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  1. Article ; Online: Evaluating production rates of particulate organic hydrogen by marine phytoplankton for estimating phytoplanktonic productivity of organically bound tritium.

    Satoh, Yuhi / Omori, Yuko

    Water research

    2023  Volume 245, Page(s) 120592

    Abstract: To estimate the production potential of organically bound tritium (OBT) by phytoplankton from tritiated water in coastal areas adjacent to the Fukushima Daiichi Nuclear Power Plant (FDNPP), phytoplanktonic production rates of particulate organic hydrogen ...

    Abstract To estimate the production potential of organically bound tritium (OBT) by phytoplankton from tritiated water in coastal areas adjacent to the Fukushima Daiichi Nuclear Power Plant (FDNPP), phytoplanktonic production rates of particulate organic hydrogen (POH) were evaluated in laboratory and field experiments using stable isotope tracers (
    Language English
    Publishing date 2023-09-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 202613-2
    ISSN 1879-2448 ; 0043-1354
    ISSN (online) 1879-2448
    ISSN 0043-1354
    DOI 10.1016/j.watres.2023.120592
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Co-occurring IPMN and pancreatic cancer: the same or different? An overview from histology to molecular pathology.

    Omori, Yuko / Furukawa, Toru / Scarpa, Aldo / Luchini, Claudio

    Journal of clinical pathology

    2023  Volume 76, Issue 11, Page(s) 734–739

    Abstract: Intraductal papillary mucinous neoplasm (IPMN) of the pancreas is one of the most well-established precursors of pancreatic cancer. Its progression to acquire invasiveness is a complex process, based on the accumulation of morphological and genetic ... ...

    Abstract Intraductal papillary mucinous neoplasm (IPMN) of the pancreas is one of the most well-established precursors of pancreatic cancer. Its progression to acquire invasiveness is a complex process, based on the accumulation of morphological and genetic alterations. Recent advances in DNA sequencing also showed that co-occurring IPMNs and pancreatic cancers could be totally independent, further complicating our understanding of this complex scenario. The distinction between IPMN and related pancreatic cancer vs IPMN and co-occurring-but not related-pancreatic cancer is a challenging task in routine diagnostic activity, but may have important implications for precision oncology. Of note, recent multiregional sequencing-based studies focused not only on IPMN multi-step tumourigenesis, but also on the divergent intratumoural heterogeneity of this neoplasm. Globally considered, there are three different situations in which co-occurring IPMNs and invasive carcinomas can be found in the same pancreata, indicated with different terminologies: (1) IPMN-associated carcinoma: this definition indicates a carcinoma arising from an IPMN and can be also defined as IPMN-derived carcinoma, sequential or likely related; (2) independent IPMN and invasive carcinoma: the two lesions are not related, and this situation is defined as concomitant, de novo or likely independent; (3) branch-off pathway, where an invasive carcinoma and an adjacent IPMN develop divergently in a forked fashion from a common ancestral clone. In this review, we aim at clarifying the most important nomenclature/definitions of these different situations, also providing an overview of the molecular state-of-the-art and of the clinical implications of this complex landscape.
    MeSH term(s) Humans ; Carcinoma, Pancreatic Ductal/diagnosis ; Carcinoma, Pancreatic Ductal/genetics ; Pancreatic Intraductal Neoplasms/diagnosis ; Pancreatic Intraductal Neoplasms/genetics ; Pathology, Molecular ; Adenocarcinoma, Mucinous/diagnosis ; Adenocarcinoma, Mucinous/genetics ; Adenocarcinoma, Mucinous/pathology ; Precision Medicine ; Pancreatic Neoplasms/diagnosis ; Pancreatic Neoplasms/genetics ; Pancreatic Neoplasms/pathology ; Retrospective Studies ; Pancreatic Neoplasms
    Language English
    Publishing date 2023-07-27
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 80261-x
    ISSN 1472-4146 ; 0021-9746
    ISSN (online) 1472-4146
    ISSN 0021-9746
    DOI 10.1136/jcp-2023-209012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A Case of Pedunculated Esophageal Neuroendocrine Tumor G1.

