wel/Mod cancers.

CONCLUSIONS

Proximal Por/Muc/Sig cancers were suggested to be a distinct subpopulation with a favorable oncologic outcome. Tumor location and gender might be helpful in the risk stratification after curative surgery for Por/Muc/Sig cancers.

Prognostic significance of PDCD4 expression and association with microRNA-21 in each Dukes' stage of colorectal cancer patients

Down-regulation of the novel tumor suppressor gene programmed cell death 4 (PDCD4) was demonstrated in several types of cancer and regulation by micro-RNA is gaining attention. However, the clinical significance of the PDCD4 gene in colorectal cancer (CRC) patients still remains unclear. In particular, the significance of PDCD4 mRNA expression in each tumor stage has not been reported. In this study, we evaluated the prognostic value of PDCD4 expression in each Dukes' stage of CRC patients. Furthermore, relationships between the PDCD4 mRNA and microRNA-21 (miR-21) were evaluated. Tumor tissues and normal adjacent tumor tissues from 326 patients with CRC (Dukes' stage A, 44 cases; Dukes' B, 118 cases; Dukes' C, 100 cases; Dukes' D, 64 cases) were examined. The PDCD4 mRNA was investigated by the quantitative real-time RT-PCR method and miR-21 was examined by TaqMan microRNA assays. The overall survival rates (OS) and disease-free survival rates (DFS) of low PDCD4 patients were significantly worse than those of patients with high expression. In analysis of each tumor stage, OS and DFS of patients with low PDCD4 levels were significantly worse than those with high PDCD4 levels in Dukes' stage B and C. In Dukes' stage D, patients with low PDCD4 expression showed a significant worse OS compared to those of patients with high PDCD4 expression. In contrast, no significant differences were seen between these groups in patients with Dukes' stage A. PDCD4 expression in CRC tissues was an independent prognostic factor in Dukes' stage B, C and D. Significant inverse correlations were demonstrated between PDCD4 and miR-21. The reduced PDCD4 mRNA expression is associated with poor prognosis in CRC patients with Dukes' stage B, C and D. Furthermore, PDCD4 mRNA levels were negatively regulated by miR-21in each tumor stage of CRC.

Prognostic significance of CTCs and CSCs of tumor drainage vein blood in Dukes' stage B and C colorectal cancer patients

The clinical significance of circulating tumor cells (CTCs) including cancer stem cells (CSCs) (CTC/CSC) in the tumor drainage vein blood of patients with colorectal cancer (CRC) is unclear. In this study, we investigated the prognostic value of CTC/CSC that express carcinoembryonic antigen (CEA) cytokeratin 19 (CK19), CK20 and/or CD133 (CEA/CK/CD133) mRNA in the tumor drainage blood of CRC patients with Dukes' stage B and C. We examined tumor drainage blood from 197 patients with Dukes' stage B and C CRC. CTCs that expressed CEA, CK19, CK20 and CD133 mRNA were detected using the quantitative real-time reverse transcription-polymerase chain reaction (RT-PCR) assay. Each mRNA level was normalized with GAPDH mRNA levels. In the relationship between the expression of CEA/CK/CD133 in the tumor drainage blood and clinicopathological factors, a significant correlation was observed between CEA/CK/CD133 expression and Dukes' stage (p<0.041). In CRC patients with Dukes' stage B and C, disease-free (DFS) and overall survival (OS) of patients with CEA/CK/CD133 positive in the tumor drainage blood were significantly worse than that of marker gene negative patients. In contrast, in patients with Dukes' stage A, no significant differences were shown between these groups. By Cox progression analysis, it was shown that CEA/CK/CD133 mRNA in tumor drainage blood was an independent prognostic factor for DFS and OS in patients with Dukes' stage B and C. These results suggest that detecting CEA/CK/CD133 mRNA in tumor drainage blood by the real-time RT-PCR method would have a prognostic value in CRC patients with Dukes' stage B and C.

Acute respiratory distress syndrome after gastrointestinal surgery

BACKGROUND/AIMS

Acute respiratory distress syndrome (ARDS) occasionally occurs after gastrointestinal surgery involving severe inflammation such as diffuse peritonitis. Management of this condition has been difficult and effective therapies have not yet been established. In the present study the management for ARDS after gastrointestinal surgery was evaluated.

METHODOLOGY

A total of 15 patients developed ARDS after gastrointestinal operations performed in our institution. The mean patient age was 75.4±11.1 years. Onset of ARDS occurred ≤24 hours postoperatively in 12 patients and 3- 11 days postoperatively in 3 patients. Treatment for ARDS comprised continuous hemodiafiltration (CHDF), high-dose glucocorticoid therapy or administration of a neutrophil elastase inhibitor (sivelestat).

