Publications by authors named "Seiichiro Kamimura"

Objective: Eosinophilic Otitis Media (EOM) is an intractable disease caused by type 2 inflammation, such as Eosinophilic Chronic Rhinosinusitis (ECRS) and bronchial asthma. Biologics have recently been used to treat ECRS and bronchial asthma. Biologics are not indicated for EOM; however, because approximately 10% of ECRS cases has concomitant EOM, concomitant EOM improvement has been observed when dupilumab is administered for ECRS.

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  • Orbital apex syndrome (OAS) causes visual loss, double vision, and eye pain due to various underlying conditions, including acute invasive fungal rhinosinusitis (AIFRS).
  • A case study presented a 76-year-old man with OAS linked to AIFRS, who underwent surgery and received antifungal treatment after a failed corticosteroid regimen.
  • The findings highlight the difficulty in differentiating between AIFRS-induced OAS and other forms, emphasizing the importance of conducting a biopsy before corticosteroid treatment to avoid worsening fungal infections and ensure better patient outcomes.
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  • Ethmoidal arteries are vulnerable to injury during endoscopic sinus surgery, prompting this study to investigate their locations in Japanese patients.
  • A review of CT images from 50 patients showed that anterior ethmoidal arteries (AEAs) and posterior ethmoidal arteries (PEAs) were consistently present, with a notable percentage running below the anterior skull base (ASB).
  • The findings suggest that surgeons should exercise caution when operating near AEAs, especially in patients with supraorbital ethmoid cells, to minimize the risk of injury.
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SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily B member 1 (SMARCB1) is a tumor suppressor gene, and SMARCB1 deficits have been associated with numerous malignant tumors. Carcinomas with a SMARCB1 deficit generally have a poor prognosis. In the head and neck region, there have been many recent cases of SMARCB1-deficient sinonasal carcinoma, but reports of extrasinonasal sites are extremely rare.

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Background: Surgical treatment is recommended for patients with severe allergic rhinitis (AR) refractory to medical treatment. Endoscopic posterior nasal neurectomy (PNN) is primarily performed to improve rhinorrhea in severe perennial AR, however studies on its long-term prognosis are lacking.

Aims/objectives: This study aimed to investigate the long-term prognosis of PNN.

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  • The study aimed to create and validate equations for estimating appendicular skeletal muscle mass (ASM) in head and neck cancer patients, using easily obtainable data, since standard imaging techniques for this purpose are rarely performed in these patients.
  • The research involved 103 men with head and neck cancer, dividing them into development and validation groups, and used statistical methods to create equations that included factors like urinary creatinine excretion, handgrip strength, body weight, and height.
  • The developed equations demonstrated a strong correlation with bioelectrical impedance analysis measurements and showed high accuracy for estimating ASM and diagnosing sarcopenia, making them practical for clinical use without specialized equipment.
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Background: Women with higher breast density are at higher risk of developing breast cancer. Breast density is known to affect sensitivity to mammography and to decrease with age. However, the age change and associated factors involved are still unknown.

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Background & Aims: Cancer cachexia is commonly associated with poor prognosis in patients with head and neck cancer (HNC). However, its pathophysiology and treatment are not well established. The current study aimed to assess the muscle mass/quality/strength, physical function and activity, resting energy expenditure (REE), and respiratory quotient (RQ) in cachectic patients with HNC.

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Objectives: The aims of this study were to investigate the correlation of phase angle (PhA) with other parameters (e.g., muscle mass/quality/strength and physical function), assess the prognostic relevance of prechemoradiotherapy (CRT) PhA, and suggest a reference value of PhA in Asian patients with head and neck cancer (HNC).

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Objective: We examined the effects of SLIT with tablets containing JCP antigens on nasal symptoms and sleep disturbance in patients with Japanese cedar pollinosis during pollen dispersal season.

Methods: A total of 128 patients with Japanese cedar pollinosis were categorized into four groups:19 one-year SLIT with tablets group, 16 two-year SLIT with drops group, 19 antihistamine group, and 74 untreated group. The scores of nasal symptoms and sleep disturbance were evaluated based on the Japanese guidelines for allergic rhinitis and the Athens Insomnia Scale.

