Publications by authors named "Yuichiro Ohtsuka"

Article Synopsis
  • EUS-guided biliary drainage (EUS-BD) has shown good results in high-volume centers, but this study investigates its safety and effectiveness in newer centers that recently adopted the procedure.
  • The research involved 22 centers from 2017 to 2022, assessing 255 patients and looking at the success and complications of EUS-BD performed by 84 endoscopists.
  • The study found a high technical success rate of 91.4% but identified specific risks for failure and complications, including smaller puncture target diameters and moderate ascites, highlighting that the experience level of endoscopists did not significantly affect outcomes.
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Fine-needle aspiration cytology (FNAC) is considered a safe procedure, but it causes massive neck swelling and airway obstruction rarely. Neck swelling after FNAC is caused by two mechanisms: by hematoma or by release of vasodilator substances in thyroid cells and nerve terminals. The latter condition was previously reported as an acute and frightening swelling of the thyroid, but is not named appropriately.

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Calcific retropharyngeal tendinitis/retropharyngeal calcific tendinitis is an inflammation of the longus colli muscle caused by calcium hydroxyapatite crystal depositon in the longus colli muscle tendon. The three major symptoms are neck pain, limitations of neck movement, and swallowing pain. We treated 8 cases of calcific retropharyngeal tendinitis/ retropharyngeal calcific tendinitis.

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Bcl6-deficient (Bcl6-/-) mice displayed Th2 type inflammation, which caused by abnormality of non-lymphoid cells. However, initiators for the Th2 type inflammation were not clear. In order to elucidate the initiators, we investigated property and function of mast cells derived from Bcl6-/- mice.

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