RESULTS

Four patients died 3-45 days after onset of ARDS (mortality rate, 26.6%). CHDF was performed in 12 patients, 8 patients received highdose glucocorticoid therapy and 11 patients received sivelestat. No differences in severity scores and clinical data were noted between survivors and non-survivors. PaO2/FiO2 ratio was significantly lower in non-survivors than in survivors from 5 days after starting treatment, whereas no difference was apparent at the onset of ARDS.

CONCLUSIONS

Multimodal therapies for ARDS were effective. Longitudinal fluctuation in PaO2/ FiO2 ratio after starting treatment appears to offer a prognostic factor for ARDS.

Video capsule retention in a Zenker diverticulum

We report the case of a video capsule endoscope lodged within a Zenker diverticulum. The system that was equipped with a real-time viewer showed an unchanging image unlike esophageal or gastric mucosa, suggesting that the capsule was elsewhere. The presence of cervical discomfort suggested video capsule retention in a Zenker diverticulum. The capsule was removed endoscopically and reinserted using a hood-assisted endoscope and the procedure was completed.

Clinicopathological and prognostic value of microRNA-21 and microRNA-155 in colorectal cancer

OBJECTIVE

The clinical significance of microRNA-21 (miR-21) and miR-155 in colorectal cancer (CRC) patients remains elusive. In this study, we established the prognostic value of miR-21 and miR-155 using clinical samples from CRC patients. Furthermore, relationships between these microRNAs and target genes (PDCD4 and TP53INP1 mRNAs) were examined.

METHODS

miR-21 and miR-155 expression was assessed in tumor tissue and in adjacent normal tissue of 156 CRC patients by TaqMan MicroRNA assays, and PDCD4 and TP53INP1 mRNA levels were measured by quantitative real-time reverse transcriptase PCR (RT-PCR).

RESULTS

High miR-21 expression was significantly associated with venous invasion, liver metastasis and tumor stage, and high miR-155 expression was significantly correlated with lymph node metastases. The overall (OS) and disease-free survival (DFS) rates of patients with high miR-21 expression were significantly worse than those of patients with low miR-21 expression. The OS and DFS of patients with high miR-155 expression were also significantly worse than those in patients with low miR-155 expression. miR-21 and miR-155 expression levels in CRC tissue were independent prognostic factors for OS and DFS. Significant inverse correlations were demonstrated between miR-21 and PDCD4 mRNA, and miR-155 and TP53INP1 mRNA.

CONCLUSION

Increases in miR-21 and miR-155 expression may represent effective biomarkers for the prediction of a poor prognosis.

Feasibility of tailored, selective and effective anticancer chemotherapy by direct injection of docetaxel-loaded immunoliposomes into Her2/neu positive gastric tumor xenografts

We assessed the effects of direct injection of docetaxel-loaded immuno-(trastuzumab)-liposomes (IDL) on a xenograft mouse tumor model to determine potential clinical applications of intratumoral tailored chemotherapy against Her2/neu-overexpressing gastric cancer. The NCI-N87 Her2/neu overexpressing gastric cancer cell line xenograft mouse model was treated with IDL or docetaxel-loaded liposomes (DL). The ratio of the tumor volume of the treatment:control was determined. In addition, docetaxel pharmacokinetics in tumors were measured using high-performance liquid chromatography, and the cell viability and cell cycle distribution of Her2/neu positive cells were determined by flow cytometric analysis. The IDL group showed a significantly higher distribution of docetaxel in the N87 xenograft tumor tissues and superior antitumor efficacy compared to crude administration of docetaxel and/or trastuzumab and DL. The number of viable Her2/neu positive cells decreased following treatment with either free trastuzumab or IDL. On day 7 after treatment, a decrease in the G0/G1 phase of the cell cycle was observed in the DL and IDL groups compared to the control group. No local adverse effects were observed. These results suggest that intratumoral administration of IDL maintains a high concentration of docetaxel within the tumor leading to a safe and effective regional cancer therapeutic strategy. In addition to the inherent cytotoxic effect of trastuzumab, conjugation of trastuzumab to a liposome further enhanced the retention of docetaxel within the tumors. These data suggest that immuno-liposome mediated delivery of drugs is a promising new therapeutic option for patients with advanced gastric cancer that overexpress Her2/neu.

