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Background Chylothorax after thoracic surgery is a rare but severe complication. When thoracic duct ligation is performed for chylothorax, identification of the leakage site and the thoracic duct course is necessary. Administering milk orally or through a nasogastric tube and injecting indocyanine green into lymph nodes and lymphatic vessels can be performed to identify the leakage site and the thoracic duct course. However, the injection of patent blue V into the inguinal lymph nodes has not been reported. Case presentation A 69-year-old man underwent aortic replacement surgery for an aortic aneurysm of the distal arch. On postoperative day 3, after resuming oral intake, the patient was diagnosed with chylothorax. The patient was treated with fasting and total parenteral nutrition, but the chylous pleural effusion continued at 500–1000 ml daily. A plan for thoracic duct ligation was made. We injected patent blue V into the inguinal lymph node to identify the leakage site and the thoracic duct course. The blue-stained thoracic duct was identified and ligated, but the leakage site could not be identified because of the surrounding lung adhesions. The thoracic drain was removed on day 6 post-second operation, and the chylothorax did not recur. Conclusion Identifying the thoracic duct course using patent blue V is useful during thoracic duct ligation for chylothorax.

To determine the image quality improvement including vascular structures using deep learning reconstruction (DLR) for ultra-high-resolution CT (UHR-CT) and area-detector CT (ADCT) compared to a commercially available hybrid-iterative reconstruction (IR) method. Thirty-two patients suspected of renal cell carcinoma underwent dynamic contrast-enhanced (CE) CT using UHR-CT or ADCT systems. CT value and contrast-to-noise ratio (CNR) on each CT dataset were assessed with region of interest (ROI) measurements. For qualitative assessment of improvement for vascular structure visualization, each artery was assessed using a 5-point scale. To determine the utility of DLR, CT values and CNRs were compared among all UHR-CT data by means of ANOVA followed by Bonferroni post hoc test, and same values on ADCT data were also compared between hybrid IR and DLR methods by paired t test. For all arteries except the aorta, the CT value and CNR of the DLR method were significantly higher compared to those of the hybrid-type IR method in both CT systems reconstructed as 512 or 1024 matrixes (p

Due to the demand for miniaturization, further improvement in cooling performance is required for power modules. The spiral-fin heatsink we considered has higher cooling performance than conventional ones. In this paper, we examined the design parameters of the spiral-fin, and found that three parameters of spiral-fin have big effect for the Cooling performance.

In recent years, SiC power modules have attracted a lot of attention because they offer higher frequency and density as compared to the conventional Si power module. However high speed switching inevitably lead to the generation of surge voltage which may damage the power module. The design of layout, which composed of copper patterns, power semiconductors and terminals, is one of the factors that is necessary to overcome the problem. In this paper, the layout design of the half-bridge power module is optimized to reduce its internal inductance. The inductance was evaluated by electromagnetic field simulation.

Pulmonary artery (PA) sling is a congenital disease in which the left PA abnormally arises from the right PA and is usually diagnosed during the infantile period. We present an adult case of PA sling accompanied by tracheobronchomalacia found in a 49-year-old woman with a history of recurrent pneumonia. Computed tomography of the chest showed that the left lung was nourished by two aberrant PAs. Bronchoscopy demonstrated achondroplasia of the trachea and the right bronchus, which we speculate to have resulted in their stenosis. The recurrent pneumonia was attributable to these tracheobronchial structural abnormalities; we therefore stress the importance of focusing on the anatomic abnormalities in such cases.

Purpose Diffusional kurtosis metrics show high performance for detecting pathological changes and are therefore expected to be disease biomarkers. Kurtosis maps, however, tend to be noisy. The maps' visual quality is crucial for disease diagnosis, even when kurtosis is being used quantitatively. A Bayesian method was proposed to curtail the large statistical error inherent in kurtosis estimation while maintaining potential application to biomarkers. Theory Gaussian priors are determined from first-step estimations implemented using the least-square method (LSM). The likelihood-function variance is determined from the residuals of the estimation. Although the proposed approach is similar to a regularized LSM, regularization parameters do not have to be artificially adjusted. An appropriate balance between denoising and preventing false shrinkages of metric dispersions is automatically achieved. Methods Map qualities achieved using the conventional and proposed methods were compared. The receiver-operating characteristic analysis was performed for glioma-grade differentiation using simulated low- and high-grade glioma DWI datasets. Noninferiority of the proposed method was tested for areas under the curves (AUCs). Results The noisier the conventional maps, the better the proposed Bayesian method improved them. Noninferiority of the proposed method was confirmed by AUC tests for all kurtosis-related metrics. Superiority of the proposed method was also established for several metrics. Conclusions The proposed approach improved noisy kurtosis maps while maintaining their performances as biomarkers without increasing data acquisition requirements or arbitrarily choosing LSM regularization parameters. This approach may enable the use of higher-order terms in diffusional kurtosis imaging (DKI) fitting functions by suppressing overfitting, thereby improving the DKI-estimation accuracy.