    Aoki, Hironori / Omori, Yuko / Katanuma, Akio

    Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association

    2021  Volume 20, Issue 4, Page(s) e651–e652

    MeSH term(s) Esophageal Neoplasms/diagnosis ; Esophageal Neoplasms/pathology ; Esophageal Neoplasms/surgery ; Humans ; Neuroendocrine Tumors/diagnosis ; Neuroendocrine Tumors/surgery
    Language English
    Publishing date 2021-03-01
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 2119789-1
    ISSN 1542-7714 ; 1542-3565
    ISSN (online) 1542-7714
    ISSN 1542-3565
    DOI 10.1016/j.cgh.2021.02.039
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Branch-duct Intraductal Papillary Mucinous Neoplasm with Rapidly Developing Intracystic Xanthogranulomatous Nodules.

    Kitagawa, Sho / Ichihara, Shin / Omori, Yuko / Maeda, Chiho / Ono, Yusuke / Tahara, Munenori / Furukawa, Toru / Muraoka, Shunji / Miyakawa, Hiroyuki

    Internal medicine (Tokyo, Japan)

    2023  Volume 62, Issue 23, Page(s) 3489–3494

    Abstract: We herein report a case of a branch-duct intraductal papillary mucinous neoplasm (IPMN) with rapidly developing intracystic xanthogranulomatous nodules. A unilocular cystic lesion without a mural nodule was found in the pancreatic tail of a 69-year-old ... ...

    Abstract We herein report a case of a branch-duct intraductal papillary mucinous neoplasm (IPMN) with rapidly developing intracystic xanthogranulomatous nodules. A unilocular cystic lesion without a mural nodule was found in the pancreatic tail of a 69-year-old man. Ten months later, multiple mural nodules emerged unexpectedly within the cyst, and the patient underwent distal pancreatectomy. Based on immunohistochemical studies and a molecular analysis, we diagnosed him with branch-duct IPMN of the gastric immunophenotype. Fragility of the pancreatic duct mucosa and consequent exposure of the wall to pancreatic juice might have caused marked granulation nodule formation in the cyst lumen.
    MeSH term(s) Male ; Humans ; Aged ; Carcinoma, Pancreatic Ductal/complications ; Carcinoma, Pancreatic Ductal/surgery ; Carcinoma, Pancreatic Ductal/pathology ; Pancreatic Intraductal Neoplasms/pathology ; Pancreatic Neoplasms/complications ; Pancreatic Neoplasms/diagnosis ; Pancreatic Neoplasms/surgery ; Pancreatic Ducts/pathology ; Cysts
    Language English
    Publishing date 2023-04-14
    Publishing country Japan
    Document type Case Reports ; Journal Article
    ZDB-ID 32371-8
    ISSN 1349-7235 ; 0021-5120 ; 0918-2918
    ISSN (online) 1349-7235
    ISSN 0021-5120 ; 0918-2918
    DOI 10.2169/internalmedicine.0862-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Molecular comparison of concurrent components of high-grade dysplasia, adenocarcinoma, and sarcomatoid carcinoma in a case of sarcomatoid carcinoma of the gallbladder.

    Hirose, Katsuya / Omori, Yuko / Ono, Yusuke / Mizukami, Yusuke / Kaneko, Yoshiki / Maruyama, Tsunehiko / Ohtani, Haruo / Furukawa, Toru

    Virchows Archiv : an international journal of pathology

    2023  Volume 483, Issue 2, Page(s) 261–266

    Abstract: Detailed genetic and immunohistochemical features of a sarcomatoid carcinoma of the gallbladder were reported. Studied was a resected gallbladder tumor involving the transverse colon, which was consisted of 3 histopathological neoplastic components, i.e., ...

