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Tanaka Y, Ota R, Hirata A, Yokoyama S, Nakagawa C, Uno T, Hosomi K. Effect of baseline urinary glucose levels on the relationship between sodium-glucose cotransporter 2 inhibitors and serum uric acid in Japanese patients with type 2 diabetes mellitus. Pharmazie 2023; 78:238-244. [PMID: 38178282 DOI: 10.1691/ph.2023.3602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
In patients with type 2 diabetes mellitus (T2DM), controlling serum uric acid (SUA) and blood glucose levels is important. Moreover, sodium-glucose cotransporter 2 (SGLT2) inhibitors decrease SUA levels by accelerating urinary uric acid excretion. We investigated the effect of baseline urinary glucose levels on the relationship between SGLT2 inhibitors and SUA levels. We conducted a retrospective observational study using the electronic medical records of patients with T2DM of Kindai University Nara Hospital (April 2013 to March 2022). We divided the patients into two groups according to their baseline urinary glucose levels: the N-UG group, which included patients with negative urinary glucose strip test results (-), and the P-UG group, which included patients with positive urinary glucose strip test results (± or more). The changes in SUA levels before and after SGLT2 inhibitor administration were investigated. For comparison, the changes in SUA levels before and after the prescription of antidiabetic agents, excluding SGLT2 inhibitors, were also investigated. Our results revealed that SGLT2 inhibitors significantly decreased the SUA levels in patients in the N-UG group but tended to decrease its levels in those in the P-UG group. Regardless of the urinary glucose status at baseline, the administration of SGLT2 inhibitors may be useful for patients with T2DM to prevent the complications of hyperuricemia.
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Affiliation(s)
- Y Tanaka
- Division of Drug Informatics, School of Pharmacy, Kindai University, Osaka; Department of Pharmacy , Kindai University Nara Hospital, Nara, Japan
| | - R Ota
- Department of Pharmacy, Kindai University Nara Hospital, Nara, Japan
| | - A Hirata
- Department of Pharmacy, Kindai University Nara Hospital, Nara, Japan
| | - S Yokoyama
- Division of Drug Informatics, School of Pharmacy, Kindai University, Osaka
| | - C Nakagawa
- Division of Drug Informatics, School of Pharmacy, Kindai University, Osaka; Department of Pharmacy , Kindai University Nara Hospital, Nara, Japan
| | - T Uno
- Division of Drug Informatics, School of Pharmacy, Kindai University, Osaka
| | - K Hosomi
- Division of Drug Informatics, School of Pharmacy, Kindai University, Osaka
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Ohashi A, Kataoka M, Iima M, Honda M, Ota R, Urushibata Y, Dominik Nickel M, Toi M, Zackrisson S, Nakamoto Y. A multiparametric approach to predict triple-negative breast cancer including parameters derived from ultrafast dynamic contrast-enhanced MRI. Eur Radiol 2023; 33:8132-8141. [PMID: 37286791 DOI: 10.1007/s00330-023-09730-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 03/12/2023] [Accepted: 03/21/2023] [Indexed: 06/09/2023]
Abstract
OBJECTIVE Triple-negative breast cancer (TNBC) is a highly proliferative breast cancer subtype. We aimed to identify TNBC among invasive cancers presenting as masses using maximum slope (MS) and time to enhancement (TTE) measured on ultrafast (UF) DCE-MRI, ADC measured on DWI, and rim enhancement on UF DCE-MRI and early-phase DCE-MRI. METHODS This retrospective single-center study, between December 2015 and May 2020, included patients with breast cancer presenting as masses. Early-phase DCE-MRI was performed immediately after UF DCE-MRI. Interrater agreements were evaluated using the intraclass correlation coefficient (ICC) and Cohen's kappa. Univariate and multivariate logistic regression analyses of the MRI parameters, lesion size, and patient age were performed to predict TNBC and create a prediction model. The programmed death-ligand 1 (PD-L1) expression statuses of the patients with TNBCs were also evaluated. RESULTS In total, 187 women (mean age, 58 years ± 12.9 [standard deviation]) with 191 lesions (33 TNBCs) were evaluated. The ICC for MS, TTE, ADC, and lesion size were 0.95, 0.97, 0.83, and 0.99, respectively. The kappa values of rim enhancements on UF and early-phase DCE-MRI were 0.88 and 0.84, respectively. MS on UF DCE-MRI and rim enhancement on early-phase DCE-MRI remained significant parameters after multivariate analyses. The prediction model created using these significant parameters yielded an area under the curve of 0.74 (95% CI, 0.65, 0.84). The PD-L1-expressing TNBCs tended to have higher rim enhancement rates than the non-PD-L1-expressing TNBCs. CONCLUSION A multiparametric model using UF and early-phase DCE-MRI parameters may be a potential imaging biomarker to identify TNBCs. CLINICAL RELEVANCE STATEMENT Prediction of TNBC or non-TNBC at an early point of diagnosis is crucial for appropriate management. This study offers the potential of UF and early-phase DCE-MRI to offer a solution to this clinical issue. KEY POINTS • It is crucial to predict TNBC at an early clinical period. • Parameters on UF DCE-MRI and early-phase conventional DCE-MRI help in predicting TNBC. • Prediction of TNBC by MRI may be useful in determining appropriate clinical management.