Unilateral spatial neglect (USN) is a higher cognitive dysfunction that can occur after a stroke. It is defined as an impairment in finding, reporting, reacting to, and directing stimuli opposite the damaged side of the brain. We have proposed a system to identify neglected regions in USN patients in three dimensions using three-dimensional virtual reality. The objectives of this study are twofold: first, to propose a system for numerically identifying the neglected regions using an object detection task in a virtual space, and second, to compare the neglected regions during object detection when the patient's neck is immobilized (‘fixed-neck’ condition) versus when the neck can be freely moved to search (‘free-neck’ condition). We performed the test using an immersive virtual reality system, once with the patient's neck fixed and once with the patient's neck free to move. Comparing the results of the study in two patients, we found that the neglected areas were similar in the fixed-neck condition. However, in the free-neck condition, one patient's neglect improved while the other patient’s neglect worsened. These results suggest that exploratory ability affects the symptoms of USN and is crucial for clinical evaluation of USN patients.

Background Unilateral spatial neglect (USN) is defined as impaired attention to sensory stimuli on one side. The symptoms can exist for near and far spaces combined or independently. Thus, it is important to evaluate both possibilities in a clinical environment. Objective To develop a tractable immersive virtual reality (iVR) system that can evaluate both near and far space neglect along with a proof of concept study to determine whether near and far spatial neglect could be described in an actual patient with USN. Methods An object-detecting task was developed in a three-dimensional virtual reality space. The examiner recorded the positional data of objects that were recognized by the patient with USN using coordinate data. Results The system could be used to detect near and far space neglects in a patient with USN. No side effects such as vertigo were seen during measurement. This patient showed that the angle for recognition was significantly larger for near space than far space, and exhibited a tendency for the angle of recognition to increase with lower height. Conclusions Our proof of concept study indicated the possibility of applying an evaluation system that separates far and near space neglect using iVR.

The patient was a 78-year-old man who had undergone left lung segmentectomy (S6) with lymph node dissection for lung adenocarcinoma. One year and 5 months later, lung partial resection was performed for the lung cancer recurrence and the hematemesis was noted on the next day of surgery. Upper gastrointestinal endoscopy revealed extensive black necrosis on the mucosa of the esophagus, which was diagnosed as acute necrotizing esophagitis. To treat the bleeding, the exposed esophageal vessels were clipped via endoscopy several times. The endoscopy on the 64th post-operative day showed the mucosa recovered and he could be discharged on the 85th day. The exact etiology of acute necrotizing esophagitis is unknown in most cases.

Radiological finding of pulmonary metastasis of thyroid cancer is generally known to be multiple small nodular shadow. We experienced 2 cases of lung solitary tumor, which were suspected of primary lung cancer as differential diagnosis. Patient 1:A 67-year-old man;the tumor obstructed subsegmental bronchus (B10) of the right lobe, and pathological diagnosis by transbronchial biopsy was adeno-squamous carcinoma. Fluoro-2-deoxy-D-glucose (FDG) positron emission tomography (PET) showed abnormal uptake in the tumor and also in the left lobe of his thyroid gland, but no malignant findings were found by the fine-needle aspiration cytology from the thyroid gland. Patient 2:A 51-year-old woman;she had a lobulated nodule in the left lower lobe, which was diagnosed as adenocarcinoma. She had undergone an operation for thyroid cancer about 30 years earlier, but after the operation, there has been no recurrence. In both cases, primary lung cancer were suspected and the tumors were resected surgically. By immunohistochemistry, both tumors were diagnosed as pulmonary metastases from papillary thyroid carcinoma.