    Abstract Detailed genetic and immunohistochemical features of a sarcomatoid carcinoma of the gallbladder were reported. Studied was a resected gallbladder tumor involving the transverse colon, which was consisted of 3 histopathological neoplastic components, i.e., high-grade dysplasia, adenocarcinoma, and sarcomatoid carcinoma. The targeted amplicon sequencing showed somatic mutations in TP53 (p.S90fs) and ARID1A (c.4993 + 1G > T) in all of the 3 components. Copy numbers of CDKN2A and SMAD4 were decreased in the adenocarcinoma and the sarcomatoid component. Immunohistochemistry showed loss of expression of p53 and ARID1A in all components. p16 expression was lost in the adenocarcinoma and the sarcomatoid component, while SMAD4 expression was lost only in the latter. These results suggest that this sarcomatoid carcinoma may have developed by progression from high-grade dysplasia via adenocarcinoma with sequential accumulation of molecular aberrations involving p53, ARID1A, p16, and SMAD4. This information should serve to understand the molecular mechanism of this very intractable tumor.
    MeSH term(s) Humans ; Tumor Suppressor Protein p53/metabolism ; Carcinoma/pathology ; Adenocarcinoma/pathology ; Gallbladder Neoplasms/genetics ; Gallbladder Neoplasms/pathology
    Chemical Substances Tumor Suppressor Protein p53
    Language English
    Publishing date 2023-03-09
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1184867-4
    ISSN 1432-2307 ; 0945-6317
    ISSN (online) 1432-2307
    ISSN 0945-6317
    DOI 10.1007/s00428-023-03524-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Glomerulocystic kidney identified in older patients by magnetic resonance imaging: Relation to renal function and renal corticomedullary differentiation.

    Amano, Yasuo / Omori, Yuko / Yanagisawa, Fumi / Takagi, Ryo

    Medicine

    2019  Volume 98, Issue 17, Page(s) e15350

    Abstract: Glomerulocystic kidney (GCK) is often associated with genetic disorders and identified in children or adolescents. However, there are some case reports describing sporadic adult GCK identified by magnetic resonance imaging (MRI). The purpose of this ... ...

    Abstract Glomerulocystic kidney (GCK) is often associated with genetic disorders and identified in children or adolescents. However, there are some case reports describing sporadic adult GCK identified by magnetic resonance imaging (MRI). The purpose of this study was to evaluate relationship of GCK identified by MRI in older patients to renal function and renal corticomedullary differentiation (CMD) assessed by MRI.GCK was identified in 16 older patients (mean age, 79.2 years) by T2-weighted imaging. The cysts of GCK were numerous, homogeneously small, and located in the renal cortex on T2-weighted images. Ten of the 16 patients with GCK had renal impairment (estimated glomerular filtration rate <60 ml/min/1.73 m). Six patients who had GCK, chronic liver disease, and renal impairment showed moderate or good CMD.GCK identified by MRI may be related to renal impairment in some older patients, including those with preserved CMD as a result of chronic liver diseases.
    MeSH term(s) Aged ; Aged, 80 and over ; End Stage Liver Disease/complications ; Female ; Glomerular Filtration Rate ; Humans ; Kidney/diagnostic imaging ; Kidney/metabolism ; Kidney Diseases/complications ; Kidney Diseases/diagnostic imaging ; Kidney Diseases/metabolism ; Magnetic Resonance Imaging ; Male
    Language English
    Publishing date 2019-05-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80184-7
    ISSN 1536-5964 ; 0025-7974
    ISSN (online) 1536-5964
    ISSN 0025-7974
    DOI 10.1097/MD.0000000000015350
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Prognostic performance of microscopic size measurements in small invasive carcinomas arising in intraductal papillary mucinous neoplasms of the pancreas.

