Publications by authors named "Katsuhiko Saito"

Lymphangitic carcinomatosis is a metastatic disease with a poor prognosis and poorly understood pathophysiology. We present a case of rapidly worsening lung adenocarcinoma with diffusely spreading cancerous lymphangitis in lung, mediastinum, retroperitoneum, and gastrointestinal tract. Our findings suggest cancer dissemination in this patient was predominantly caused by direct lymphatic invasion.

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Objective: 18F-PSMA 1007 is a promising PET tracer for prostate cancer. We aimed to examine the safety, biodistribution, radiation dosimetry, and clinical effectiveness in Japanese healthy volunteers and patients with prostate cancer.

Methods: Part A evaluated the pharmacokinetics and exposure doses in three healthy volunteers.

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The patient was a man in his 70s. During the treatment for acute myeloid leukemia, abdominal pain and bloody stools appeared. A diagnosis of small intestinal ileus was made by computed tomography scan.

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Photoelectrochemical (PEC) properties of ZnTe-based photocathodes with various structures were investigated to clarify the effective structure for the water reduction reaction. Samples with n-ZnO/ZnTe/p-ZnTe and n-ZnS/ZnTe/p-ZnTe heterostructures showed superior PCE properties to the samples without a heterojunction. In particular, the n-ZnS/ZnTe/p-ZnTe sample exhibited a large photocurrent even at a low applied potential in an electrolyte containing Eu ion as an electron scavenger.

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Background: The Japan Surveillance for Infection Prevention and Healthcare Epidemiology (J-SIPHE) system aggregates information related to antimicrobial resistance (AMR) measures in participating medical institutions nationwide and is intended to be used for promotion of AMR measures in participating facilities and their communities. This multicenter study aimed to determine the usefulness of the J-SIPHE system for evaluating the correlation between antibiotic use and antibiotic resistance in Hokkaido, Japan.

Methods: Data on antibiotic use and detection rate of major resistant Gram-negative bacteria at 19 hospitals in 2020 were collected from the J-SIPHE system, and data correlations were analyzed using JMP Pro.

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We herein report a 73-year-old man with isolated hypertrophic pachymeningitis (HP) showing serological and pathological characteristics of both IgG4-related disorders and granulomatosis with polyangiitis. The patient presented with chronic onset headaches and ophthalmalgia. Brain magnetic resonance imaging (MRI) revealed a hypertrophic enhanced dura mater.

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Article Synopsis
  • Genetic factors, specifically single-nucleotide polymorphisms (SNPs), are important in understanding postoperative nausea and vomiting (PONV), but findings from previous studies often don't apply to different populations due to genetic variations.
  • A study was conducted using a Japanese-specific DNA microarray to analyze the relationship between 659,636 SNPs and PONV in 24 female surgical patients, identifying 78 SNPs associated with the condition.
  • Among these, the T > C variant of rs11232965 in the long non-coding RNA MIR4300HG showed a significant protective effect against PONV, suggesting it could be a new target for further research.
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During routine ultrasound examination, a hyperechoic mass was detected in the anterior segment of the liver in an 80-year-old woman with hepatitis C virus-related cirrhosis. Computed tomography and magnetic resonance imaging findings suggested a malignant tumor with abundant fibrous stroma, similar to cholangiolocellular carcinoma. However, subsequent partial hepatectomy revealed a mass characterized by abundant fibrosis without tumor cells, dilated blood vessels, and marginal ductular reaction.

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Background: Meningiomas that arise from the cranial nerve are rare. We present a case with an intradural extramedullary tumor at the foramen magnum originating from the spinal accessory nerve.

Case Description: The patient was a 69-year-old woman with dizziness and pain in the bilateral shoulder for 2 years.

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We encountered a case of type 4 gastric cancer with esophageal invasion that responded to neoadjuvant chemotherapy containing S-1 and oxaliplatin(SOX)followed by surgery, which could be curative resection. A 46-year-old man was referred to our hospital because of abnormal upper gastrointestinal series findings. He was diagnosed with type 4 advanced gastric cancer with esophageal invasion, cT4b(diaphragm)N2M0, Stage ⅢC, and 3 courses of neoadjuvant SOX therapy were administered.

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This article adds the Japanese perspective to our knowledge of shared decision-making (SDM) preferences by surveying patients with prostate cancer (PCA) and physicians in Japan. In 2015, 103 Japanese patients with PCA were asked about their SDM preferences by using an Internet-based 5-point-scale questionnaire. Concurrently, 127 Japanese physicians were surveyed regarding their perceptions of patient preferences on SDM.

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Renal arteriovenous fistula (AVF) is a rare but potentially severe and life-threatening entity. It can occur after various invasive renal interventions, including resection of a localized renal tumor, renal biopsy, percutaneous renal surgery, and even blunt injury of the kidney. The time of clinical presentation of a renal AVF is variable and may occur decades after the injury originally occurred.