A case of fulminant amebic colitis with multiple large intestinal perforations

Amebic colitis normally causes mucous and bloody diarrhea stool as predominant symptoms, thus leading to a course of chronic colitis. However, though rare, there exists a fulminating type that causes intestinal perforations due to wide necrosis of the large intestine. We encountered a case of fulminant amebic colitis that lead to death due to multiple large intestinal perforations. The patient was a 72-year-old female. The patient was admitted to our hospital with symptoms of fever, abdominal pain, and diarrhea. She continued to have a fever of over 38 degrees C and increased left abdominal pain. An abdominal computed tomography scan revealed free gas on the abdominal side of the kidney. Therefore, gastrointestinal perforations were diagnosed and surgery was performed. In surgery, many perforated parts were observed from the appendix to the descending colon, and subtotal colectomy was performed. However, sepsis and disseminated intravascular coagulation occurred, and the patient died on the eighth postoperative day.

A case of appendiceal Crohn's disease in which a laparoscopic appendectomy was performed

A 74-year-old female had occasionally experienced right lower abdominal pain in the past. She underwent a barium enema examination during a medical checkup, which revealed a wall irregularity around the appendix, but the appendix itself was not visualized. The patient was referred to our hospital for possible appendiceal neoplasm. Colonoscopy revealed a tumor-like protrusion with marked redness at the entrance to the appendix. Pathologic analysis of biopsy specimens revealed only inflammatory cells. Differential diagnosis of appendiceal Crohn's disease or appendiceal neoplasm was made, and laparoscopic appendectomy was performed. Pathologic examination revealed inflammation in all layers of the appendiceal wall and noncaseating epithelioid cell granuloma, and a diagnosis of appendiceal Crohn's disease was made. The postoperative course was uneventful, and the patient was discharged from the hospital 3 days after surgery. No sign of recurrence has been observed up to now, 6 months after surgical treatment.

Continuous irrigation with gabexate mesilate around pancreaticojejunostomy after pancreaticoduodenectomy

BACKGOUND/AIMS: The aim of this study is to present the new method of continuously irrigated around the pancreaticojejunostomy to reduce postoperative complications after pancreaticoduodenectomy.

METHODOLOGY

Twenty-seven patients underwent pancreaticoduodenectomy in our institution between 2002 and 2007. Pancreaticojejunostomy was performed with the external pancreatic duct stent tube, and continuous irrigation around the pancreaticojejunostomy was started on the operative day with physiological saline solution containing gabexate mesilate.

RESULTS

Mean duration of irrigation was 7.1 +/- 4.4 days, mean duration of drainage tube placement was 14.2 +/- 9 days, and mean duration of pancreatic duct drainage tube placement was 24.9 +/- 4.7 days. Pancreatic fistula was diagnosed in 8 patients. Three cases were classified as grade A and 5 cases were grade B. These pancreatic fistulae were closed by non-invasive treatment and the in-hospital death rate was 0%.

CONCLUSIONS

External total drainage of the main pancreatic duct and continuous irrigation around pancreaticojejunostomy appears to avoid severe postoperative complications.

[A case of cervical lymph node recurrence of advanced gastric cancer responding to combination therapy of S-1, CDDP and docetaxel]

A 57-year-old man underwent total gastrectomy with D2 lymphadenectomy for advanced gastric cancer. The post operative diagnosis was Stage IIIB (tubular adenocarcinoma, moderately-differentiated type, SE, N2, M0). The patient's postoperative course was uneventful, and S-1 was administered as adjuvant chemotherapy. However, about 14 months later, a gradual left cervical lymph node swelling became evident, with an increase in the level of the tumor marker CA19-9, suggesting recurrence of the gastric cancer. After obtaining informed consent, S-1 (100 mg/body), cisplatin (60 mg/m2), and docetaxel (40 mg/m2) combination chemotherapy (DCS) was performed. After 5 courses of DCS, the patient's swollen left cervical lymph nodes became non-palpable, and also undetectable by diagnostic imaging, together with normalization of the CA19-9 level. At three months since the last chemotherapy, the patient showed no signs of recurrence. DCS is a potentially effective treatment for recurrent gastric cancer with resistance to S-1.

A case of paracecal hernia

A 63-year-old male patient suddenly suffered right lower abdominal pain. The patient had tenderness and rebound tenderness at the right lower abdomen. Marked small bowel dilatation and an intestinal obstruction were evident upon abdominal X-ray and abdominal computed tomography (CT) imaging. CT imaging also revealed a dilated small bowel cluster in a wrapped round shape in the right lower abdomen. The cecum and the ascending colon were displaced inward. Strangulation in the ileocecal region was suspected, and emergency surgery was performed. A part of the small bowel was incarcerated within the retrocecal recess, and the intestinal tract was strangulated in the hernia orifice, by which paracecal hernia was diagnosed. The strangulated intestinal tract was repositioned, and the orifice to the hernia was closed. Paracecal hernia is a rare disease; an internal hernia should always be considered in patients with ileus without a history of surgery.