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Affiliation(s)
- Akane Ohashi
- Department of Translational Medicine, Diagnostic Radiology, Lund University, Malmö, Sweden
- Department of Imaging and Functional Medicine, Skåne University Hospital, Malmö, Sweden
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-Cho Shogoin Sakyo-Ku, Kyoto-Shi, Kyoto, Japan
| | - Masako Kataoka
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-Cho Shogoin Sakyo-Ku, Kyoto-Shi, Kyoto, Japan.
| | - Mami Iima
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-Cho Shogoin Sakyo-Ku, Kyoto-Shi, Kyoto, Japan
- Institute of Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, Kyoto, Japan
| | - Maya Honda
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-Cho Shogoin Sakyo-Ku, Kyoto-Shi, Kyoto, Japan
- Department of Diagnostic Radiology, Kansai Electric Power Hospital, Osaka, Japan
| | - Rie Ota
- Department of Radiology, Tenri Hospital, Nara, Japan
| | | | | | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Sophia Zackrisson
- Department of Translational Medicine, Diagnostic Radiology, Lund University, Malmö, Sweden
- Department of Imaging and Functional Medicine, Skåne University Hospital, Malmö, Sweden
| | - Yuji Nakamoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-Cho Shogoin Sakyo-Ku, Kyoto-Shi, Kyoto, Japan
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Honda M, Iima M, Kataoka M, Fukushima Y, Ota R, Ohashi A, Toi M, Nakamoto Y. Biomarkers Predictive of Distant Disease-free Survival Derived from Diffusion-weighted Imaging of Breast Cancer. Magn Reson Med Sci 2023; 22:469-476. [PMID: 35922924 PMCID: PMC10552669 DOI: 10.2463/mrms.mp.2022-0060] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 06/12/2022] [Indexed: 11/09/2022] Open
Abstract
PURPOSE To investigate whether intravoxel incoherent motion (IVIM) and/or non-Gaussian diffusion parameters are associated with distant disease-free survival (DDFS) in patients with invasive breast cancer. METHODS From May 2013 to March 2015, 101 patients (mean age 60.0, range 28-88) with invasive breast cancer were evaluated prospectively. IVIM parameters (flowing blood volume fraction [fIVIM] and pseudodiffusion coefficient [D*]) and non-Gaussian diffusion parameters (theoretical apparent diffusion coefficient [ADC] at a b value of 0 s/mm2 [ADC0] and kurtosis [K]) were estimated using a diffusion-weighted imaging series of 16 b values up to 2500 s/mm2. Shifted ADC values (sADC200-1500) and standard ADC values (ADC0-800) were also calculated. The Kaplan-Meier method was used to generate survival analyses for DDFS, which were compared using the log-rank test. Univariable Cox proportional hazards models were used to assess any associations between each parameter and distant metastasis-free survival. RESULTS The median observation period was 80 months (range, 35-92 months). Among the 101 patients, 12 (11.9%) developed distant metastasis, with a median time to metastasis of 79 months (range, 10-92 months). Kaplan-Meier analysis showed that DDFS was significantly shorter in patients with K > 0.98 than in those with K ≤ 0.98 (P = 0.04). Cox regression analysis showed a marginal statistical association between K and distant metastasis-free survival (P = 0.05). CONCLUSION Non-Gaussian diffusion may be associated with prognosis in invasive breast cancer. A higher K may be a marker to help identify patients at an elevated risk of distant metastasis, which could guide subsequent treatment.
