Portal venous gas accompanied by gallbladder torsion: a case report.

Portal venous gas (PVG) generally suggests critically ill conditions such as severe bowel ischemia. We herein report a rare case of gallbladder torsion with PVG. An 88-year-old woman complained of right hypogastric pain. Ultrasonography (US) showed diffuse wall thickening of her gallbladder and mobile echogenic foci moving inside the portal venous branches. Computed tomography showed a thickened wall of the gallbladder with poor enhancement and tiny pockets of air in the portal venous branches (segments 4 and 5). There was no evidence of other visceral ischemia. She was diagnosed with necrotic cholecystitis and immediately underwent an emergency operation. We found a gangrenous gallbladder with 180° clockwise rotation along the longitudinal axis and performed cholecystectomy. We confirmed the disappearance of PVG with US after the operation. Her postoperative course was uneventful. Gallbladder diseases can produce PVG, and US might be a useful diagnostic modality to evaluate changes in PVG.

A laryngeal foreign body resembling cervical emphysema.

An 81-year-old woman was referred to our hospital with a chief complaint of chest discomfort; CT imaging suggested for cervical emphysema. However, direct observation revealed a grilled liver stuck to the larynx. Carefully taking the patient's history, especially diet, is important to diagnose a laryngeal foreign body correctly.

Arteriovenous malformation of small intestine successfully treated by double-balloon enteroscopy and laparoscope-assisted surgery.

Arteriovenous malformation (AVM) of the small bowel is a rare disease and can be sometimes difficult to treat due to the diagnostic difficulty. We herein report a case of small intestinal bleeding of AVM successfully treated with double-balloon enteroscopy (DBE) and laparoscope-assisted resection. A 44-year-old man complained of hematochezia and visited the previous doctor. He underwent gastroscopy and colonoscopy, but no bleeding site was detected. However, he rebled 2 days later and became hypotensive. Abdominal computed tomography revealed a hypervascular nodule in the jejunum. He was transferred to our institution for further treatment. DBE was performed and revealed a small pulsatile lesion with a tiny mucosal break. We then injected a marking tattoo. Two days later, he underwent an operation. We were able to easily locate the tattooed lesion laparoscopically and performed jejunal partial resection. His postoperative course was uneventful. DBE enabled a precise diagnosis and minimal invasive surgery.

Heterogeneity of Glucose Metabolism in Esophageal Cancer Measured by Fractal Analysis of Fluorodeoxyglucose Positron Emission Tomography Image: Correlation between Metabolic Heterogeneity and Survival.

BACKGROUND: Intratumoral heterogeneity is a well-recognized characteristic feature of cancer. The purpose of this study is to assess the heterogeneity of the intratumoral glucose metabolism using fractal analysis, and evaluate its prognostic value in patients with esophageal squamous cell carcinoma (ESCC). METHODS: 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) studies of 79 patients who received curative surgery were evaluated. FDG-PET images were analyzed using fractal analysis software, where differential box-counting method was employed to calculate the fractal dimension (FD) of the tumor lesion. Maximum standardized uptake value (SUVmax) and FD were compared with overall survival (OS). RESULTS: The median SUVmax and FD of ESCCs in this cohort were 13.8 and 1.95, respectively. In univariate analysis performed using Cox's proportional hazard model, T stage and FD showed significant associations with OS (p = 0.04, p < 0.0001, respectively), while SUVmax did not (p = 0.1). In Kaplan-Meier analysis, the low FD tumor (<1.95) showed a significant association with favorable OS (p < 0.0001). In wthe multivariate analysis among TNM staging, serum tumor markers, FD, and SUVmax, the FD was identified as the only independent prognostic factor for OS (p = 0.0006; hazards ratio 0.251, 95% CI 0.104-0.562). CONCLUSION: Metabolic heterogeneity measured by fractal analysis can be a novel imaging biomarker for survival in patients with ESCC.

Suture Granuloma With False-Positive Findings on FDG-PET/CT Resected via Laparoscopic Surgery.