Association of plasma VEGF-A, soluble VEGFR-1 and VEGFR-2 levels and clinical response and survival in advanced colorectal cancer patients receiving bevacizumab with modified FOLFOX6

For individualized bevacizumab-based therapy, non-invasive biomarkers are necessary. This study assessed the predictive value of plasma vascular endothelial growth factor (VEGF)-A, soluble VEGF receptor (sVEGFR)-1 and sVEGFR-2 levels as biomarkers for clinical response and survival in advanced colorectal cancer (CRC) patients treated with bevacizumab and modified FOLFOX6 (mFOLFOX6). Forty-six unresectable advanced CRC patients and 20 healthy controls were included in this study. CRC patients were treated with bevacizumab and mFOLFOX6. Pretreatment plasma VEGF-A, sVEGFR-1 and sVEGFR-2 levels were measured using the multiplex immunoassay. Plasma VEGF-A, sVEGFR-1 and sVEGFR-2 levels were significantly higher in CRC patients than in the healthy subjects. The plasma sVEGFR-1 levels in the responder patients [complete response (CR)/partial response (PR)] and stable disease (SD) patients were significantly lower than those in the progressive disease (PD) patients (CR/PR vs. PD, p=0.025; SD vs. PD, p=0.032), while the plasma VEGF-A and sVEGFR-2 levels did not show any significant differences between the two groups of patients. Patients with higher sVEGFR-1 levels showed a significantly poorer progression-free survival (PFS) and overall survival (OS) than those with lower VEGFR-1 levels. In contrast, VEGF-A and sVEGFR-2 did not show any significant relationship between PFS and OS according to the status of each level. In the multivariate Cox proportional hazard regression analysis, sVEGFR-1 levels showed a significant relationship between PFS and OS. These results suggest that plasma sVEGFR-1 levels have a predictive value for clinical response and survival in advanced CRC patients treated with bevacizumab and mFOLFOX6. Larger scale studies are needed to further validate our results.

Papillary muscle head approximation for the treatment of mitral valve regurgitation combined with aortic valve disease

We initiated an original papillary muscle head approximation procedure, commonly known as Sandwich plasty, for the treatment of ischemic mitral regurgitation (MR). In this study, we evaluated the appropriateness of this procedure for functional MR associated with aortic valve disease. Fifteen patients who had undergone Sandwich plasty combined with aortic valve surgery were included in this study. The mean age of the patients was 69 years. Predominant aortic valve diseases were regurgitation in 8 patients and stenosis in 7 patients. Aortic valve replacement was performed in 14 patients and David surgery in one. The mitral valve was approached through the aortic annulus in 9 patients (the transaortic group). Six other patients with mitral valve annulus of 30 mm or larger underwent concomitant mitral ring-annuloplasty through a left atrial incision (the LA group). The tenting height of the mitral valve and left ventricle diastolic diameter significantly decreased after surgery in both groups. After surgery, residual moderate or mild MR was detected in two patients in the transaortic group. In the LA group, residual mitral regurgitation was not detected. In the follow-up study, prominent MR occurred in two patients in the transaortic group. The MR free rate two years after surgery was 83% in the total patient population. Sandwich plasty was simple and effective in the treatment of functional mitral regurgitation combined with aortic valve surgery. A transaortic approach is effective in obviating a separate left atriotomy and reducing operation time.

Esophageal cancer resection associated with a right aortic arch after descending aortic graft replacement

Right aortic arch is a rare abnormality. Esophageal cancer associated with a vascular ring is even more rare. We describe a patient with right aortic arch who had previously undergone a graft replacement of descending aorta for aneurysmal rupture followed by subsequent surgery for advanced esophageal cancer. Preoperative three-dimensional computed tomography revealed mirror image branching type right aortic arch and Kommerell's diverticulum of the descending aorta. The patient underwent total esophagectomy with laryngopharyngectomy and regional lymphadenectomy via a left thoracotomy. A permanent tracheal fistula was constructed. Postoperative chemo-radiotherapy was applied. The patient was discharged from hospital and is doing well. Early division of the ligamentum arteriosum with careful management of the aortic diverticulum led to release of the esophagus from the vascular ring that rendered the following procedures safe and afforded a good operative view.

Portal and splenic venous thrombosis after splenectomy in patients with hypersplenism

BACKGROUND/AIMS

Portal and splenic venous thrombosis (PSVT) is not a rare complication of splenectomy. We report a retrospective study of PSVT after splenectomy in patients with liver cirrhosis and clarify the risk factors and discuss the necessity of preventive pharmacotherapy.

