Publications by authors named "Hayato Miyake"

Chronic traumatic encephalopathy (CTE) has attracted attention due to sports-related head trauma or repetitive mild traumatic brain injury (mTBI). However, the pathology of CTE remains underexplored. Reproducible and quantitative model of CTE has yet to be established.

View Article and Find Full Text PDF

Tenosynovial giant cell tumor (TGCT) is a fibrous histiocytic tumor originating in the synovial membrane. While cervical TGCT may not be considered a common diagnosis preoperatively because it is relatively rare, it has a high recurrence rate and should be considered. Total resection is preferable, but it can be challenging due to the risk of damaging the vertebral artery.

View Article and Find Full Text PDF

Pancreatic ductal adenocarcinoma (PDAC) poses significant challenges due to its high mortality, making it a critical area of research. This retrospective observational study aimed to analyze real-world data from comprehensive genome profiling (CGP) of Japanese patients with PDAC, mainly focusing on differences in gene detection rates among panels and the implications for homologous recombination deficiency (HRD) status. This study enrolled 2568 patients with PDAC who had undergone CGP between June 2019 and December 2021 using data from the nationwide Center for Cancer Genomics and Advanced Therapeutics database.

View Article and Find Full Text PDF
Article Synopsis
  • Protein lactylation, a modification linked to glycolysis, plays a role in gene regulation, but its significance in cancer, especially pancreatic tumors, is still under investigation.
  • The study found increased lactylation in the nuclei of various pancreatic tumors alongside elevated levels of hypoxia-inducible factor-1α, suggesting a connection with tumor hypoxia.
  • Additionally, the chemotherapy drug gemcitabine was shown to decrease histone lactylation, indicating that protein lactylation might be a factor in pancreatic cancer development and treatment.
View Article and Find Full Text PDF

Background: Aplastic or twig-like middle cerebral artery (Ap/T-MCA) is a rare vascular anomaly that can cause hemorrhagic and ischemic stroke. Ap/T-MCA can induce aneurysms due to the fragility of the vessel wall, consequently leading to subarachnoid hemorrhage. Herein, we report a case of Ap/T-MCA with subarachnoid hemorrhage without an aneurysm.

View Article and Find Full Text PDF
Article Synopsis
  • MSI-H (microsatellite instability high) and TMB-high (tumor mutational burden high) types of pancreatic cancer are rare, with only 0.3% and 1.8% of patients, respectively, identified in a study of 2,206 patients with unresectable pancreatic adenocarcinoma.
  • Patients with these subtypes exhibited specific genomic alterations, particularly involving mismatch repair genes and homologous recombination-related genes, but did not respond to chemotherapy, with no clinical responses recorded in MSI-H patients.
  • The study highlights the need for tailored treatment strategies based on genomic characteristics, as MSI-H and TMB-high patients showed lower disease control rates compared to their microsatellite stable counterparts.
View Article and Find Full Text PDF
Article Synopsis
  • This study focuses on rare subtypes of pancreatic cancer (ACC, ASC, ACP) and compares their clinical and genomic characteristics to the more common pancreatic ductal adenocarcinoma (PDAC) using the C-CAT database.
  • Researchers analyzed data from 2,691 patients, finding that mutations in KRAS and TP53 were less common in ACC, while gene alterations related to homologous recombination were more prevalent in ACC compared to PDAC.
  • The results also suggest that ACC patients might respond better to FOLFIRINOX treatment compared to GEM + nab-PTX, indicating distinct treatment efficacies based on tumor genomic differences.
View Article and Find Full Text PDF

A 78-year-old man underwent a tracheostomy after embolization for a dural arteriovenous fistula. Seventy days after tracheostomy, arterial bleeding appeared through the tracheal stoma. The bleeding stopped spontaneously.

View Article and Find Full Text PDF
Article Synopsis
  • A solid pseudopapillary neoplasm (SPN) of the pancreas is a rare tumor primarily found in young women, and a case of spontaneous regression is reported.
  • A 48-year-old woman was diagnosed with a pancreatic mass after complaining of back pain, and various imaging studies characterized the tumor without significant abnormalities in enzyme levels or markers.
  • After being advised for surgery, the patient opted for monitoring and, after one year, an MRI revealed that the tumor had spontaneously regressed, suggesting that hormonal changes related to menopause might influence SPN growth.
View Article and Find Full Text PDF

Aim: The purpose of this study was to clarify whether fatty pancreas might lead to impaired pancreatic endocrine or exocrine function.

Material And Methods: The study involved 109 participants who had undergone the glucagon stimulation test and N-benzoyl-L-tyros-p-amino benzoic acid (BT-PABA) test to assess pancreatic function as well as unenhanced abdominal computed tomography (CT). Pancreatic endocrine impairment was defined as ΔC peptide immunoreactivity less than 2 [mmol/L] in the glucagon stimulation test, and pancreatic exocrine impairment was defined as a urinary PABA excretion rate less than 70% on the BT-PABA test.

View Article and Find Full Text PDF

Purpose: Streptozocin (STZ) is a key agent for treating advanced pancreatic neuroendocrine tumors (pNET). Most STZ regimens for pNET are daily and also include 5-fluorouracil (5FU), whereas STZ monotherapy and weekly regimens have also been applied in daily practice in Japan. The present study aimed to evaluate responses to weekly regimens and to STZ monotherapy, and to identify a predictive marker of a response to STZ.

View Article and Find Full Text PDF