In recent years, there have been increasing the number of power modules which is required with high performance, miniaturization and weight saving. But these requires cause high heat generation density for power module, which gets junction operation temperature to rise. Cooling unit is thus greatly demanded for high heat dissipation. The simple shaped heatsinks (straight-fin type and pin fin type) were generally used. But they have the limit of cooling performance. In this report, we have developed new heatsink shape to cope with rapidly increasing of the cooling requirement. Cooling performance is shown to thermal resistance and pressure loss. We evaluated them by thermal fluid analysis. In this approach, the spiral-fin heatsink with spiral curved channels has excellent cooling performance. This shape is the unique point in this report. This is because the shape with three-dimensional regular curve has not been studied. The spiral-fin heatsink has many factors (fin thickness, fin pitch, the number of channels, etc.). These factors affect cooler performance. We changed these factors to determine the best shape of spiral-fin. As a result, the best shape is 14.9[%] lower than the straight-fin type in thermal resistance.

As recent power modules with utmost performance are required in small and light-weight structures, the design and the manufacturing of heat sinks that offer maximal cooling performance have become a challenge due to continuously evolving miniaturization and smaller cooling areas. In line of the above, and for practical realizations, heat sinks having the ability to operate in limited volume, as well as having simple geometry are highly desirable due to existing limitations in cooling area and machining processes. We propose a methodology to design heat sinks that aim at minimizing temperature and pressure loss based on fin considerations, as well as design of experiments and response surfaces of objective functions about design variables. Numerical simulations and sensitivity analyses based on Finite Element Method have shown the improved cooling performance in terms of thermal resistance when compared to the conventional heat sinks with straight fins. The unique point of our proposed approach lies not only in the simplicity of the geometry of the heat sink, but also in the higher cooling performance, which is key to realize enhanced cooling mechanisms by existing metal-based 3D printers. We believe our approach offers the building blocks to enable the design and realization of heat sinks with manufacturable geometry and utmost cooling performance. As such, our proposed approach has the potential to capitalize on the benefits of metal-based 3D printing technologies, enabling the possibility to realize challenging geometries.

Objectives This investigation was conducted to assess the use of the intratumoral mRNA expression levels of nucleic acid-metabolizing enzymes as biomarkers of adjuvant chemotherapy for non-small cell lung cancer (NSCLC) using uracil-tegafur in a multi-institutional prospective study. Materials and methods 236 patients with a completely resected NSCLC (adenocarcinoma and squamous cell carcinoma) of pathological stage IA (maximum tumor diameter of 2 cm or greater), IB, and II tumors were given a dose of 250 mg of uracil-tegafur per square meter of body surface area per day orally for two years after surgery. Intratumoral mRNA levels of thymidylate synthase (TS), dihydropyrimidine dehydrogenase (DPD), orotate phosphoribosyltransferase (OPRT), and thymidine phosphorylase (TP) genes relative to an internal standard, β-actin, were determined using laser-capture microdissection and fluorescence-based real time PCR detection systems. Results and conclusion Among 5-FU target enzymes, TS was the only one that showed a significant difference in the level of gene expression between the high and low gene expression groups, for both disease-free survival (DFS) and overall survival (OS), when patients were divided according to median values; 5-year DFS rates in high/low TS gene expression were 60.4% and 72.6%, respectively (p = 0.050), 5-year OS rates were 78.1% and 88.6%, respectively (p = 0.011). Cox's proportional hazard model indicated that the pathological stage and TS gene expression level were independent values for predicting DFS. The TS gene expression level was shown to be an independent predictive factor for DFS in stage I and II NSCLC patients who were treated with uracil-tegafur following surgery.

The use of compact magnetic resonance (MR) systems for the neuroimaging of small animals is spreading. We investigated the potential of such systems in functional MR imaging (fMRI) of somatosensory cortex activity elicited by forepaw stimulation in medetomidine-sedated rats. Using a 1.5-tesla compact imager, we detected maximum activity with an electrophysiologically optimized frequency of 9 Hz in 3 appropriately sedated rats. With this compact system, we successfully mapped neural activity by combining optimum stimulation for a large hemodynamic response with appropriate anesthesia, thus demonstrating the utility of such systems in hemodynamic-based fMRI in preclinical and translational research.

