Publications by authors named "Aiko Shimizu"

Middle-ear salivary gland choristoma (SGCh) is a rare, benign tumor that causes conductive hearing loss owing to middle-ear morphological abnormalities. Early diagnosis is challenging, and surgical resection is indispensable for a definitive diagnosis. We report the case of a 3-year-old boy diagnosed with middle-ear SGCh during the follow-up period for left-sided hearing loss discovered at newborn hearing screening (NHS).

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Article Synopsis
  • A 71-year-old man with diabetes experienced headaches and altered consciousness, leading to the discovery of a pneumocephalus caused by an inverted papilloma in the frontoethmoidal sinus.
  • He underwent a simultaneous endoscopic and transcranial surgery using an advanced ORBEYE exoscope, which allowed for effective treatment.
  • Post-surgery, the patient's symptoms improved, and there was a notable decrease in the elevated squamous cell carcinoma antigen level, highlighting the need for teamwork and modern techniques in tackling complex sinus issues.
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We report a challenging and uncommon case involving a 53-year-old Japanese man with cerebrospinal fluid (CSF) leakage caused by a meningocele in the lateral recess of the sphenoid sinus. Our innovative treatment approach involved a combination of transpterygoid and endoscopic modified medial maxillectomy techniques, with special emphasis on the preservation of the sphenopalatine artery. This strategic preservation was pivotal to the successful use of the ipsilateral nasoseptal flap for reconstruction, which played a crucial role in the prevention of postoperative CSF leakage.

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Background: In 2013, Japan established a standardized classification system for categorizing endoscopic sinus surgery (ESS) into types I-V, yet no evaluation has been conducted thereof.

Objective: We assessed the ESS trends and status in Japan, focusing on outpatient and inpatient surgeries.

Material And Methods: This descriptive retrospective cohort study used Japan's National Database of Health Insurance Claims and Specific Health Checkups between 2014 and 2021.

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Background: Advanced surgical interventions are required to treat malignancies in the anterior skull base (ASB). This study investigates the utility of endoscopic endonasal and transcranial surgery (EETS) using a high-definition three-dimensional exoscope as an alternative to traditional microscopy.

Methods: Six patients with carcinomas of varying histopathologies underwent surgery employing the EETS maneuver, which synchronized three distinct surgical modalities: harvesting of the anterolateral thigh flap, initiation of the transnasal technique, and initiation of the transcranial procedure.

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Objectives This retrospective study aimed to investigate the relationships between the Keros classification, the Gera classification, the vertical height of the posterior ethmoid roof (ER), and anterior ethmoidal artery (AEA) types in Japanese patients. Methods We investigated the computed tomography (CT) slices of paranasal sinuses (120 sides) of 60 patients; measured the cribriform plate (CP) depth, lateral lamella CP angle (LLCPA), and vertical height of the lateral ER from the hard palate (LERHP) at the coronal plane of the posterior ethmoidal artery (PEA); and reviewed the AEA types, whether floating or non-floating. Results CP depth was positively correlated with LLCPA (r=0.

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Vocal process granulomas are mainly associated with vocal abuse, gastroesophageal reflux disease (GERD), or endotracheal intubation. In the present study, we evaluate the prognostic factors and the usefulness of a grading system in 64 patients with vocal process granulomas. We classified the granuloma which limited the vocal process of the arytenoid cartilage as grade I, and which originated from the vocal process but extended beyond the vocal process of the arytenoid cartilage as grade II, according to the grading system proposed by Wang CP, et al.

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Objective: Since most patients with peritonsillar abscess (PTA) can be successfully treated with surgical drainage and empirical antibiotic therapy, routine bacteriologic studies for all patients with PTA may be unnecessary. This study tried to evaluate which patients with PTA should certainly undergo bacteriologic studies.

Methods: Hundred consecutive patients with PTA were treated and underwent culture tests of purulent contents obtained by surgical drainage between April 2008 and December 2013.

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Background: Few studies have investigated the clinical characteristics of patients with glottic cancer without hoarseness.

Methods: This retrospective clinical study investigated 371 patients with glottic cancer.

Results: Thirty-two of the 371 patients (8.

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Peritonsillar abscess is a frequently encountered otorhinolaryngological emergency, but the characteristics of patients with this disease have not been described in detail. The objective of this study was to delineate prognostic factors associated with peritonsillar abscess and the effects of early surgical drainage for the treatment of peritonsillar abscess. We conducted a retrospective analysis of the medical records of 240 consecutive patients with PTA during the period from 2007 to 2013.

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Article Synopsis
  • A study assessed the safety and complications of combining endoscopic biliary drainage (EBD) with endoscopic sphincterotomy (EST) as an initial treatment for patients with moderate acute cholangitis caused by choledocholithiasis.
  • The analysis showed that while precut sphincterotomy (PST) increased the risk of post-EST pancreatitis, only younger age was linked to a higher risk of post-EST hemorrhage.
  • Results indicated that patients who underwent EBD plus EST initially had a shorter hospitalization period compared to those who received EST electively after EBD, highlighting the effectiveness of the combination therapy.
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A 57-year-old man was admitted to our hospital because of low-grade fever and pain in the right hypochondrium. Abdominal ultrasonographic (US) examination revealed a hyperechoic mass in the body of the gallbladder. The wall of the gallbladder towards the fundus was markedly thickened, while the wall near the gallbladder neck showed no abnormality.

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Background: It has been reported that the administration of ulinastatin, gabexate mesylate, or somatostatin may be effective in the prevention of post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis. However, few randomized trials of ulinastatin and gabexate mesylate for the prevention of post-ERCP pancreatitis have been reported. The aim of this study was to compare the efficacy of ulinastatin and gabexate mesylate for the prevention of post-ERCP pancreatitis.

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We encountered 4 cases of hepatic peribiliary cysts (HPBC) in our hospital. Two were asymptomatic, one was complicated by a choledocholithiasis, and one by cholangitis and sepsis. Based on a review of the 38 cases of HPBC clinically diagnosed in Japan, the main problem associated with this disease seemed incorrect preoperative diagnosis leading to an unnecessary hepatectomy.

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