Publications by authors named "Okuyama Y"

Objective: We aimed to examine trends in novel antiandrogen receptor signal inhibitor (ARSI) usage and medical costs by collecting real-world big data included in The National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) Open Data, covering most of the clinical practices throughout Japan.

Methods: Usage data for outpatient prescriptions from 2016 to 2021 were extracted from the NDB Open Data. Among the 459,610 million tablets/capsules prescribed, prostate cancer-specific agents (bicalutamide, estramustine phosphate, flutamide, abiraterone, enzalutamide, apalutamide, and darolutamide) were selected to investigate the trends of usage and medical costs.

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FMS-like tyrosine kinase 3-internal tandem duplication (FLT3-ITD)-positive acute myeloid leukemia (AML) has a poor prognosis, particularly with DNMT3A and NPM1 mutations. Quizartinib, a FLT3 inhibitor showing clinical benefit in FLT3-ITD-positive AML, has unclear safety and efficacy when combined with donor lymphocyte infusion (DLI). We report a case of FLT3-ITD-positive AML with DNMT3A and NPM1 mutations that relapsed after allogeneic hematopoietic stem cell transplantation (allo-HCT) and was treated with quizartinib and DLI.

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  • Cor triatriatum sinister (CTS) is a rare heart condition where the left atrium is divided into two parts, which can sometimes cause a heart problem called atrial fibrillation (AF).
  • An 80-year-old man diagnosed with AF was found to have CTS after tests showed his left atrium was enlarged and divided by a membrane.
  • The doctors successfully performed a procedure to treat the AF by isolating the pulmonary veins, and the patient felt better afterward and had no complications during his recovery.
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Introduction: Previously, our institution measured peripheral blood CD34 cell counts both pre- and post-peripheral blood stem cell harvest (PBSCH), with both samples analyzed simultaneously post-PBSCH. Since 2021, we have measured pre-CD34 cell counts during PBSCH, adjusting the processed blood volume based on these results. We retrospectively evaluated how this change impacted cellular therapy.

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Patients with refractory or relapsed (R/R) large B-cell lymphoma (LBCL) refractory to first-line chemotherapy or with early relapse have poor outcomes. While chimeric antigen receptor (CAR) T-cell therapy has impressive efficacy after two or more lines of chemotherapy, it's still uncertain if these outcomes remain consistent in the context of third-line CAR T-cell therapy. We conducted a retrospective study of 107 R/R LBCL patients.

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  • Gossypiboma is a rare surgical complication where gauze is unintentionally left inside the body, leading to inflammation and tissue adhesion, often without symptoms for years.
  • * It can be difficult to diagnose preoperatively, as common imaging techniques like ultrasound and CT may not clearly show it, especially when located near the gastrointestinal tract.
  • * The report highlights how endoscopic ultrasound and fine-needle aspiration can be effective for diagnosing gossypiboma before surgery by providing detailed imaging and tissue analysis.
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Disease recurrence remains the principal cause of treatment failure after allogeneic hematopoietic stem cell transplantation. Post-transplant maintenance therapy with azacitidine (AZA) is promising to prevent relapse but the outcomes are unsatisfactory in patients at high risk of recurrence. Herein, we evaluated the outcome in patients who received AZA and gemtuzumab ozogamicin (GO), anti-CD33 antibody-calicheamicin conjugate, as post-transplant maintenance therapy.

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An 83-year-old male underwent three transgastric punctures with endoscopic ultrasound-guided fine-needle aspiration for the examination of a pancreatic body tumor. After a diagnosis of resectable pancreatic cancer and undergoing distal pancreatectomy, the patient was administered postoperative adjuvant chemotherapy with oral S-1 for 6 months, and carcinoembryonic antigen and carbohydrate antigen 19-9 levels were bimonthly evaluated. Carbohydrate antigen 19-9 levels continually increased to 4638.

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  • - A 63-year-old man with adult T-cell leukemia-lymphoma received a bone marrow transplant from an unrelated donor and was later diagnosed with invasive pulmonary aspergillosis (IPA) 17 days post-transplant.
  • - He initially improved with treatment using liposomal amphotericin B, but was switched to voriconazole due to worsening kidney function, and later experienced neurological issues.
  • - The patient passed away on day 62, with an autopsy revealing fungal infection in the lungs and a ruptured cerebral aneurysm, emphasizing the need for careful monitoring of transplant patients for fungal-related complications.
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A 28-year-old man was diagnosed with acute myelomonocytic leukemia. He achieved complete remission (CR) after two cycles of induction therapy. However, after consolidation therapy, bone marrow aspiration performed to prepare for allogeneic hematopoietic stem cell transplantation revealed disease relapse.

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  • A 70-year-old man underwent treatment for a large tumor in his colon, diagnosed as intramucosal carcinoma, and experienced a small perforation during endoscopic submucosal dissection.
  • After conservative treatment, he was discharged without further surgery, and no local recurrence was observed for two years.
  • However, two years later, he developed several peritoneal metastases, highlighting the potential risk of tumor spread after small perforations during endoscopic procedures and the importance of careful monitoring afterward.
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An 18-year-old man underwent allogenic bone marrow transplantation (BMT) for Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ALL). Ph+ALL relapsed 3 months after the first BMT, and the patient underwent a second BMT. However, Ph+ALL relapsed 4 months after the second BMT, and he received a haploidentical peripheral blood stem cell transplantation (haplo-PBSCT) from his father.