METHODOLOGY

Potential subjects comprised 27 patients who underwent splenectomy (including laparoscopic splenectomy) at our hospital between January 2003 and December 2005 for hypersplenism due to liver cirrhosis. Perioperative data were assessed for 17 patients who did not have portal tumor thrombus and followed-up regularly.

RESULTS

PSVT occurred in 5 of the 17 patients (29%), none of them were symptomatic throughout follow-up. PSVT disappeared spontaneously in 2 of the 5 patients (40%) without any treatment. Patients with PSVT showed significant differences in comparison with patients without PSVT in age, preoperative platelet count, intraoperative bleeding,splenic weight and platelet-associated immunoglobulin G (PAIgG), CONCLUSIONS: PSVT occured at a high rate in patients after splenectomy, but at a lower than in patients with hematopathies. According to our results, thrombolytic agent may be required only when patients show symptoms of PSVT. Preoperative serum PAIgG level may represent worthwhile markers for predicting PSVT.

Prospective randomized trial comparing the direct method using a 24 Fr bumper-button-type device with the pull method for percutaneous endoscopic gastrostomy

BACKGROUND AND STUDY AIMS

Percutaneous endoscopic gastrostomy (PEG) is the preferred route for long-term enteral feeding. The aim of this study was to compare a direct, modified introducer method using a bumper-button-type device with the standard pull method for PEG.

PATIENTS AND METHODS

Between October 2005 and January 2007 consecutive patients with dysphagia were randomly assigned to PEG using either the direct method or the pull method. The direct method directly placed a 24 Fr bumper-button-type device assisted by dual gastropexy. The primary outcome measure was the rate of peristomal infections. Secondary measures included success rates, procedure times, and other complications. The long-term outcome measure was the need for catheter change within 180 days of the PEG procedure.

RESULTS

Of the 140 patients enrolled, 68 were assigned to the direct method and 72 to the pull method. There were no significant differences between the two groups with respect to clinical baseline parameters. The occurrence of peristomal infection within 30 days was significantly lower following the direct method (0 vs. 6, P = 0.028). The success rates and duration of both methods were similar (100% vs. 100%; 10.5 vs. 9.6 minutes, P = 0.48). The catheters used in the direct method required replacement significantly less often than those placed using the pull method (no catheter change in 180 days: 75% vs. 45.2%, P = 0.0019).

CONCLUSIONS

The direct method using a 24 Fr bumper-button-type device was associated with reduced peristomal infections in the early phase and reduced catheter changes compared with a 20 Fr catheter placed using the standard pull method.

Novel tumor-ablation device for liver tumors utilizing heat energy generated under an alternating magnetic field

BACKGROUND AND AIMS

We have developed a novel tumor-ablation device for liver tumors utilizing heat energy induced by magnesium ferrite (MgFe(2)O(4)) particles under an alternating magnetic field (AMF) produced by electric currents. This novel device can repeatedly heat liver tumors at lower temperature than usual heating devices, such as radiofrequency ablation therapy, with slight infliction of pain. This study assesses its heating effect on rat liver tumors as local therapy.

METHOD

The small needle was manufactured from MgFe(2)O(4) particles by sintering at 1100 degrees C. After a MgFe(2)O(4) needle was inserted into liver tumors comprising of dRLh-84 cells, the tumors were heated for 30 min under an AMF. We examined cellular activity by using nicotinamide adenine dinucleotide (NADH) diaphorase staining and terminal deoxynucleotidyl transferase-mediated digoxigenin-dUTP nick-end labeling (TUNEL) staining, and evaluated the effect of suppressing tumor growth by sequentially comparing the tumor diameter with that of the control group.

RESULTS

The mean temperature of the heated tumors was 60.2 +/- 1.8 degrees C. The tumor cells were constricted, and chromatin of nuclei had shrunk immediately after heating. The heat-injury area that contained the tumors was negative for NADH diaphorase activity. After 3 days, the tumor cells in the heat-injury area became positive for TUNEL staining, which detects cell death. At 7 days, the mean tumor diameters were significantly smaller in the heating group than in the control group (6.15 +/- 0.47 mm vs 16.89 +/- 2.69 mm; P < 0.05).

CONCLUSION

This device, utilizing heat energy induced by ferromagnetic metal under an AMF, appears useful as local thermotherapy for human liver cancer.

