Publications by authors named "Takenori Ogawa"

Background: Previously, we proposed that the immune-modified Glasgow Prognostic Score (imGPS), which adds the lymphocyte count to the mGPS, is helpful as a prognostic marker for patients with head and neck squamous cell carcinoma. In this study, we investigated the imGPS as a marker for the therapeutic effect of pembrolizumab in treating recurrent and metastatic head and neck cancer (RMHNC).

Methods: This study included RMHNC patients who were treated with pembrolizumab from December 2019 to April 2024.

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Objective: To distinguish squamous cell carcinoma in inverted papilloma (IP-SCC) from IP, the utility of CT scoring system was investigated.

Methods: We extracted cases histopathologically diagnosed with IP and IP-SCC of the sinonasal cavity from June 2004 to May 2021. Preoperative unenhanced CT images were used to evaluate the presence or absence of bone destruction and erosion: Score 1 = positive for bone destruction and/or erosion; Score 0 = negative for bone destruction and erosion.

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Owing to its mitogenic and angiogenic characteristics, the use of basic fibroblast growth factor (bFGF) to promote wound healing has been investigated. However, its clinical efficacy has fallen short of expectations due to its instability. Heparin has been reported to stabilize bFGF.

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Article Synopsis
  • Transoral surgery is effective for early-stage pharyngeal and laryngeal cancer, offering good local control with less invasiveness compared to external incisions, but criteria for postoperative treatment remain unclear.
  • In a study of 70 patients at Gifu University Hospital, high rates of positive surgical margins were found (38.6% horizontal, 27.1% vertical), yet overall survival rates were strong, with 77.1% surviving five years post-surgery.
  • Horizontal margin positivity correlated with worse outcomes, while vascular invasion wasn't significantly linked to prognosis, indicating a need for more research to establish clear postoperative treatment guidelines.
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  • A 73-year-old woman presented with swelling in her left cheek, leading to a diagnosis of meningioma with spread along the maxillary nerve.
  • Imaging revealed a mass with both intracranial and extracranial components, affecting several areas including the cavernous sinus and nasal cavity.
  • A biopsy confirmed the condition as meningothelial meningioma, indicating the tumor's complex involvement of surrounding structures.
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Purpose: This study aimed to evaluate the MRI features of the main histological subtypes of thyroid cancer and enable differentiation between anaplastic thyroid carcinoma (ATC), poorly differentiated thyroid carcinoma (PDTC), and papillary thyroid carcinoma (PTC).

Materials And Methods: This study included 79 patients with histopathologically proven thyroid cancer (14 ATCs, 8 PDTCs, and 57 PTCs) who underwent neck MRI. MRI images were retrospectively reviewed and compared between the three pathologies.

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Purpose: The present study aimed to investigate CT imaging features, pathological findings, and prognosis in patients with thyroid hemiatrophy (THA) associated with papillary thyroid carcinoma (PTC).

Methods: This retrospective study included 225 patients with histopathologically proven PTC treated by surgical resection who underwent preoperative CT scanning. On CT images, THA was defined as thyroid parenchymal hemiatrophy on the ipsilateral side of PTC.

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Ultrasound, or sound at frequencies exceeding the conventional range of human hearing, is not only audible to mice, microbats, and dolphins, but also creates an auditory sensation when delivered through bone conduction in humans. Although ultrasound is utilized for brain activation and in hearing aids, the physiological mechanism of ultrasonic hearing remains unknown. In guinea pigs, we found that ultrasound above the hearing range delivered through ossicles of the middle ear evokes an auditory brainstem response and a mechano-electrical transduction current through hair cells, as shown by the local field potential called the cochlear microphonic potential (CM).

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Purpose: Swallowing dysfunction and the risk of aspiration pneumonia are frequent clinical problems in the treatment of head and neck squamous cell carcinomas (HNSCCs). Breathing-swallowing coordination is an important factor in evaluating the risk of aspiration pneumonia. To investigate breathing-swallowing discoordination after chemoradiotherapy (CRT), we monitored respiration and swallowing activity before and after CRT in patients with HNSCCs.

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Voice abuse, chronic cough, laryngeal surgery, and tracheal intubation may lead to injury and subsequent repair/remodeling in the vocal fold mucosa. Periostin is known to be involved in airway remodeling and is also associated with various otolaryngological diseases. D-β-aspartic acid is the major isomer of D-aspartic acid found in tissues of elderly individuals.

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Objective The after-effects of coronavirus disease 2019 (COVID-19) infection are still unknown; therefore, we investigate the possibility that COVID-19 may interrupt cancer treatment and impact prognosis. Methods We examined the characteristics, prognosis, and changes in treatment options before and after COVID-19 in 11 head and neck cancer patients who were infected with COVID-19 after admission for cancer treatment at Gifu University Hospital. These patients were compared to 110 patients unaffected by COVID-19 during the same period.

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Purpose: This study aimed to assess the imaging features and postoperative natural course of F-fluorodeoxyglucose (FDG) uptake in the cervical muscles after neck dissection.

Materials And Methods: This study included 83 patients who underwent preoperative and postoperative F-FDG-PET/CT and were diagnosed with head and neck malignancy after neck dissection. Postoperative F-FDG-PET/CT was performed within 5 years after neck dissection.