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  • - The study investigated the effects of dual sublingual immunotherapy (SLIT) using Japanese cedar pollen (JCP) and house dust mite (HDM) allergens on nasal symptoms in allergic rhinitis patients during high pollen periods and late fall.
  • - Twenty-five patients were enrolled, with 16 receiving dual therapy and 9 receiving only JCP therapy; results showed significant improvement in nasal symptoms for those on dual-SLIT compared to previous antihistamine use.
  • - The findings indicate that dual-SLIT is more effective than mono-SLIT in reducing nasal obstruction during peak pollen times, suggesting it may help address both seasonal and perennial allergy symptoms more effectively.
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  • The study investigates whether serum SCCA levels can serve as clinical markers for monitoring the recurrence of sinonasal inverted papilloma (IP) after surgical treatment.
  • Researchers measured changes in SCCA levels in 25 patients post-surgery and examined their correlation with IP recurrence.
  • The results indicate that elevated SCCA levels after surgery are linked to a higher chance of IP recurrence, with a specific cut-off value of 1.85 ng/ml showing high accuracy in predicting future recurrences.
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Background: Phototherapy with narrow-band ultraviolet B (narrow-band UVB) is clinically effective treatment for atopic dermatitis. In the present study, we examined the effects of intranasal irradiation with narrow-band UVB on nasal symptom, upregulation of histamine H receptor (H1R) gene expression and induction of DNA damage in the nasal mucosa of allergic rhinitis (AR) model rat.

Methods: AR model rats were intranasally irradiated with 310 nm of narrow-band UVB.

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  • Japanese cedar (JC) pollinosis is the most common seasonal allergic rhinitis in Japan and negatively impacts quality of life through nasal symptoms and sleep disturbances.
  • A study with 31 patients receiving sublingual immunotherapy (SLIT) demonstrated significantly lower nasal and sleep disturbance scores compared to 38 untreated patients.
  • The results indicate that SLIT not only reduces nasal symptoms but also improves sleep quality and daily functioning in those suffering from JC pollinosis.
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  • The study investigates how intranasal corticosteroids (INCS) affect histamine H1 receptor (H1R) gene expression in the nasal mucosa of healthy participants and the role of dexamethasone in HeLa cells.
  • Sixteen participants received INCS daily for a week, resulting in a significant decrease in H1R mRNA levels in their nasal mucosa.
  • Dexamethasone was found to suppress both the baseline and histamine-induced expression of H1R mRNA and ERK phosphorylation in HeLa cells, suggesting that INCS could help prevent nasal symptoms during pollen season by inhibiting gene expression linked to allergic responses.*
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H-antihistamines antagonize histamine and prevent it from binding to the histamine H receptor (H1R). Some of them also act as inverse agonists, which are more potent than pure antagonists because they suppress the constitutive H1R activity. Bilastine is a non-sedative antihistamine which is one of the most satisfy the requirements for oral antihistamines.

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It has been reported that polymorphisms within the gene-encoding enzymes related to alcohol metabolism are associated with levels of serum HDL-cholesterol (HDL-C) in East Asian populations. We evaluated the effects of genetic variants within the aldehyde dehydrogenase-2 (ALDH2) gene and the alcohol dehydrogenase-1B (ADH1B) gene on changes in the lipid profile in an 11-year longitudinal study. We genotyped rs1229984 within ADH1B and rs671 within ALDH2.

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Purpose: It has been reported that adipocytes secrete vascular endothelial growth factor. Therefore, we conducted a 5-year longitudinal epidemiological study to further elucidate the association between vascular endothelial growth factor levels and temporal changes in body mass index.

Methods: Our study subjects were Japanese male workers, who had regular health check-ups.

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Objective: Globus pharyngeus (GP) is a common symptom of laryngopharyngeal reflux disease (LPRD), and proton pump inhibitor (PPI) and rikkunshito, a traditional Japanese medicine having prokinetic effect improve LPRD symptoms. In the present study, we examined the efficacy of high-dose PPI in combination with rikkunshito in patients complaining of GP.

Methods: 106 patients complaining of GP without any organic endoscopic findings were enrolled.

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Aim: Recently percutaneous ethanol injection (PEI) turned into percutaneous radiofrequency ablation (PRFA), and it has become widely used for the treatment of hepatocellular carcinoma (HCC). The present study was to compare the incidence in postoperative HCC recurrence between these two therapeutic approaches.

Methods: One hundred and sixty-eight first-time HCC in patient cases were chosen for PEI (n=94) and PRFA (n=74).

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Background: hepatic functional reserve is determined by the function and number of hepatocytes, as well as hepatic blood flow. In Japan, endoscopic injection sclerotherapy is often performed prophylactically in patients with high-risk esophageal varices. We examined the effects of blocking portosystemic shunts by this treatment on hepatic circulation and hepatocyte function as evaluated by 99mTc-GSA scintigraphy (HH15, LHL15), an examination via asialoglycoprotein receptors on hepatocytes.

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