[Collagen gel droplet-embedded culture drug sensitivity test in human breast cancer]

The efficacy of the collagen gel droplet-embedded culture drug sensitivity test (CD-DST) was estimated clinically among breast cancer patients to select a rational chemotherapy. Twenty-five specimens of breast cancer (n=21) or lymph nodes (n=4) were investigated. Four anticancer drugs (5-Fluorouracil, Adriamycin (ADM), Docetaxel (DOC), Paclitaxel (PTX)) were estimated for CD-DST. Sixteen samples among 25 samples (64.0%) seemed to be worth estimation. The chemosensitivity values were as follows: 5-FU 30.8%, ADM 30.8%, DOC 53.8% and PTX 46.2%, respectively. Thus, CD-DST may predict the chemosensitivity with high accuracy in breast cancer patients and seems to be superior to the conventional predictors.

Delayed laparoscopic subtotal cholecystectomy in acute cholecystitis with severe fibrotic adhesions

BACKGROUND

Conversion rate to open surgery is higher for patients with acute cholecystitis than in those without acute cholecystitis. We attempted to develop a laparoscopic subtotal cholecystectomy to decrease this conversion rate.

METHODS

From 2000 to 2005, laparoscopic cholecystectomy for acute cholecystitis was performed in 60 patients (22 women, 38 men). Patients were divided into two groups: group A (2000 to 2002, n = 22) and group B (2003 to 2005, n = 38). When significant difficulty was encountered dissecting the gallbladder from its bed, we incised the gallbladder wall leaving the posterior wall and cauterizing the remnant mucosa (subtotal cholecystectomy, SC-1). When dissection of the gall bladder neck and triangle of Calot was difficult, the neck of the gallbladder was sutured despite clipping (SC-2).

RESULTS

Mean duration from onset of symptoms to operation was 55.3 +/- 52.0 days. SC-1 was performed in 8 patients in group A and 18 patients in group B. SC-2 was performed in three patients in Group B. Conversion rate was 18.1% (4/22) in group A and 0% (0/38) in group B, compared to 0.4% (1/221) for patients without acute cholecystitis. No complications were associated with ablated gallbladder mucosa.

CONCLUSION

Laparoscopic subtotal cholecystectomy offers safe and effective treatment for acute cholecystitis. The conversion rate in group B is decreased by avoiding hazardous dissection of the cystic duct.

Feasibility of induction heating using a sintered MgFe2O4 needle for minimally invasive breast cancer therapy

BACKGROUND

This study investigated a novel approach for tumor ablation therapy using an alternating magnetic field combined with a sintered MgFe2O4 needle. This method differs from radiofrequency ablation (RFA) by dielectric heating with regard to the heating mechanism and improves some weak points of these conventional thermotherapies.

MATERIALS AND METHODS

Nude mice mimicking human breast cancer BT474 were treated using this method. The extent of tumor death was assessed after ablation.

RESULTS

Staining with hematoxylin and eosin showed gradual expansion of the pyknotic area until 48 h after ablation. Nicotinamide adenine dinucleotide diaphorase staining also showed complete tumor death by 48 h after treatment. The ablation area was well controlled and reablation was not necessary. The tumor could be completely controlled using this method without any risk of skin burn.

CONCLUSION

This novel ablation therapy appeared to be more effective and less invasive for treatment of breast cancer treatment than RFA.

Sigmoid colon endometriosis treated with laparoscopy-assisted sigmoidectomy: Significance of preoperative diagnosis

We present a female patient with sigmoid colon endome-triosis who was diagnosed correctly preoperatively and underwent minimally invasive surgery. She was admitted to our hospital with rectal bleeding and constipation. We performed several workups. Colonoscopy and endoscopic ultrasonography showed sigmoid colon stenosis caused by submucosal tumor, and magnetic resonance imaging revealed a sigmoid colon tumor displaying signal hy-pointensity on both T1- and T2-weighted imaging. However, colonoscopic ultrasonography-assisted needle aspiration biopsy could not specify tumor characteristics. From these examinations, the lesion was diagnosed as sigmoid colon endometriosis and laparoscopy-assisted sigmoidectomy was performed. Pathological diagnosis from the resected specimen was identical to preoperative diagnosis, i.e., colonic endometriosis. Since differential diagnosis of intestinal endometriosis seems difficult, a cautious preoperative diagnosis is required to select treatments including minimally invasive surgery.

Significance of laparoscopic splenectomy in patients with hypersplenism

OBJECTIVE

This study was aimed at investigating the efficacy and safety of minimally invasive laparoscopic splenectomy in patients with hypersplenism secondary to cirrhosis.

BACKGROUND

While advances have been made in the treatment of liver cancer and chronic hepatitis, certain treatments such as radio frequency ablation (RFA) must often be discontinued due to thrombocytopenia caused by hypersplenism. Laparoscopic splenectomy is performed to treat diseases as idiopathic thrombocytopenic purpura, but is contraindicated for hypersplenism in many institutions. Few studies have thus examined the safety and efficacy of this approach.