    Zhang, M Lisa / Omori, Yuko / Hong, Seung-Mo / Ideno, Noboru / Date, Kenjiro / Rocha Castellanos, Dario M / Shroff, Stuti G / Zamboni, Giuseppe / Gonzalez, Raul S / Furukawa, Toru / Fernandez-Del Castillo, Carlos / Mino-Kenudson, Mari

    Histopathology

    2024  

    Abstract: Aims: Small invasive carcinomas arising in intraductal papillary mucinous neoplasms (IPMNs) of the pancreas can present as multiple, small foci. In such cases, there is no clear optimal measurement method for determining the invasive size for tumour ... ...

    Abstract Aims: Small invasive carcinomas arising in intraductal papillary mucinous neoplasms (IPMNs) of the pancreas can present as multiple, small foci. In such cases, there is no clear optimal measurement method for determining the invasive size for tumour staging and prognostication.
    Methods: In all, 117 small invasive IPMNs (size of largest invasive component ≤2 cm) from seven institutions (2000-2016) were reviewed, and all individual foci of invasive carcinoma were measured. T stages (AJCC 8th edition) based on the largest single focus size (LS), average size of all foci (AS), and total sum of all foci (TS) were examined in association with clinicopathologic parameters and patient outcomes.
    Results: The cohort comprised IPMNs with invasive tubular-type (n = 82, 70%) and colloid-type (n = 35, 30%) carcinomas. The mean LS, AS, and TS were 0.86, 0.71, and 1.32 cm, respectively. Based on the LS, AS, and TS, respectively, 48, 65, and 39 cases were classified as pT1a; 22, 18, and 11 cases as pT1b; and 47, 34, and 50 cases as pT1c. Higher pT stages based on all measurements were significantly associated with small vessel, large vessel, and perineural invasion (P < 0.05). LS-, AS-, and TS-based pT stages were not significantly associated with recurrence-free survival (RFS) or overall survival (OS) by univariate or multivariate analyses. However, among tubular-type carcinomas, higher LS-, AS-, and TS-based pT stages trended with lower RFS (based on 1-, 3-, and 5-year survival rates). All microscopic measurement methods were most predictive of RFS and OS using a 1.5-cm cutoff, with LS significantly associated with both RFS and OS by univariate and multivariate analysis.
    Conclusions: For invasive tubular-type carcinomas arising in IPMN, microscopic size-based AJCC pT stages were not significant predictors of patient outcomes. However, for LS, a size threshold of 1.5 cm was optimal for stratifying both RFS and OS. The AJCC 8th ed. may not be applicable for stratifying small invasive IPMNs with colloid-type histology that generally portend a more favourable prognosis.
    Language English
    Publishing date 2024-04-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 131914-0
    ISSN 1365-2559 ; 0309-0167
    ISSN (online) 1365-2559
    ISSN 0309-0167
    DOI 10.1111/his.15198
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  8. Article ; Online: Epithelioid Hemangioma of Vertebra Mimicking Metastasis on FDG PET/CT in a Patient With Renal Cell Cancer.

    Yanagisawa, Fumi / Amano, Yasuo / Omori, Yuko / Takagi, Ryo / Tang, Xiaoyan

    Clinical nuclear medicine

    2020  Volume 46, Issue 2, Page(s) 148–150

    Abstract: Abstract: Vertebral epithelioid hemangioma is a rare vascular tumor composed of the many vessels lined by distinct epithelioid endothelial cells. We present the case of a patient with renal cell cancer (RCC) and suspicious vertebral metastasis ... ...

    Abstract Abstract: Vertebral epithelioid hemangioma is a rare vascular tumor composed of the many vessels lined by distinct epithelioid endothelial cells. We present the case of a patient with renal cell cancer (RCC) and suspicious vertebral metastasis presenting with back pain, who was later found to have epithelioid hemangioma. FDG PET/CT demonstrated uptake of FDG not only in RCC, but also in the sixth thoracic vertebral body. The SUVmax of the vertebra was more than twice as high as RCC. This report indicates importance of quantitative assessment of FDG uptake, as well as combined use of MRI.
    MeSH term(s) Carcinoma, Renal Cell/pathology ; Diagnosis, Differential ; Endothelial Cells/pathology ; Female ; Fluorodeoxyglucose F18 ; Hemangioma/diagnostic imaging ; Humans ; Kidney Neoplasms/pathology ; Male ; Middle Aged ; Neoplasm Metastasis ; Positron Emission Tomography Computed Tomography ; Spinal Neoplasms/diagnostic imaging
    Chemical Substances Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2020-12-14
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 197628-x
    ISSN 1536-0229 ; 0363-9762
    ISSN (online) 1536-0229
    ISSN 0363-9762
    DOI 10.1097/RLU.0000000000003428
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Sigmoid colon tumor with G-nas mutation presenting unique morphology.

