Publications by authors named "Kenichiro Arai"

Background: Balloon kyphoplasty (BKP) is a useful treatment performed in patients with painful osteoporotic vertebral body fracture (OVF). However, in cases with large intra-vertebral clefts and cases with posterior spinal tissue damage, adjacent vertebral body fractures (AVFs), and cement migration may occur early after BKP, which may be a factor for poor results. In such cases, percutaneous vertebroplasty (PVP) combined with percutaneous pedicle screw (PPS) is useful treatment.

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Irritable bowel syndrome (IBS) is diagnosed by subjective clinical symptoms. We aimed to establish an objective IBS prediction model based on gut microbiome analyses employing machine learning. We collected fecal samples and clinical data from 85 adult patients who met the Rome III criteria for IBS, as well as from 26 healthy controls.

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Introduction: This study compared traditional manual methods and power tool use with regard to the speed and accuracy of percutaneous pedicle screw (PPS) placement and determined the advantages associated with the use of power tools. Although the indication of PPS placement in minimally invasive spine stabilization (MISt) procedures has been recently expanded, there are no reports on PPS insertion using a power tool.

Methods: We evaluated 35 patients who underwent PPS insertion using a power tool during MISt procedures.

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Purpose: Although successful treatment of squamous cell carcinoma (SCC) of the rectum using chemoradiation therapy (CRT) has been reported, a standard protocol has yet to be established. The aim is to ascertain the effectiveness of CRT with S-1 for three patients with SCC of the rectum.

Case Presentation: We treated three female patients complaining of rectal bleeding.

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Background/aims: KRAS mutation is an important prognostic factor for patients with metastatic colorectal cancer receiving anti-epidermal growth factor receptor therapy. However, the influence of KRAS mutation on the response to mFOLFOX6 ± bevacizumab remains unclear.

Methodology: We retrospectively analyzed 49 patients who received modified FOLFOX6 (mFOLFOX6) ± bevacizumab as first-line therapy.

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Purpose: Although the definitive risk factors for parastomal hernia development remain unclear, potential contributing factors have been reported from Western countries. The aim of this study was to identify the risk factors for parastomal hernia in Japanese patients with permanent colostomies.

Methods: All patients who received abdominoperineal resection or total pelvic exenteration at our institution between December 2004 and December 2011 were reviewed.

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Background: The moment, a force applied at a distance, is responsible for movement and balance. A key component of the moment is the moment arm. The moment arms of nine muscles surrounding the ankle complex during motion in three planes, were studied.

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Unlabelled: We report 5 cases of colorectal liver metastases (CRLM) with hepatic arterial infusion (HAI) oxaliplatin after systemic infusion chemotherapy failure. Patients with unresectable CRLM and history of systemic chemotherapy failure were treated with HAI oxaliplatin (L-OHP 100 mg/body, 2 hours) combined with intravenous (iv) levofolinate calcium (175 mg/body, 2 hours) and iv bolus 5-FU (500 mg/body) every 2 weeks.

Result: An average age was 58 years.

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Volvulus of the large bowel is the third most common cause of colonic obstruction. A patient with colonic obstruction or delayed small intestinal transit may frequently have bacterial overgrowth and increased breath hydrogen (H(2)) and/or methane (CH(4)) excretion because the bacterium can contact with food residues for a longer time. A 39 year old woman attended our hospital with complaints of abdominal pain and distension.

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Background: There is limited information regarding the mechanical factors contributing to the progression of posterior tibial tendon dysfunction. Therefore, an investigation of the mechanical forces on the posterior tibial tendon may improve our understanding of this pathology.

Methods: The gliding resistance and excursion of the posterior tibial tendon in the retromalleolar region was measured in seven cadaveric lower limbs in the coronal, transverse, and sagittal planes.

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