Purpose: The efficacy and safety of percutaneous transhepatic portal embolization (PTPE) with dehydrated ethanol was determined by measuring the liver lobe volume before and after the procedure. Materials and Methods: A total of 38 patients (25 men, 13 women; mean age: 62.0 ± 10.8 years) who underwent PTPE with dehydrated ethanol between April 2005 and March 2011 participated in this study. Dehydrated ethanol containing 17% lipiodol was injected into the target portal vein branch under balloon occlusion, and the portal vein was subsequently embolized. The liver lobe volume was measured via contrast-enhanced computed tomography, and the percent increase in the unembolized lobe volume was then calculated. In addition, PTPE-related complications were surveyed, and the procedural safety was evaluated. Results: The mean percent increase in the unembolized lobe volume after PTPE was 33.8% ± 20.2%. The procedure could not be completed in one patient because of an insufficient increase in the unembolized lobe volume. No serious post- PTPE complications were observed. Conclusion: These data suggest that PTPE with dehydrated ethanol is a safe and effective method for enlarging the planned residual liver volume before extensive liver resection.

Swallowing computed tomography (SCT) is a relatively new technique for the morphological and kinematic analyses of swallowing. However, no optimal scan protocols are available till date. We conducted the present SCT study to estimate the patient dose at various patient reclining positions. A RANDO phantom with a thermoluminescent dosemeter was placed on a hard Table board in a semi-reclining position at the centre and off-centre. According to predetermined scan protocols, irradiation was performed to acquire scanograms at reclining angles of 55° and 65°. The effective dose was the lowest at the centre 45° (3.8 mSv) reclining angle. Comparison between the off-centre (4.6 mSv at 55°, 6.8 mSv at 65°) and centre (4.5 mSv, 5.8 mSv) values suggested that the off-centre position is undesirable with regard to the patient dose. Accordingly, we believe that SCT methods must be revised on the basis of these factors.

When performing endovascular aortic repair (EVAR) procedures, clinicians sometimes encounter cases in which the indications for EVAR are beyond the instruction for use (IFU). In EVAR, proximal neck fixation is the most important factor. This report describes several techniques and tips for EVAR in cases presenting with a difficult short neck or angled neck, especially when using the Gore Excluder®. Endo-wedge techniques (EWT), including non-sheath-assisted EWT with sheath-assisted strategies, are presented. We describe the scrum technique, which is a special procedure that is only feasible when using the Gore Excluder®. In this technique, intentional wire bending around the proximal neck portion occurs by pushing from both sides of the guidewire. This technique is applicable in cases with a sharply angled neck. The scrum with EWT is a more precise strategy for cases with a short or angled neck. Other troublesome cases include limb occlusion caused by weak points in the Gore Excluder® body and legs. The very rare complication of stent-graft collapse is also reviewed.

We investigated the postoperative mortality and long-term survival of lung cancer patients with underlying idiopathic pulmonary fibrosis (IPF).The data of 387 primary lung cancer patients treated by surgical resection at our hospital between 1995 and 2008 were retrospectively reviewed. Clinicopathological characteristics such as age, gender, survival, presence/absence of underlying IPF, atypical adenomatous hyperplasia (AAH), and the associations among these factors were examined.Among the 387 patients, 65 (16.8 %) had underlying IPF as detected by histopathology of the resected specimen (IPF group). The percentages of men and squamous cell carcinomas were significantly higher in the IPF group. None of our patients showed concomitant presence of AAH and IPF. Four of the 65 patients showed acute exacerbation of the IPF postoperatively, and all 4 of these patients died in hospital. In patients with non-small cell lung carcinoma, the postoperative survival tended to be lower in the IPF group than in the non-IPF group. Analysis using a Cox proportional hazards model by disease stage revealed that presence of underlying IPF was a risk factor for postoperative mortality in patients with pathological stage I/II but not for stage III/IV. Respiratory failure was the second main cause of death in the stage I/II lung cancer patients of the IPF group.Histopathological evidence of IPF was a risk factor for postoperative mortality and poor long-term survival, especially in patients with stage I/II non-small cell lung cancer, with postoperative respiratory failure representing the major cause of death.

Adequate dose management during computed tomography is important. In the present study, the dosimetric application software ImPACT was added to a functional calculator of the size-specific dose estimate and was part of the scan settings for the auto exposure control (AEC) technique. This study aimed to assess the practicality and accuracy of the modified ImPACT software for dose estimation. We compared the conversion factors identified by the software with the values reported by the American Association of Physicists in Medicine Task Group 204, and we noted similar results. Moreover, doses were calculated with the AEC technique and a fixed-tube current of 200 mA for the chest-pelvis region. The modified ImPACT software could estimate each organ dose, which was based on the modulated tube current. The ability to perform beneficial modifications indicates the flexibility of the ImPACT software. The ImPACT software can be further modified for estimation of other doses.