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Affiliation(s)
- Maya Honda
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
- Department of Diagnostic Radiology, Kansai Electric Power Hospital, Osaka, Osaka, Japan
| | - Mami Iima
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
- Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, Kyoto, Kyoto, Japan
| | - Masako Kataoka
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
| | - Yasuhiro Fukushima
- Department of Applied Medical Imaging, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Rie Ota
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
| | - Akane Ohashi
- Department of Translational Medicine, Diagnostic Radiology, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
| | - Yuji Nakamoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
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Ota R, Kataoka M, Iima M, Honda M, Kishimoto AO, Miyake KK, Yamada Y, Takeuchi Y, Toi M, Nakamoto Y. Evaluation of breast lesions based on modified BI-RADS using high-resolution readout-segmented diffusion-weighted echo-planar imaging and T2/T1-weighted image. Magn Reson Imaging 2023; 98:132-139. [PMID: 36608911 DOI: 10.1016/j.mri.2022.12.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 12/31/2022] [Indexed: 01/09/2023]
Abstract
PURPOSE To evaluate the diagnostic performance of a non-contrast magnetic resonance imaging (MRI) protocol combining high-resolution diffusion-weighted images (HR-DWI) using readout-segmented echo planar imaging, T1-weighted imaging (T1WI), and T2-weighted imaging (T2WI), using our modified Breast Imaging-Reporting and Data System (modified BI-RADS). METHODS Two experienced radiologists, blinded to the final pathological diagnosis, categorized a total of 108 breast lesions (61 malignant and 47 benign) acquired with the above protocol using the modified BI-RADS with a diagnostic decision tree. The decision tree included subcategories of category 4, as in mammography (categories 2, 3, 4A, 4B, 4C, and 5). These results were compared with the pathological diagnoses. RESULTS The area under the ROC curve (AUC) was 0.89 (95% confidence interval [CI]: 0.83-0.95) for reader 1, and 0.89 (95% CI: 0.82-0.96) for reader 2. When categories 4C and above were classified as malignant, the sensitivity, specificity, and accuracy were 73.8%, 93.6%, and 82.4%, for reader 1; and 82.0%, 89.4%, and 85.2% for reader 2, respectively. CONCLUSION Our results suggest that using HR-DWI, T1WI/T2WI analyzed with a modified BI-RADS and a decision tree showed promising diagnostic performance in breast lesions, and is worthy of further study.
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Affiliation(s)
- Rie Ota
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University graduate school of medicine, Kyoto, Japan; Department of Radiology, Tenri Hospital, Nara, Japan
| | - Masako Kataoka
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University graduate school of medicine, Kyoto, Japan.
| | - Mami Iima
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University graduate school of medicine, Kyoto, Japan; Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, Kyoto, Japan
| | - Maya Honda
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University graduate school of medicine, Kyoto, Japan; Department of Diagnostic Radiology, Kansai Electric Power Hospital, Osaka, Japan
| | - Ayami Ohno Kishimoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University graduate school of medicine, Kyoto, Japan; Department of Radiology, Rakuwakai Otowa Hospital, Kyoto, Japan
| | - Kanae Kawai Miyake
- Department of Advanced Medical Imaging and Research, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yosuke Yamada
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - Yasuhide Takeuchi
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Hospital, Kyoto, Japan
| | - Yuji Nakamoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University graduate school of medicine, Kyoto, Japan
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Ohashi A, Kataoka M, Iima M, Honda M, Ota R, Urushibata Y, Nickel MD, Toi M, Zackrisson S, Nakamoto Y. Comparison of Ultrafast Dynamic Contrast-Enhanced (DCE) MRI with Conventional DCE MRI in the Morphological Assessment of Malignant Breast Lesions. Diagnostics (Basel) 2023; 13:diagnostics13061105. [PMID: 36980417 PMCID: PMC10046990 DOI: 10.3390/diagnostics13061105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/01/2023] [Accepted: 03/07/2023] [Indexed: 03/17/2023] Open
Abstract
Ultrafast (UF) dynamic contrast-enhanced (DCE)-MRI offers the potential for a faster and, therefore, less expensive examination of breast lesions; however, there are no reports that have evaluated whether UF DCE-MRI can be used the same as conventional DCE-MRI in the reading of morphological information. This study evaluated the agreement in morphological information obtained from malignant breast mass lesions between UF DCE-MRI and conventional DCE-MRI. UF DCE-MRI data were obtained over the first 60 s post-contrast injection, followed by the conventional DCE images. Two readers evaluated the size and morphology of the lesions in the final phase of the UF DCE-MRI and the early phase of the conventional DCE-MRI. Inter-method agreement in morphological information was evaluated for the two readers using the intraclass correlation coefficient for size, and the kappa statistics for the morphological descriptors. Differences in the proportion of each descriptor were examined using Fisher’s test of independence. Most inter-method agreements were higher than substantial. UF DCE-MRI showed a circumscribed margin and homogeneous enhancement more often than conventional imaging. However, the percentages of readings showing the same morphology assessment between the UF DCE-MRI and conventional DCE-MRI were 71.2% (136/191) for Reader 1 and 69.1% (132/191) for Reader 2. We conclude that UF DCE-MRI may replace conventional DCE-MRI to evaluate the morphological information of malignant breast mass lesions.