A 61-year-old woman who had undergone total hysterectomy 16 years previously exhibited a pelvic tumor on computed tomography (CT). F-18 fluorodeoxyglucose (FDG) combined positron emission tomography (PET)/CT imaging revealed a solitary small focus of increased FDG activity in the pelvis. A gastrointestinal stromal tumor originating in the small intestine or another type of tumor originating in the mesentery (desmoid, schwannoma, or foreign body granuloma) was suspected; therefore, laparoscopic resection was conducted. A white, hard tumor was found to originate from the mesentery of the sigmoid colon and adhered slightly to the small intestine. The tumor was resected with a negative margin, and the pathologic diagnosis was suture granuloma. The possibility of suture granuloma should be kept in mind in cases of tumors with positive PET findings and a history of surgery close to the lesion. However, it is difficult to preoperatively diagnose pelvic tumors using a biopsy. Therefore, considering the possibility of malignancy, it is necessary to achieve complete resection without exposing the tumor.

Synthetic polyglycomer short-term absorbable sutures vs. polydioxanone long-term absorbable sutures for preventing incisional hernia and wound dehiscence after abdominal wall closure: a comparative randomized study of patients treated for gastric or colon cancer.

PURPOSE: To compare the results of abdominal wall closure using interrupted synthetic short-term vs. long-term tensile strength-retaining absorbable sutures. METHODS: The subjects were 55 patients undergoing elective laparotomy through a midline vertical incision for gastric or colon cancer surgery between November 2008 and August 2010, at our hospital. After providing informed consent, the patients were randomized for suturing with Polysorb(®), which provides short-term tensile strength, or with PDS(®)II, which provides long-term strength. The primary outcome analyzed was the incidence of incisional hernia or wound dehiscence. RESULT: There were 28 patients allocated to the Polysorb group and 27 to the PDS II group. Postoperative wound dehiscence was noted in two patients (3.6%). Five of 51 patients (9.8%) suffered incisional hernia within 1 year after surgery, 6 of 41 patients (14.6%) within 2 years, and 6 of 35 patients (17.1%) within 3 years. There was no significant per year difference in the incidence of incisional hernia or wound dehiscence between the groups. CONCLUSION: Outcomes were favorable in both groups and not inferior to reported outcomes of larger-scale studies. Verification of the equivalence between the two types of suture material necessitates larger-scale studies that adopt the same suture methods.

A case of giant ileal duplication in an adult, successfully treated with laparoscope-assisted surgery.

Alimentary tract duplication is a rare congenital malformation but can occur anywhere along the digestive tract. Most patients become symptomatic in early childhood, and only a few cases of adult patients have been reported in the literature. We herein report a unique case of a giant ileal duplication in an adult, which was successfully treated with laparoscope-assisted surgery. A 60-year-old male was admitted because of abdominal pain. Imaging studies revealed a well-defined cystic mass, measuring 15 cm, in the ileocecal region. We diagnosed it as a duplicated ileum and performed laparoscope-assisted surgery. The duplication was successfully resected with attached normal ileum, and there were no major complications in the postoperative course.

Severe diffuse duodenitis successfully treated with intravenous tacrolimus after colectomy for ulcerative colitis.

We encountered a rare case of severe diffuse duodenitis associated with ulcerative colitis (UC). A 23-year-old man underwent total proctocolectomy with ileal J-pouch anal anastomosis for UC. He suffered from severe abdominal pain, fever and bloody diarrhea for six months after the surgery. Upper double-balloon enteroscopy disclosed severe diffuse duodenitis, of which the findings were endoscopically and histologically similar to those of colonic lesions of UC. Although the administration of prednisolone was ineffective, treatment with intravenous tacrolimus markedly improved the clinical findings. This is the first report of the successful treatment of severe UC-associated diffuse duodenitis with intravenous tacrolimus.

Preoperative hepatic CT perfusion as an early predictor for the recurrence of esophageal squamous cell carcinoma: initial clinical results.

Reports suggest that hepatic blood flow may have an association with cancer progression. The aim of the present study was to evaluate whether the hepatic blood flow measured by CT perfusion (CTP) may identify patients at high­risk for postoperative recurrence of esophageal squamous cell carcinoma (ESCC). Prior to surgery, hepatic CTP images were obtained using a 320-row area detector CT. The data were analyzed by a commercially available software based on the dual input maximum slope method, and arterial blood flow (AF, ml/min/100 ml tissue), portal blood flow (PF, ml/min/100 ml tissue) and perfusion index [PI (%) = AF/AF + PF x 100] were measured. These parameters were compared with the pathological stage and outcome of the ESCC patients. Forty-five patients with ESCC were eligible for this study. The median follow-up period was 17 months, and recurrences were observed in 9 patients (20%). The preoperative PI values of the 9 patients with recurrence were significantly higher than those of the 36 patients without recurrence (23.9 vs. 15.9, P=0.0022). Patients were categorized into the following two groups; high PI (>20) and low PI (<20). The recurrence-free survival of the low PI group was significantly better than that of the high PI group (P<0.0001). A multivariate analysis showed that a high PI was an independent risk factor for recurrence (odds ratio, 19.1; P=0.0369).Therefore, the preoperative PI of the liver may be a useful imaging biomarker for predicting the recurrence of patients with esophageal cancer.