    Sudo, Gota / Aoki, Hironori / Omori, Yuko / Suzuki, Hiromu / Nakase, Hiroshi

    Gastrointestinal endoscopy

    2020  Volume 92, Issue 5, Page(s) 1133–1135

    MeSH term(s) Colon, Sigmoid/diagnostic imaging ; Humans ; Mutation ; Plant Extracts ; Sigmoid Neoplasms/diagnostic imaging ; Sigmoid Neoplasms/genetics ; Sigmoid Neoplasms/surgery
    Chemical Substances Plant Extracts ; nas (64706-31-6)
    Language English
    Publishing date 2020-06-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 391583-9
    ISSN 1097-6779 ; 0016-5107
    ISSN (online) 1097-6779
    ISSN 0016-5107
    DOI 10.1016/j.gie.2020.06.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Case report of portal hepatic schwannoma: presentation of multimodality images.

    Amano, Maki / Amano, Yasuo / Takagi, Ryo / Tang, Xiaoyan / Omori, Yuko / Okada, Masahiro

    BMC gastroenterology

    2021  Volume 21, Issue 1, Page(s) 183

    Abstract: Background: Portal hepatic schwannoma is a rare benign tumor and difficult to diagnose preoperatively because of its rarity and imaging manifestations that mimic malignancy. We present a case of portal hepatic schwannoma that showed moderate contrast ... ...

    Abstract Background: Portal hepatic schwannoma is a rare benign tumor and difficult to diagnose preoperatively because of its rarity and imaging manifestations that mimic malignancy. We present a case of portal hepatic schwannoma that showed moderate contrast enhancement on computed tomography (CT), extension along the bile duct on T2-weighted imaging and magnetic resonance cholangiopancreatography (MRCP), and uptake of
    Case presentation: Ultrasonography at an annual health checkup identified a hepatic mass in a 38-year-old woman. CT showed a well-defined portal hepatic tumor with mild contrast enhancement. T2-weighted imaging and MRCP showed a clavate tumor extending along the intrahepatic bile ducts but no dilatation of the ducts. The tumor exhibited increased FDG uptake, such as maximum standardized uptake values of 5.0 and 6.5 in the early and late phases, respectively. Neither dilatation of intrahepatic bile ducts nor lymphadenopathy was identified, and the multimodality imaging suggested hepatic portal lymphoma, gastrointestinal tumor, or IgG4-related disease rather than cholangiocarcinoma. A needle biopsy via endoscopic ultrasonography was performed, and immunohistology confirmed the tumor as a schwannoma.
    Conclusions: The diagnosis of a portal hepatic schwannoma requires immunohistological examinations in addition to multimodality imaging studies to reflect fully the pathohistological characteristics of the tumor.
    MeSH term(s) Adult ; Bile Duct Neoplasms/diagnostic imaging ; Bile Ducts, Intrahepatic/diagnostic imaging ; Cholangiocarcinoma/diagnostic imaging ; Female ; Humans ; Magnetic Resonance Imaging ; Multimodal Imaging ; Neurilemmoma/diagnostic imaging ; Neurilemmoma/surgery
    Language English
    Publishing date 2021-04-20
    Publishing country England
    Document type Case Reports ; Journal Article
    ISSN 1471-230X
    ISSN (online) 1471-230X
    DOI 10.1186/s12876-021-01767-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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