Mycobacterium chelonae lung infection is rare and has long been recognized as an enigmatic infection resistant to medical therapy. Recently, we encountered a patient who underwent pulmonary resection for Mycobacterium chelonae infection. A 46-year-old man with no medical history was found to have an abnormal shadow in the left upper lung field on chest X-ray. Computed tomography showed a nodular shadow in the left upper lobe and disseminated shadows around it. Mycobacterium chelonae was detected from cultures of the sputum, bronchial washings, bronchoscopic biopsy specimens, and gastric fluid, and pulmonary infection with Mycobacterium chelonae was diagnosed. The shadow did not decrease in size despite antibiotic treatment. Since the lesion was confined to the left upper segment, we judged that a complete resection was possible, and performed left upper division segmentectomy. After surgery, no new foci of infection were observed in the lung. No effective therapy for Mycobacterium chelonae lung infection has been established to date, and reported cases of pulmonary resection for the treatment of Mycobacterium chelonae infection are extremely rare. However, surgery should be considered in patients in whom complete resection is deemed possible.

Lung cancer metastases to the prostate are uncommon, and are usually found incidentally during autopsy. This case report describes a 77-year-old man with a large cell neuroendocrine carcinoma (LCNEC) of the lung and metastases from this primary cancer in the prostate. During the follow-up after the chemotherapy performed for pulmonary LCNEC, pelvic computed tomography revealed a prostatic tumor and prostatic needle biopsy was performed. Histologically, the tumor was identified as LCNEC, forming a tissue architecture closely resembling the previously diagnosed lung cancer. The tumor cells were immunohistochemically positive for thyroid transcription factor-1. These findings led to a diagnosis of prostatic metastasis of pulmonary LCNEC.

A 44-year-old woman underwent surgery for lung cancer. Although preoperative computed tomography did not reveal a tiny nodule, pathological examination of the background lung showed that type II pneumocyte-like tumor cells grew papillary in an area of approximately 2.3 × 1.2 mm. This lesion exhibited hemorrhage, hemosiderosis, calcification, and varying degrees of fibrosis, leading to the diagnosis of sclerosing hemangioma. This is the first reported case of microscopic sclerosing hemangioma undetectable by chest computed tomography.

黄色肉芽腫性胆嚢炎（Xanthogranulomatous cholecystitis；以下，XGCと略記）は，進行胆嚢癌との鑑別が困難で胆嚢癌と診断された場合，過大手術を施行されることが多く正確な術前診断が重要である．我々の施設では，XGCと進行胆嚢癌の術前鑑別診断に一般的な画像検査に加え，多列検出器CTとカラードプラ断層法による胆嚢壁血流測定を用いている．多列検出器CTでは，XGCの特徴的な所見である胆嚢粘膜の連続性の保持や胆嚢壁内の微細なLow density spotの描出が認められ，これらの所見は進行胆嚢癌には認められないことから鑑別に有用であった．またカラードプラ断層法による胆嚢壁血流測定では，いずれのXGC症例においても胆嚢壁血流の最高流速は進行胆嚢癌と同等の高値を示した．胆嚢壁血管抵抗はXGCでは正常胆嚢と同等の低値であったのに対し，胆嚢癌症例では有意に高値で鑑別診断に有用であった．

Pulmonary metastasis from carcinoma of the papilla of Vater is considered to be a late event, and patients can be treated with radiotherapy, chemotherapy, or palliative surgery. However, surgical treatment of an isolated lung metastasis has not been reported. We present a surgical case of solitary pulmonary metastasis from carcinoma of the papilla of Vater. A 51-year-old man underwent pylorus-preserving pancreaticoduodenectomy for Vater carcinoma. During follow-up, chest computed tomography revealed a nodular shadow in the right lung. The pathological examination demonstrated the appearance of the pulmonary tumor resembled that of the previously resected Vater carcinoma, and both tumors showed similar immunostaining properties, leading to the pathological diagnosis of pulmonary metastasis from carcinoma of the papilla of Vater. Isolated pulmonary metastasis from carcinoma of the papilla of Vater is extremely rare, but surgery could be the treatment of choice.

Reports of cavitary lung cancer are not uncommon, and the cavity generally contains either dilated bronchi or cancer cells. Recently, we encountered a surgical case of cavitary lung cancer whose cavity tended to enlarge during long-term follow-up, and was found to be lined with normal bronchial epithelium and adenocarcinoma cells.