[Neoadjuvant chemotherapy for advanced colorectal cancer].

BACKGROUND: The prognosis of advanced colorectal cancer after surgical resection remains poor if curative resection cannot be achieved. Neoadjuvant chemotherapy( NAC) may increase the curative resection rate and reduce the recurrence rate following resection of marginally resectable advanced colorectal cancer by ensuring adequate surgical margin and controlling micro-metastases. Herein, we report the treatment regimen and outcomes of NAC for advanced colorectal cancer at our institute. PATIENTS AND METHODS: Between April 2005 and December 2012, 10 patients with marginally resectable advanced colorectal cancer received NAC before undergoing laparotomy. NAC consisted of 4 to 8 courses of the FOLFIRI-3 regimen combined with molecular targeted agents. Laparotomy was performed 4 to 6 weeks after the last course of NAC, and 12 courses of mFOLFOX6 were recommended as adjuvant chemotherapy after surgery. RESULTS: A partial response (PR) according to Response Evaluation Criteria in Solid Tumors ver. 3 was observed in 5 patients and progressive disease (PD) was not observed in any patient. Curative resection was achieved in 9 patients. All patients are currently alive, and the 2-year relapse-free survival rate was 62.2%. CONCLUSIONS: This is a retrospective study of a small number of subjects; however, the results suggest that NAC for marginally resectable advanced colorectal cancer increases the curative resection rate and reduces the recurrence rate.

Tracheal compression by the gastric tube in esophageal cancer with ankylosing spondylitis and an analysis of the mediastinal condition in 84 cases of esophagectomy: report a case.

Pneumonia, recurrent nerve injury and anastomotic leakage are common complications occurring after esophagectomy. However, there have so far been few reports on tracheal compression by the gastric tube. The patient was a 66-year-old female with a history of ankylosing spondylitis and esophageal superficial squamous carcinoma treated with endoscopic mucosal resection. The new lesion was located just next to the last treated lesion. Therefore, it was difficult to treat this lesion endoscopically because of severe stenosis and scarring due to the previous treatment. Transhiatal esophagectomy was therefore performed. However, severe tracheal obstruction occurred following extubation after the surgery due to compression caused by the gastric tube. This case was successfully treated with a mediastinal pleural incision through a right thoracotomy. The distance between the sternum and the vertebra in this case was narrower than normal, thereby inducing this rare condition.

[Evaluation of tumor heterogeneity for esophageal squamous cell cancer by dynamic FDG-PET].

The aim of this study is to assess the tumor heterogeneity of esophageal squamous cell cancer by dynamic FDG-PET (dPET). Thirty patients were enrolled in this study. Images were obtained after intravenous injection of 370 MBq of 18F-FDG for 1 h. The time-density curve of the standardized uptake value( SUV) was evaluated quantitatively by fractal analysis. Tumor fractal dimension (FD) maps were acquired, and the FD of the tumor was measured. There was a significant correlation between FD and the clinical response to adjuvant therapy. The FD reduction rates of adjuvant therapy were 23.23% in the responder group and 5.83% in the nonresponder group. FD may be a valid imaging biomarker for assessing the response to neoadjuvant therapy.

[Evaluation of false-negative lymph nodes diagnosed by fludeoxy glucose-positron emission tomography in cases of metastatic esophageal squamous cell carcinoma].

We have encountered many cases wherein the metastatic nest of esophageal squamous cell carcinoma occupied only a small space in the lymph nodes because of which computed tomography( CT) and fludeoxy glucose( FDG)-positron emission tomography( PET) could not detect the lymph node metastasis satisfactorily. The false-negative lymph nodes that were not detected by FDG-PET before surgery were smaller in diameter, rate of occupation, and area of occupation than the true-positive lymph nodes. The smallest area of the cancer nest in the true-positive group was 7.5 mm2, and therefore, it was reasonable to consider a 5-mm diameter area as the criteria for correct diagnosis by FDG-PET. Most of the false-negative lymph nodes with a large area of carcinoma were attached to the primary tumor; therefore, they could not be precisely identified. The detection of false-negative lymph nodes by FDG-PET was not precise because of increases in the quantity of stroma-like cells in poorly differentiated carcinomas and in fibrosis caused by neoadjuvant therapy in the lymph nodes.