METHODS

Efficacy and safety were retrospectively analyzed for laparoscopic splenectomies starting from January 2003. Relationships between postoperative increases in platelet count and thrombopoietin, platelet-associated immunoglobulin, excised spleen weight, and serum parameters were examined. Perioperative data of open splenectomies starting from January 1990 were compared with those of laparoscopic splenectomies.

RESULTS

No laparoscopic cases were converted to open surgery in this series. Mean operative times of open and laparoscopic splenectomy were 205 and 173 min respectively. Mean blood losses were 750 and 359 ml (P < 0.05) and the mean weights of excised spleen were 460 and 525 g respectively. Postoperatively, no changes in liver function were noted, and platelet and leukocyte counts were significantly increased. Compared with preoperative platelet count, degree of increase at 2 weeks postoperatively did not correlate with preoperative thrombopoietin levels, but significantly correlated with levels of platelet-associated immunoglobulin and spleen volume (P < 0.05). Postoperative portal or splenic vein thrombosis (PSVT) was seen in 3 patients and these patients did not exhibit any clinical symptoms.

CONCLUSIONS

Laparoscopic splenectomy is a safe technique for the treatment of hypersplenism and contributes to postoperative increases in platelet counts. Postoperative increases in platelet count seem to depend on platelet-associated immunoglobulin level and spleen weight, which may be valuable prognosticators.

Combined mediastinal node assessment by lymphadenectomy and intraoperative mediastinoscopy

The purpose of this study was to determine the importance of combined mediastinal node assessment by lymphadenectomy and intraoperative mediastinoscopy to patients with left lung cancer. Forty-one patients with left lung cancer were divided into a group of 13 and a group of 28: in the first group, the aortic arch was mobilized, while in the second group the aortic arch was not mobilized. The mediastinal nodes of both groups were then dissected and mediastinoscopes were inserted into the operation field with an approach through thoracotomy to biopsy each mediastinal node. We compared nodal pathological assessment in these two groups. In the group with mobilized aortic arches, pathological assessment of lymphadenectomy at Naruke's station 3 was 11/13 (85%) and combined with intraoperative mediastinoscopy was 12/13 (92%). In the group without mobilized aortic arches, pathological assessment of lymphadenectomy of station 3 was 14/28 (50%) and combined use of intraoperative mediastinoscopy significantly improved the diagnoses to 24/28 (86%) (P=0.004). Combined use of lymphadenectomy and intraoperative mediastinoscopy could improve the assessment of station 3 in left lung cancer without mobilizing aortic arch.

Usefulness of linear stapling device in distal pancreatic resection

BACKGROUND/AIMS

Although the mortality rate related to pancreatic surgery has been reduced, postoperative pancreatic fistula (POPF) remains high. The rate of POPF is reportedly between 5 and 34%. The pancreatic stump is typically closed by hand using suture materials. Recently, linear stapling devices have been employed in pancreatic resection, but the efficacy and safety of this procedure remain uncertain.

METHODOLOGY

Efficacy and safety were retrospectively analyzed for distal pancreatic resection using a linear stapling device in open and laparoscopic procedures starting from January 1999 (Group A: n=20), and perioperative data were compared with those for hand-sewn stump closure starting from January 1990 (Group B: n=28).

RESULTS

Mean operative times in Group A and Group B were 165 min and 200 min, respectively (p < 0.05). POPF was observed in two cases in Group A (10%) and 10 cases in Group B (35%) (p < 0.05). POPF was not observed in the three patients who underwent laparoscopic pancreatic resection with the linear stapling device. Mean hospital stay for Groups A and B was 14 days and 20 days, respectively (p < 0.05). In POPF patients, no clinical symptoms were observed, but drains were removed 10 postoperative days later than in patients without POPF, from whom drains were withdrawn at 7 days (p < 0.05). Patients exhibiting POPF were treated conservatively and all patients were discharged in good health.

CONCLUSIONS

It may be concluded that: (1) drains should be withdrawn carefully according to the volume and characteristics of exudates; (2) mechanical staplers are promising devices for distal pancreatic resection; and (3) laparoscopic procedures are also promising for distal pancreatic resection.

Evaluation of prognostic factors and scoring system in colonic perforation

AIM: To study the significance of scoring systems assessing severity and prognostic factors in patients with colonic perforation.

METHODS: A total of 26 patients (9 men, 17 women; mean age 72.7 ± 11.6 years) underwent emergency operation for colorectal perforation in our institution between 1993 and 2005. Several clinical factors were measured preoperatively and 24 h postoperatively. Acute physiology and chronic health evaluation II (APACHE II), Mannheim peritonitis index (MPI) and peritonitis index of Altona (PIA II) scores were calculated preoperatively.