症例は88歳男性．2006年健診で異常陰影を認め精査目的に当科を受診した．胸部CTで右上葉末梢，右肺門部と左上葉に結節影を認めた．気管支鏡で，右上葉末梢病変は非小細胞癌と診断した．FDG-PET検査で各結節影に一致して集積を認めた．右肺癌cT1bN1M0および左肺癌cT1bN0M0の重複癌と診断し，まず右上葉切除＋リンパ節郭清を，3週後に胸腔鏡下左肺部分切除を施行した．リンパ節転移と考えていた右肺門部の結節は，原発性肺癌であり，3病変はすべて異なる組織型で，それぞれp-I A期であった．術後3年7ヵ月経過した現在再発を認めていない．同時性肺三重癌で組織型がすべて異なる症例は稀である．また高齢者三重癌に対して手術を2期的に施行し，良好な結果が得られた症例は今までに報告されていない．今回われわれは，同時性肺三重癌の一切除例を経験したので文献的考察を加え報告する．

When a pancreatoduodenectomy is to be conducted, preoperative understanding of the vascular anatomy of the pancreatic head is important in order to reduce intraoperative bleeding. Using multislice computed tomography (MS-CT), we investigated the depiction rate and branching of the inferior pancreaticoduodenal artery (IPDA) and dorsal pancreatic artery (DPA), afferent arteries to the pancreatic head.In 109 patients (68 with pancreatic cancer, 21 with biliary tract cancer, 15 with intraductal papillary mucinous tumor of the pancreas, and 5 others), images were taken, using 64-row MS-CT, in the early and late arterial phases.The depiction rates were 98.2% for the IPDA and 96.3% for the DPA. Branching of the IPDA was categorized into three types: a type in which the IPDA formed a common vessel with the first jejunal branch (72.0%), a type in which the IPDA branched directly from the superior mesenteric artery (18.7%), and a type in which the anterior inferior pancreaticoduodenal artery (AIPDA) and posterior inferior pancreaticoduodenal artery (PIPDA) branched separately (9.3%). DPA branching was categorized into five types, in which the DPA branched from the splenic artery (40.0%), from the common hepatic artery (25.7%), from the superior mesenteric artery (20.0%), and from the celiac artery (8.6%), and a type in which the DPA branching did not follow any of the above patterns (5.7%).MS-CT images of vascular architecture enable evaluation from any angle, which is not possible with conventional angiography, making MS-CT a useful diagnostic imaging technique for understanding the vascular anatomy of the pancreatic head prior to conducting pancreatoduodenectomy for diseases of the pancreatic head region.

Pancreatoduodenectomy (PD) is one of the most difficult operations in gastrointestinal surgery. Standard PD ligates and cuts superior mesenteric vein (SMV) branches after the removal of the pancreas head, which leads to congestion and bleeding of these veins. In this study, we modified the standard PD and first ligated the efferent vessels (arteries); namely, the gastroduodenal artery and inferior pancreatoduodenal artery (IPDA), before ligating and cutting the corresponding afferent vessels (veins) of the pancreas head. By doing this, congestion of these veins was relieved and bleeding from the resected surface was substantially prevented. Thirty-six patients (18 underwent standard PD and 18 had modified PD) formed the study population. The amount of bleeding in the modified PD group was significantly lower than that in the standard PD group. (678 ± 329 g vs 1225 ± 375 g, respectively; P < 0.05) However, no difference in operation time was found between the two groups. We believe this modified PD procedure is valuable to enable the safe performance of PD.