Utility of arterial phase of dynamic CT for detection of intestinal ischemia associated with strangulation ileus.

AIM: To clarify the usefulness of arterial phase scans in contrast computed tomography (CT) imaging of strangulation ileus in order to make an early diagnosis. METHODS: A comparative examination was carried out with respect to the CT value of the intestinal tract wall in each scanning phase, the CT value of the content in the intestinal tract, and the CT value of ascites fluid in the portal vein phase for a group in which ischemia was observed (Group I) and a group in which ischemia was not observed (Group N) based on the pathological findings or intra-surgical findings. Moreover, a comparative examination was carried out in Group I subjects for each scanning phase with respect to average differences in the CT values of the intestinal tract wall where ischemia was suspected and in the intestinal tract wall in non-ischemic areas. RESULTS: There were 15 subjects in Group I and 30 subjects in Group N. The CT value of the intestinal tract wall was 41.8 ± 11.2 Hounsfield Unit (HU) in Group I and 69.6 ± 18.4 HU in Group N in the arterial phase, with the CT value of the ischemic bowel wall being significantly lower in Group I. In the portal vein phase, the CT value of the ischemic bowel wall was 60.6 ± 14.6 HU in Group I and 80.7 ± 17.7 HU in Group N, with the CT value of the ischemic bowel wall being significantly lower in Group I; however, no significant differences were observed in the equilibrium phase. The CT value of the solution in the intestine was 18.6 ± 9.5 HU in Group I and 10.4 ± 5.1 HU in Group N, being significantly higher in Group I. No significant differences were observed in the CT value of the accumulation of ascites fluid. The average difference in the CT values between the ischemic bowel wall and the non-ischemic bowel wall for each subject in Group I was 33.7 ± 20.1 HU in the arterial phase, being significantly larger compared to the other two phases. CONCLUSION: This is a retrospective study using a small number of subjects; however, it suggests that there is a possibility that CT scanning in the arterial phase is useful for the early diagnosis of strangulation ileus.

[Neoadjuvant chemotherapy for recurrent colorectal cancer].

BACKGROUND: The prognosis after surgical resection of recurrent colorectal cancer is still poor, even if it is diagnosed as "resectable" before operation. Neoadjuvant chemotherapy (NAC) may reduce the recurrence rate after resection of recurrent lesions by ensuring the surgical margin and controlling micro-metastases. This report presents the treatment regimen and outcome of NAC for recurrent colorectal cancer at this institution. PATIENTS AND METHODS: Nineteen patients with recurrent colorectal cancer, excluding hepatic and pulmonary metastases, received NAC before laparotomy between April 2005 and November 2011. The FOLFIRI3 regimen combined with molecular targeting agents was used for NAC, and 4 to 8 courses were administered. Laparotomy was performed during the 4-to 6-week period after the last NAC administration, and 12 courses of mFOLFOX6 were recommended as adjuvant chemotherapy after the operation. RESULTS: Complete remission was observed in 1 patient and partial remission in 7 patients according to Response Evaluation Criteria in Solid Tumors ver. 3, and no progressive disease was observed. Curative resection was achieved in 13 patients. The 3-year overall survival rate was 83.6%, and the 3-year relapse-free survival rate was 50.3%. CONCLUSION: This retrospective study using a small number of subjects suggested that NAC for recurrent colorectal cancer may increase the curative resection rate while reducing the recurrence rate.

[A case of recurrent rectal cancer with idiopathic thrombocytopenic purpura showing rapid progression, suggesting disseminated intravascular coagulopathy].

A 64-year-old female with idiopathic thrombocytopenic purpura(ITP)was admitted to our hospital under the diagnosis of rectal cancer. Intersphincteric resection and splenectomy were performed after high-dose gamma globulin therapy. Thirteen months after the surgery, she suffered from a local recurrence and groin and pelvic lymph node metastases. Radiotherapy was planned before curative resection. During radiation, she complained of severe back pain and high fever with severe thrombocytopenia, and was admitted to our hospital. The examinations revealed disseminated intravascular coagulopathy(DIC), probably induced by multiple bone and hepatic metastases. Although anti-DIC therapy and chemotherapy with FOLFIRI were performed, thrombocytopenia did not improve, and she died of cancer progression about 2 months after admission. We report a case ofDIC induced by cancer progression with ITP. Since thrombocytopenia may be induced by either DIC or ITP, selecting a treatment for such a patient is difficult. We report the present case in detail and discuss findings from the literature.