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Introduction: Paroxysmal nocturnal hemoglobinuria (PNH) is a rare hematological disease characterized by intravascular hemolysis, thrombosis, and bone marrow (BM) failure. Although PNH is caused by excessive proliferation of hematopoietic stem cell (HSC) clones with loss of function mutations in phosphatidylinositol N-acetylglucosaminyltransferase subunit A () genes, what drives PNH clones to expand remains elusive.

Case Description: We present a case of a 26-year-old female who presented with hemolytic anemia, thrombocytopenia, and leukopenia.

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  • The study examines the increasing incidence of colorectal neuroendocrine tumors (NETs) due to more frequent cancer screenings and colonoscopies, highlighting a shift in management from radical surgery to endoscopic resection methods.
  • Researchers analyzed short-term outcomes from 418 patients who underwent endoscopic treatments for colorectal NETs, focusing on en bloc resection rates and tumor-free margins.
  • The findings revealed that various endoscopic methods, particularly endoscopic submucosal resection with a ligation device (ESMR-L), were effective and safe for treating tumors smaller than 10 mm, with high R0 resection rates and minimal complications.
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Supply chain management relies on accurate backorder prediction for optimizing inventory control, reducing costs, and enhancing customer satisfaction. Traditional machine-learning models struggle with large-scale datasets and complex relationships. This research introduces a novel methodological framework for supply chain backorder prediction, addressing the challenge of collecting large real-world datasets with 90% accuracy.

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  • - The study evaluated the effectiveness of texture and color enhancement imaging (TXI) compared to narrow band imaging (NBI) for detecting polyps in the right side of the colon during colonoscopy in patients aged 40 and above, involving 381 participants across three institutions.
  • - Researchers conducted a 30-second additional observation (Add-30-s) using either TXI or NBI after initial viewing with white light to compare detection rates of adenomas and sessile serrated lesions.
  • - Results showed that TXI was noninferior to NBI, with similar detection rates of polyps between both methods, indicating that TXI can be a viable alternative to NBI for polyp detection in colon examinations.
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A persistent left superior vena cava (PLSVC) is a commonly observed anatomical anomaly that is frequently detected incidentally via computed tomography (CT) imaging. However, the occurrence of a PLSVC with a right superior vena cava (RSVC) defect, also known as "isolated PLSVC," is a much rarer anomaly. This peculiar malformation can lead to sinoatrial dysfunction, thus necessitating pacemaker implantation, which requires delicate manipulation due to various anatomical complexities.

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Objective: The prognosis of patients with relapsed or refractory (R/R) diffuse large B-cell lymphoma (DLBCL) is poor. Although patients who fail first-line salvage chemotherapy are candidates for second-line salvage chemotherapy, the optimal treatment strategy for these patients has not yet been established.

Methods: The present, single-center, retrospective study included transplant-eligible patients with R/R DLBCL who received second-line salvage chemotherapy with curative intent.

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  • - This study evaluates the effectiveness of a new phase mapping system, ExTRa Mapping, in identifying and treating rotors as a maintenance mechanism for nonparoxysmal atrial fibrillation (non-PAF) in patients who have previously undergone pulmonary vein isolation (PVI).
  • - Among 73 patients studied, 69% achieved freedom from non-PAF and atrial tachycardia recurrence 12 months after ExTRa Mapping-guided rotor ablation (ExTRa-ABL), with better outcomes noted in those who had non-PAF for 60 months or less before the procedure.
  • - The results indicate that patients with a non-PAF duration longer than 60 months had less
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Pola-BR (polatuzumab vedotin, bendamustine, and rituximab) therapy received approval for relapsed/refractory diffuse large B-cell lymphoma (R/R DLBCL) in Japan in March 2021. There have been few reports on the efficacy and safety of Pola-BR therapy in Japanese clinical practice. A retrospective analysis was performed on twenty-nine patients with R/R DLBCL who received Pola-BR therapy at our institution (intent to cellular immunotherapy cohort: 20 patients, stand-alone treatment cohort: nine patients).

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The frequency of the manufacturing failure of chimeric antigen receptor (CAR)-T cell therapy in clinical practice is unknown. To clarify the current state of how likely CAR-T cell production is to succeed or fail for B-cell acute lymphoblastic leukemia (B-ALL), we analyzed cases in which the production of tisagenlecleucel was performed for patients with B-ALL at 15 facilities in Japan from October 2019 to March 2022. Total 81 patients (47 males and 34 females) were analyzed.

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Background/aim: Palbociclib was the first cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitor approved worldwide. Currently, CDK4/6 inhibitors are strongly recommended for endocrine therapy in the first or second line with hormone receptor-positive advanced breast cancer. It is expected the use of CDK4/6 inhibitor will further increase.

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