Although intraarterial steroid infusion therapy has previously been shown to be effective for inflammatory bowel disease, it has not yet been applied for the treatment of hemorrhagic radiation gastritis. We report herein a case of hemorrhagic radiation gastritis of gastric tube that occurred after chemoradiation therapy for postoperative peritoneal lymph node metastasis in a patient with esophageal carcinoma who had a history of esophagectomy reconstructed with a gastric tube. The hemorrhagic gastritis that occurred in the gastric tube was successfully treated with repeated intraarterial steroid infusions through the regional vessels to the reconstructed gastric tube. A 70-year-old Japanese woman received chemoradiation therapy for metastatic lymph nodes of the celiac axis. Four weeks after completion of chemoradiation therapy, acute persistent bleeding occurred in the gastric mucosa of the reconstructed gastric tube in the irradiated area. Despite application of available therapeutic modalities, her persistent bleeding was intractable, and a total of 50 units of blood transfusion was required to improve progressive anemia. Finally, intraarterial steroid infusion therapy was applied through the right gastroepiploic artery supplying the main blood flow to the gastric tube. Three repeated intraarterial steroid infusions through the right gastroepiploic artery were effective, and hemostasis was finally completed soon after the last dose of intraarterial steroid was given. This case highlights the clinical importance and significance of hemorrhagic radiation gastritis of the reconstructed gastric tube with posterior mediastinal route occurring after chemoradiation therapy. Repeated intraarterial steroid infusion could be one option that appears clinically useful to treat intractable bleeding from radiation gastritis.

In vitro protein phosphorylation in soluble fractions (85,000×g supernatant) prepared from carrot hairy roots, which were induced by inoculation with Agrobacterium rhizogenes harboring the Ri plasmid, was analyzed by SDS-PAGE and autoradiography. The autoradiograms indicated that at least four proteins, with molecular masses of 65, 57.5, 52, and 38 kDa, were phosphorylated. The presence of Ca2+ enhanced the phosphorylation of the 65, 57.5, and 52 kDa proteins, but the presence of both Ca2+ and calmodulin did not enhance phosphorylation as much as Ca2+ alone. W-7 strongly inhibited the phosphorylation of the 65, 57.5, and 52 kDa proteins while W-5 mildly inhibited the phosphorylation of these proteins. The extent of phosphorylation of these proteins and the growth rate of the hairy roots became higher with increasing incubation temperature. W-7 had a considerable inhibitory effect on the growth of hairy roots, W-5 had a weak inhibitory effect on the growth of the roots, and a high concentration of TMB-8 inhibited growth. These results suggest that the 65, 57.5, and 52 kDa proteins are phosphorylated by CDPK and that the phosphorylation is connected with the increase in growth of carrot hairy roots.

We present some simple but useful properties of factor oracles, and propose fast algorithms for indexed full-text search and finding repeated substrings. Some experiments are given to demonstrate the performance of our algorithms.

患者は70歳の男性. 健診で胸部CT上異常陰影を指摘され紹介入院となった. 胸部CTで後縦隔に気管分岐部を上縁とする長径6.5cm大の境界明瞭, 内部やや不均一な腫瘤性病変を認め, 胸椎, 食道, および下行大動脈と接していた. 後縦隔原発の腫瘍を疑い腫瘍摘出術を施行した. 胸腔鏡下に手術を開始した. 腫瘤は表面平滑, 弾性硬で, 下行大動脈および食道への浸潤はなく容易に剥離できたが, 胸椎前面に強く固定していた. 胸腔鏡下の剥離は困難と考え開胸下に摘出した. 病理標本では紡錘形細胞, 胞体の広い多角形細胞, および多形細胞など多彩な細胞が混在する所見が得られ, 免疫組織化学ではsmooth muscle actin (-), Desmin (focally +), α1-antitripsin (+) な多形細胞も認められたが, 紡錘形細胞や多角形細胞など大多数はα-smooth muscle actin (+), desmin (+), myoglobin (-), S-100 (-) であることから低分化な多形性平滑筋肉腫と診断した. 縦隔原発の平滑筋肉腫は検索しえた限り, 本邦で15例目であり稀な疾患であると考えられた.

胸腔内脂肪肉腫の一切除例を経験したので報告する.患者は30歳産褥婦.妊娠7ヵ月目頃より高度な咳噺, 胸痛, 呼吸苦が出現.出産後胸部X線およびCT検査で左胸腔内をほぼ占拠する腫瘤影を認めた.吸引細胞診, 針生検で脂肪肉腫と診断.腫瘍摘出術およびCDDP (1mg/kg), ADM (1mg/kg) を用いた胸腔内温熱灌流療法を施行した.切除標本の病理組織検査で胸腔内原発の多形型脂肪肉腫と診断した.術後胸腔内再発に対して放射線照射を施行したが, 急速に増大する局所再発により, 術後5ヵ月で腫瘍死した.胸腔内脂肪肉腫は検索し得た限り, 13例の英文報告例があるのみで稀な疾患と考えられた.

