Kohei Takizawa

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BACKGROUND AND STUDY AIM Endoscopic submucosal dissection (ESD) has been reported to be associated with a higher complication rate than standard endoscopic mucosal resection. We aimed to clarify the risk factors for delayed bleeding after ESD for early gastric cancer (EGC). METHODS 1083 EGCs in 968 consecutive patients undergoing ESD during a 4-year(More)
The behavior of early gastric cancer (EGC) with mixed-type histology (differentiated and undifferentiated) is incompletely understood. This study aimed to clarify the clinicopathological features of EGC with mixed-type histology in relation to lymph node (LN) metastasis. Clinicopathological data from 410 patients who underwent surgical resection for(More)
BACKGROUND AND STUDY AIMS Little information exists regarding the optimal treatment of early gastric cancer (EGC) in a remnant stomach or gastric tube. The aim of this study was to assess the feasibility and clinical outcomes of endoscopic submucosal dissection (ESD) for EGC in a remnant stomach and gastric tube. PATIENTS AND METHODS Between September(More)
BACKGROUND AND AIMS The technical difficulties inherent in endoscopic submucosal dissection (ESD) for colorectal neoplasms may result in the failure of en bloc resection or perforation. The aim of this retrospective study was to assess the predictors of en bloc resection failure or perforation by using preoperatively available factors. METHODS Between(More)
This is the first report describing hypertrophic cranial pachymeningitis which developed in association with mixed connective tissue disease (MCTD). A 56-year-old man with a two-year history of MCTD gradually developed symptoms of headache and blurred vision. Bilateral papilledema and increased opening pressure and mild pleocytosis of the cerebrospinal(More)
Although endoscopic submucosal dissection (ESD) of early gastric cancer using an insulation-tipped diathermic (IT) knife enables the removal of large and ulcerative lesions en bloc, expert endoscopic skill is required. We developed an improved IT knife (IT-2) and compared its efficacy and safety with that of the original IT knife (IT-OM). We performed ESD(More)
A preoperative histologic diagnosis of neoplasia is a requirement for endoscopic resection (ER). However, discrepancies may occur between histologic diagnoses based on biopsy specimens versus ER specimens. The aim of this study was to assess the rate of discrepancy between histologic diagnoses from biopsy specimens and ER specimens. A total of 1705 gastric(More)
Because of the low prevalence of non-ampullary duodenal epithelial tumors (NADETs), standardized clinical management of sporadic superficial NADETs, including diagnosis, treatment, and follow-up, has not yet been established. Retrospective studies have revealed certain endoscopic findings suggestive of malignancy. Duodenal adenoma with high-grade dysplasia(More)
BACKGROUND With the widespread use of endoscopic submucosal dissection (ESD), more large early gastric cancers (EGC) have become candidates for endoscopic resection. A precise diagnosis of the extent of cancer is indispensable to obtain R0 resection. The aim of the present study was to clarify the factors related to lateral margin positivity for cancer in(More)
BACKGROUND Bleeding and perforation are two major complications of gastric endoscopic submucosal dissection (ESD). There are only a few reports concerning gastric obstruction related to ESD in the stomach. OBJECTIVE The aim of this study was to clarify the clinicopathological features of patients who experienced gastric obstruction after gastric ESD. (More)