Yasutaka Yamada

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We investigated the effect of direct gradual lengthening on the proximal nerve stump and subsequent nerve regeneration in rats. A 10-mm-long nerve segment was resected from the sciatic nerve of each rat. The proximal nerve stump was directly lengthened at a rate of 1 mm/day using an original external nerve distraction device. Experiment I: After distraction(More)
We investigated the effects of direct gradual lengthening of the distal stump of a peripheral nerve and subsequent nerve regeneration in rats. A segment 10 mm long was resected from rat sciatic nerve. The distal nerve stump was fixed to a ring and pulled directly at a rate of 1 mm/day using an original external nerve distraction device. After distraction(More)
Long term effect of the growing instability of the bone-implant interface due to bone resorption at the interface is a problem for the implants, including bioactive ceramics. Zn2+ -containing tricalcium phosphate (ZnTCP) is a material which may overcome this problem. The present study aims to clarify whether Zn2+ -containing tricalcium phosphate (ZnTCP)(More)
OBJECTIVES To validate the ability of contemporary active surveillance protocols to predict pathologically insignificant prostate cancer among Asian men undergoing radical prostatectomy. METHODS We retrospectively reviewed data on 132 patients eligible for any active surveillance criteria out of 450 patients that underwent radical prostatectomy at several(More)
A 77-year-old female was indicated pelvic mass and hydronephrosis when her examination of advanced gastric cancer. Computed tomography revealed left ureteral dilatation and mass around the left ureter. Laparotomy biopsy was abandoned because of her low cardiac function. Thereafter, hemorrhagic stool was observed and colonoscopy revealed hemorrhagic mucosal(More)
A 65-year-old man presenting with an esophageal lesion underwent esophagogastroduodenoscopy and computed tomography and an upper esophageal submucosal mass was found. Endoscopic ultrasound-guided fine-needle aspiration led to the diagnosis of mucosa-associated lymphoid tissue lymphoma of the esophagus. Positron emission tomography showed abnormal uptake in(More)
Forestier's disease accompanies difficult airway management with the ossification of the anterior longitudinal ligament of the spine. The abnormalities include limited cervical mobility, constrained epiglottic elevation, exclusion of the part of aryepiglottic, recurrent nerve paralysis and thinning of respiratory tract mucosa. We planned endotracheal(More)
Objective Formerly, locally advanced prostate cancer exhibited poorly prognosis. In the late 1990s, new surgical and radiation technologies were introduced in combination with androgen deprivation. To evaluate respective strategies, outcomes were examined. Patients and methods Between 2001 and 2010, 224 patients with T3N0M0 (10.9% of all prostate cancer(More)
A 74-year-old man was diagnosed with small cell carcinoma arising from the extrahepatic bile duct according to a histological examination of the biopsy specimen obtained during endoscopic retrograde cholangiopancreatography. Additionally, bulky hilar lymphadenopathy was observed, and the patient was treated with the combination of radiation and chemotherapy(More)