Pulmonary sequestration describes a rare congenital mass of nonfunctional pulmonary tissue with an aberrant systemic arterial supply. Conventionally, the mass is removed surgically, but this carries a risk of serious and potentially fatal hemorrhage from the aberrant arteries during the operation. We describe how we performed coil embolization of the aberrant arteries immediately before surgery to overcome this problem. Coil embolization is safe, feasible and effective in preventing intraoperative bleeding. This case is reported to introduce a new preoperative procedure for pulmonary sequestration.

血管腫瘍は易出血性で組織診断が困難なことが多く, また術中に大量出血を来たすことが多い. 著者らは非常に稀な会陰部の胞巣状軟部肉腫に対し, マルチスライスCTによる3D-angiographyが手術進行に有用であったので報告する. 症例は31歳の男性で, 排便時肛門痛と出血を主訴に近医を受診し, 生検にて血管肉腫を疑われ来院した. マルチスライスCTの多断面再構成像および3D-angiographyにより, 肛門管に隣接する腫瘍と診断した. 術中出血を考慮し, 術前に栄養血管塞栓術を行ない, 術前の画像所見を参考にしつつ肛門括約筋部分切除を伴う腫瘍切除術と肛門括約筋形成術を施行した. 塞栓術と画像所見による良好なオリエンテーションにより出血量も少量であった. 病理組織診断は胞巣状軟部肉腫であった. 周囲組織への浸潤もなく, surgical marginもfreeであったため, 厳重な経過観察とした. 術後は軽度の肛門痛と肛門狭窄を認めたが経過は良好であった.

T-tube insertion is effective treatment for subglottic stenosis, but it is generally difficult due to bending of the T-tube. In a 52-year-old woman with relapsing polychondritis, a T-tube was inserted after predilatation using Hegar dilators. We describe the details of our T-tube insertion methods for sclerotic subglottic stenosis.

The electron mobilities, μe, and electron-ion recombination rate constants, kr, in dense gaseous Ar and Kr with a small amount of N2 or CH4 as a molecular impurity have been measured as a function of electric field strength using a pulse radiolysis dc-conductivity method combined with a new decay-curve analysis method in which a space-charge effect is taken into account to obtain more accurate values of kr. The energy of electrons in recombination is controlled experimentally in two ways; one is heating-up by the electric field and the other is cooling-down by inelastic collisions with additive molecules. A large deviation of kr from the Debye theory obtained in the present experiment has been discussed in terms of the electron mean free paths and electron energies based on recent theories.

仙尾部奇形腫は新生児期に発見され手術されることが多く,成人例は稀である.われわれは手術体位や到達法の選択において,嚢胞造影併用ヘリカルCTの多断面再構成像(MPR)及び三次元像(3D)が有用であった成人仙尾部成熟型奇形腫の1例を経験したので報告する.症例は52歳の男性で,殿部の圧迫感を主訴に受診した.注腸,MRIなどの検査所見により仙尾部嚢胞性腫瘍と診断した.術前施行した嚢胞造影併用ヘリカルCTのMPRにて任意の断面にて腫瘍及び周囲臓器を観察,3Dにて仙尾骨及び骨盤との関係をシュミレーションし,体位,到達法を決定した.体位はjack-knife位とし経仙骨的に腫瘍及び尾骨と第5仙椎を摘出したが,容易に,確実に手術が訂能であった.患者は術後,排便排尿機能障害を呈することもなく良好に経過した.

会陰部血管腫は報告例も少なく,非常に稀な疾患である.著者らは陰茎・陰嚢皮下,会陰部肛門周囲から直腸周囲骨盤腔内におよぶ広範な血管腫に対し,各種画像診断をもとに保存的治療を選択した症例を経験したので,若干の文献的考察を加えて報告する.症例は18歳の男性で,主訴は肛門痛,排便時出血,高熱であった.出生時より会陰部に赤褐色の小腫瘤を認め,小児期より週に1度程度の割合で排便時の激痛,出血と高熱を呈し,近医にて抗生物質の内服薬を投与され軽快していた.5歳時に会陰部の血管腫の治療を受けたが,治療後も徐々に会陰部の腫瘤は増大し,主訴が持続するため紹介入院となった.各種画像所見にて完全摘出が困難な広範囲な会陰部血管腫と診断した.年齢および社会的背景を考慮して,保存的加療を行った.現在症状は消失している.広範な会陰部血管腫は稀であるが,不容易な治療は不幸な転帰を招来する可能性があり,治療法の選択は慎重に行うべきだと考えられた.