RESULTS: Overall postoperative mortality rate was 23.1% (6 patients). Compared with survivors, non-survivors displayed low blood pressure, low serum protein and high serum creatinine preoperatively, and low blood pressure, low white blood cell count, low pH, low PaO₂/FiO₂, and high serum creatinine postoperatively. APACHE II score was significantly lower in survivors than in non-survivors (10.4 ± 3.84 vs 19.3 ± 2.87, P = 0.00003). Non-survivors tended to display high MPI score and low PIA II score, but no significant difference was identified.

CONCLUSION: Pre- and postoperative blood pressure and serum creatinine level appear related to prognosis of colonic perforation. APACHE II score is most associated with prognosis and scores ≥ 20 are associated with significantly increased mortality rate.

Metastatic osteosarcoma in the jejunum with intussusception: report of a case

We report a case of metastatic osteosarcoma in the jejunum causing intestinal intussusception. A 58-year-old woman underwent right femoral region amputation, lower lobectomy of the left lung and complete left pneumonectomy after four courses of chemotherapy for osteosarcoma of the right femur with left lung metastases. She was referred to our department 13 months later with progressive abdominal pain and vomiting. Abdominal radiography showed a small-bowel obstruction. She underwent emergency laparotomy, which revealed jejunal intussusception. The lead point was found to be an intraluminal tumor. We resected the jejunum containing the tumor and histological examination confirmed that the tumor was osteosarcoma metastasis.

Morphologic analyses of mandible and upper airway soft tissue by MRI of patients with obstructive sleep apnea hypopnea syndrome

STUDY OBJECTIVES

To evaluate the morphological features of the mandible and the volume of the upper airway soft tissues in determining the anatomical risk factors for the upper airway in Japanese male patients with obstructive sleep apnea hypopnea syndrome (OSAHS).

METHODS

Five morphological parameters of the mandible at the mandibular base plane and three volumetric parameters of the upper airway soft tissue were analyzed using three-dimensional (3D) magnetic resonance imaging software in 31 OSAHS and 20 controls.

RESULTS

There were no significant differences between the two groups in mandibular internal width (the distance between the internal right and left gonia [IRG and ILG]) and mandibular bony thickness. However, the patients with OSAHS had a significantly wider mandibular divergence (the angle between the spina mentalis (SM)- IRG line and SM- ILG line), a smaller mandibular internal length (the perpendicular distance from SM to the RG- LG line), and a smaller area than the normal subjects at the mandibular base plane. There were no significant differences in these morphological parameters for the mandible between obese and nonobese OSAHS patients. The volumes of the tongue, soft palate, and lateral pharyngeal walls were not significantly different between the OSAHS and the control groups.

CONCLUSIONS

Japanese male OSAHS patients had specific anatomical features in the bottom part of the mandible; however, obesity seemed to be a less significant risk factor. Investigators and clinicians must realize that ethnicity may modify the effects of obesity and abnormal craniofacial anatomy as risk factors for the pathogenesis of OSAHS.

Psychiatric, somatic, and gastrointestinal disorders, and Helicobacter pylori infection in children with recurrent abdominal pain

AIMS

To examine the utility of the Rome II criteria in children with recurrent abdominal pain (RAP) and compare them to those who met Apley's criteria and those who met neither criteria.

METHODS

Prospective study in general paediatric clinics in Komagane, Japan. Children with abdominal pain were classified into those who met Rome II criteria, those who met Apley's criteria, and those who met neither.

RESULTS

A total of 182 children with RAP participated; 45 children met Rome II criteria, 55 met Apley's criteria, and 82 met neither. Children who met Rome II criteria had a significantly higher prevalence of psychiatric and somatic disorders compared to the group met neither (36% v 6%, 22% v 10%, respectively). The overall prevalence of H pylori was 7%; prevalence increased with age from 3% at age < or = 10 to 10% for children >10 years. Children who met Rome II criteria had a significantly higher prevalence of H pylori infection than the reference group (18% v 4%). In a logistic regression model, all the study variables were included in the model specifying first the Rome II criteria group as the independent variable; psychiatric disorders, H pylori infection, and older age group were independent risk factors.

CONCLUSIONS

More than half the children suffering from recurrent abdominal pain met neither Apley's nor Rome II criteria. Children who meet Rome II criteria should be evaluated for psychiatric disorders and should be tested for H pylori infection. Despite the overall trend for a fall in the prevalence of H pylori infection among children in Japan, there are subpopulations of sick children where the prevalence of the infection is relatively high.