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Purpose: This study aimed to compare the radiological tumor (T)-category using multiparametric MRI with the pathological T category in patients with oral tongue squamous cell carcinoma (OTSCC) and to examine which is a better predictor of prognosis.

Methods: This retrospective study included 110 consecutive patients with surgically resected primary OTSCC who underwent preoperative contrast-enhanced MRI. T categories determined by maximum diameter and depth of invasion were retrospectively assessed based on the pathological specimen and multiparametric MRI.

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Article Synopsis
  • - The study examined how long-term voice abuse or sudden injury affects the vocal fold mucosa and focused on the roles of CD31, CD34, and periostin in vocal fold polyp formation.
  • - Histopathological analysis of 57 vocal fold polyp samples revealed that CD31 and CD34 were expressed in 71.9% and 93% of samples, respectively, while periostin was found in 71.9% of samples, indicating their involvement in polyp development.
  • - The research identified different patterns of marker expression associated with specific histological subtypes of vocal fold polyps, suggesting that these vascular endothelial markers could aid in staging the condition.
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Ultrasound (US) imaging effectively provides real-time anatomical information for clinical examinations. In otolaryngology, US imaging can visualize laryngeal muscles as well as cervical muscles. Here we present the case where US imaging was used while injecting botulinum toxin (BT) for the treatment of abductor spasmodic dysphonia, which provided definite results.

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Infantile laryngeal hemangiomas are relatively common. However, adult vocal cord hemangiomas are extremely rare. A 46-year-old woman was referred to our department for hoarseness, which continued for 18 months.

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Article Synopsis
  • - The "Japanese Clinical Practice Guidelines for Head and Neck Cancer - 2022 Update" aims to review and update standard diagnosis and treatment approaches based on the latest evidence in the field.
  • - Developed by a diverse committee of experts, including surgeons, oncologists, and rehabilitation specialists, these guidelines are based on the previous 2018 edition and include input from public feedback.
  • - The guidelines address 59 clinical questions across 13 categories, with a focus on six specific clinical questions and their corresponding recommendations and comments.
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Salivary gland cancers (SGCs) are heterogeneous tumors, and precision oncology represents a promising therapeutic approach; however, its impact on SGCs remains obscure. This study aimed to establish a translational model for testing molecular-targeted therapies by combining patient-derived organoids and genomic analyses of SGCs. We enrolled 29 patients, including 24 with SGCs and 5 with benign tumors.

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Purpose: This study aimed to assess the utility of pretreatment magnetic resonance imaging (MRI) in predicting the clinical outcomes of patients with parotid gland cancer.

Methods: A total of 43 patients with histopathologically confirmed primary parotid gland cancer, who underwent pretreatment MRI, were enrolled in this study. All images were retrospectively reviewed, and MRI features were evaluated as possible prognostic factors influencing the progression-free survival (PFS) using the Kaplan-Meier method and Cox proportional hazards regression model.

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Objective: Head and neck cancer (HNC) is a tumor occurring in various primary sites with limited chemotherapy options for its treatment. Recently, comprehensive genomic profiling (CGP) testing has become clinically widespread. In this study, we examined the utility of CGP in diagnosing and treating HNC.

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Article Synopsis
  • Long-term voice abuse or sudden injuries to the vocal folds can lead to mutations and changes in their structure, which may contribute to the development of vocal fold polyps.
  • The study examines the expressions of two substances, D-β-aspartic acid and periostin, in vocal fold polyp tissue samples from 36 patients, revealing that both were present and exhibited distinct patterns in the samples.
  • The researchers propose that the presence of D-β-aspartic acid and periostin may play a role in the pathological changes associated with vocal fold polyps, including tissue changes and fibrosis.
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Purpose: This study aimed to determine the MRI features of sporadic/simple lymphoepithelial cyst (SLEC) of the parotid gland.

Methods: Ten patients (seven men, three women; mean age, 60 years; age range, 38-77 years) with histopathologically and clinically proven SLEC of the parotid gland who underwent MRI before surgical resection were enrolled in this study. No enrolled patient had HIV infection or Sjögren syndrome.

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Ototoxicity is a dose-limiting adverse event for concurrent chemoradiotherapy (CCRT) with high-dose cisplatin for locally advanced head and neck squamous cell carcinoma (HNSCC). Both irradiation to the Eustachian tube (ET) and weight loss are risk factors for patulous ET. The aim of this prospective, observational study was to elucidate the incidences of patulous ET conditions before and after CCRT in HNSCC patients by means of ET function tests.

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Long non-coding RNAs (lncRNAs) have emerged as a significant player in various cancers, including pancreatic cancer. However, how lncRNAs are aberrantly expressed in cancers is largely unknown. We hypothesized that lncRNAs would be regulated by signaling pathways and contribute to malignant phenotypes of cancer.

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Article Synopsis
  • * The surgical removal of the metastatic lymph node involved the resection of nutrient vessels; however, the jejunum remained viable and did not become necrotic, suggesting that certain indicators can predict transplant survival post-surgery.
  • * Key survival indicators include monitoring jejunal blood flow using indocyanine green fluorescence imaging and observing jejunal color and movement, which could potentially help surgeons determine the future health of the transplanted jejunum after vessel resection.
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