[Regional treatment of esophageal liver metastasis by intra-arterial low-dose 5-FU therapy].

The prognosis of esophageal liver metastasis remains poor because of the high incidence of synchronous metastasis in other area and insufficient response to systemic chemotherapy. We assessed loco-regional anticancer potential of intra-arterial 5-FU chemotherapy for esophageal liver metastasis aimed at combination with systemic chemotherapy, radiotherapy and ablation therapy as a multidisciplinary treatment. Six patients of esophageal cancer with liver metastasis and without extra-hepatic metastasis were enrolled. Intra-aortic chemotherapy consisted of 5-FU (250 mg/body) in a one-shot infusion or a continuous infusion for 7 days with 2-week intervals until failure. The responses of liver metastasis were 2 cases of CR, 3 of PR and 1 of SD. The response rate and the local control rate were 83% and 100%, respectively. The maximum time to progression was 53 months. Grade 3/4 toxicity was not observed. Two cases had catheter failure and the treatment was interrupted. Liver metastases were controlled well until death in all cases except one. Low-dose intra-aortic 5-FU chemotherapy provided a good regional response and a combination with systemic chemotherapy may prolong survival for the patients of liver metastasis of esophageal cancer.

[Diffusion-weighted MR imaging for postoperative nodal recurrence of esophageal squamous cell cancer in comparison with FDG-PET].

We evaluated the power of DWIBS in patients with postoperative lymph node recurrence of esophageal cancer and compared with FDG-PET findings. Forty-seven suspected lesions by MDCT were enrolled. No significant difference between DWIBS and PET was observed in sensitivity (95% vs 97%), PPV (83% vs 90%) and overall accuracy rate (81% vs 87%). The ADCs (x10(-3) mm2/s) of recurrent nodes, primary cancer and normal esophagus were 1.124, 1.058 and 2.079, respectively. ADCs of recurrent nodes were significantly lower than those of normal esophagus (p<0.0001). The cut-off ADC line of 1.5 revealed 100% overall accuracy for separating the recurrent lesion from normal esophagus. Noninvasive DWIBS may become a valid modality to discriminate nodal recurrence of esophageal cancer by no means inferior to PET.

Usefulness of computed tomography during cholangiography for the diagnosis of multiple hepatic peribiliary cysts: a report of three cases with chronic liver disease.

Hepatic peribiliary cysts are composed of multiple tiny cysts along the larger portal tracts and have been reported to be harmless. On clinical images, peribiliary cysts resemble other diseases such as biliary dilatations, cholangitis, or periportal edema. Therefore, it is important to distinguish peribiliary cysts from these diseases using a combination of several imaging modalities. Herein, we report three cases of peribiliary cysts. The first case underwent laparotomy for the presumptive diagnosis of intrahepatic cholangiocarcinoma. In the remaining two cases, hepatic peribiliary cysts were diagnosed and laparotomy was avoided. Magnetic resonance cholangiography contributed to the diagnosis, owing to their characteristic distribution. In addition, computed tomography during cholangiography (cholangio-CT) demonstrated that the cysts had no communication with the intrahepatic biliary system. Therefore, cholangio-CT is considered to be the most useful modality for the diagnosis of peribiliary cysts.

Anatomy of the middle hepatic vein: applications to living donor liver transplantation.

BACKGROUND/AIMS: In living donor liver transplantation, right lobe graft without a middle hepatic vein (MHV) results in potential venous congestion in the anterior segment, while transplantation with MHV represents an important ethical issue from the perspective of donor safety. The present study assessed ramification patterns of the MHV and relationships between hepatic venous drainage of the anterior and medial segments, to plan optimal harvesting of the right lobe as a graft. METHODOLOGY: The authors reviewed 102 patients with normal livers who underwent contrast-enhanced multi-detector row CT. RESULTS: The hepatic vein that drained S4sup (V4sup) joined only the left hepatic vein (LHV) in 60 patients (58%), only the MHV in 25 (25%), and both LHV and MHV in 17 (17%). Both V4sup and the hepatic vein that drained S8 (V8) joined the MHV in 42 patients (42%), and V8 joined proximal to V4sup in 18 of these 42 patients. CONCLUSIONS: In donation of a right lobe graft including MHV, preservation of V4sup in the remnant donor liver seems possible in most donors.