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A correlation function between the Raman intensities and the nearest-neighbor mean-square relative displacement (MSRD) [Formula: see text] of local Bi-O bonds is successfully established based on x-ray absorption fine structure (XAFS) and temperature-dependent Raman spectra in the temperature range 77-300 K in amorphous and crystalline GdYbBiErGaO. The structural symmetries of GdYbBiErGaO are described by using [Formula: see text] of local Bi-O bonds. More importantly, GdYbBiErGaO is found to show excellent infrared (IR) emission properties due to changes in Bi-O bonds, and the IR emission intensities are found to depend on [Formula: see text], by using temperature-dependent photoluminescence spectroscopy.

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A ciliated muconodular papillary tumor (CMPT) has been reported to be a low-grade malignant tumor or benign tumor, consisting of ciliated columnar cells and goblet cells with basaloid cell proliferation, occur in the peripheral lung. We present a case of CMPT in this report. A 42-year-old male was referred to our department due to a nodule detected in the peripheral left lower lobe of lung.

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Nontraumatic rupture of the bladder is less widely recognized than traumatic rupture, with a challenging early diagnosis due to high variability in clinical presentations. We report a case of extraperitoneal rupture of a bladder diverticulum in a patient with diabetes mellitus who presented with paralytic ileus. Despite conservative management, the patient developed sepsis requiring surgical treatment.

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Article Synopsis
  • * On average, patients had a 1.0-year interval before developing distant metastases, with a 65.5% 2-year survival rate after lymph node recurrence; this varies significantly based on hormone receptor status.
  • * Patients with estrogen receptor (ER)-negative tumors showed a significantly shorter disease-free interval and lower survival rates compared to those with ER-positive tumors, indicating a poorer prognosis for those with ER-negative tumors.
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Metastases to the gastrointestinal tract rarely occur in breast cancer except in invasive lobular carcinoma. The present study reports a rare case of metastatic gastric cancer from invasive ductal carcinoma (IDC) of the breast mimicking primary gastric linitis plastica. A 51-year-old premenopausal female, who had a history of partial mastectomy for right breast cancer at the age of 40, was referred to Toyama City Hospital (Toyoma, Japan) for an endoscopic diagnosis of gastric linitis plastica.

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Adrenal cysts are rare, and their clinical management remains controversial. We report a case involving an adrenal cyst with a complicated appearance on radiological studies. Unenhanced computed tomography revealed a unilocular, noncalcified, hypoattenuating mass with a thin wall in the left adrenal gland.

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Background: Emphysematous cholecystitis is a severe variant of acute cholecystitis caused by anaerobic bacteria. Although intraperitoneal air as a complication has been described in association with emphysematous cholecystitis, pneumoretroperitoneum arising from emphysematous cholecystitis is extremely rare. Herein, we describe a rare case of pneumoretroperitoneum arising from emphysematous cholecystitis that was successfully treated with emergency surgery.

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The occurrence of severe neutropenia during treatment with irinotecan (CPT-11) is associated with the and alleles of uridine diphosphate glucuronosyltransferase 1A1 (). However, the correlation between these variants and the occurrence of severe neutropenia in a low-dose CPT-11 regimen for the treatment of gynecological cancers has not been extensively studied. There are also no studies regarding the association between the 421C>A mutation in ATP-binding cassette sub-family G member 2 () and the occurrence of severe neutropenia in CPT-11-treated patients with gynecological cancers.

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Background: Colon cancer can arise from the mucosa in a colonic diverticulum. Although colon diverticulum is a common disease, few cases have been previously reported on colon cancer associated with a diverticulum. We report a rare case of sigmoid colon cancer arising in a diverticulum with involvement of the urinary bladder, which presented characteristic radiographic images.

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Genetic variants, such as single-nucleotide polymorphisms (SNPs), of the μ-opioid receptor gene (OPRM1) might be associated with individual differences in opioid sensitivity, as well as with the incidence and severity of postoperative nausea and vomiting (PONV). The goal of the present study was to determine, in a cohort of Japanese surgical patients, genotypes and haplotypes of several SNPs in the OPRM1 gene, and their association with PONV during the early (first 24 h) postoperative period. We examined the incidence and severity of PONV, during the first 24 h after surgery, in 85 Japanese patients receiving intravenous patient-controlled analgesia fentanyl analgesia for postoperative pain control.

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Cases of low-grade B-cell lymphoma presenting primarily in the bone marrow are rare, and its clinicopathology remains unclear. We retrospectively examined patients with low-grade B-cell lymphoma presenting primarily in the bone marrow. Fourteen patients met the inclusion criteria, including 5 with lymphoplasmacytic lymphoma (LPL), 3 with chronic lymphocytic leukemia/small lymphocytic lymphoma, 2 with follicular lymphoma (FL), and 4 with low-grade B-cell lymphoma not otherwise specified (LGBCL-NOS).

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