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Affiliation(s)
- Akane Ohashi
- Department of Translational Medicine, Diagnostic Radiology, Lund University, 225 02 Malmö, Sweden
- Department of Imaging and Functional Medicine, Skåne University Hospital, 225 02 Malmö, Sweden
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
| | - Masako Kataoka
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
- Correspondence: ; Tel.: +81-75-751-3760
| | - Mami Iima
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
- Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, Kyoto 606-8507, Japan
| | - Maya Honda
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
- Department of Diagnostic Radiology, Kansai Electric Power Hospital, Osaka 553-0003, Japan
| | - Rie Ota
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
- Department of Radiology, Tenri Hospital, Nara 632-8552, Japan
| | | | | | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
| | - Sophia Zackrisson
- Department of Translational Medicine, Diagnostic Radiology, Lund University, 225 02 Malmö, Sweden
- Department of Imaging and Functional Medicine, Skåne University Hospital, 225 02 Malmö, Sweden
| | - Yuji Nakamoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
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Ota R, Kataoka M, Iima M, Honda M, Ohashi A, Ohno Kishimoto A, Kawai Miyake K, Yamada Y, Takeuchi Y, Toi M, Nakamoto Y. Evaluation of pathological complete response after neoadjuvant systemic treatment of invasive breast cancer using diffusion-weighted imaging compared with dynamic contrast-enhanced based kinetic analysis. Eur J Radiol 2022; 154:110372. [DOI: 10.1016/j.ejrad.2022.110372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 04/21/2022] [Accepted: 05/23/2022] [Indexed: 11/29/2022]
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Yamashiro K, Hirata A, Ota R, Ogata F, Nakamura T, Kawasaki N. Time-dependent changes in serum magnesium levels in patients receiving cetuximab with low baseline serum sodium levels. Pharmazie 2021; 76:625-628. [PMID: 34986961 DOI: 10.1691/ph.2021.1834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Cetuximab causes electrolyte abnormalities, such as hypomagnesemia, hypokalemia, and hypocalcemia. However, little is known about the relationships between the onset of hypomagnesemia, patient background before administration, and time-dependent changes in serum magnesium levels. Therefore, we examined the patient backgrounds that influenced the onset of hypomagnesemia and the time-dependent changes in serum magnesium levels in patients receiving cetuximab. A retrospective study was performed to investigate patients with advanced or recurrent colorectal cancer or head and neck cancer, treated with a cetuximab regimen from 2012 to 2020 at Kindai University Nara Hospital. In total, 52 patients who met the inclusion criteria were enrolled in this study. The serum magnesium level was significantly lower in the hyponatremia before the administration group than in the non-hyponatremia group (p < 0.001). Univariate logistic regression analysis revealed that the baseline serum sodium levels (odds ratio [OR]: 0.741, 95% confidence interval [CI]: 0.588-0.934) and the combination of magnesium oxide tablet (OR: 0.997, 95% CI: 0.995-0.999) were one of the independent factors for hypomagnesemia. These results indicated that hyponatremia before administration may be an indicator of serum magnesium levels after administration of cetuximab. Cetuximab-induced hypomagnesemia may be predicted using baseline serum sodium levels, and hypomagnesemia may be prevented by administration of magnesium oxide tablets. Our findings provided new evidence for the management of serum magnesium levels in patients receiving cetuximab.
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Affiliation(s)
- K Yamashiro
- Faculty of Pharmacy, Kindai University, Osaka, Japan; Department of Pharmacy, Kindai University Nara Hospital, Nara, Japan
| | - A Hirata
- Department of Pharmacy, Kindai University Nara Hospital, Nara, Japan
| | - R Ota
- Department of Pharmacy, Kindai University Nara Hospital, Nara, Japan
| | - F Ogata
- Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - T Nakamura
- Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - N Kawasaki
- Faculty of Pharmacy, Kindai University, Osaka, Japan;,
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Iima M, Kataoka M, Honda M, Ohashi A, Ohno Kishimoto A, Ota R, Uozumi R, Urushibata Y, Feiweier T, Toi M, Nakamoto Y. The Rate of Apparent Diffusion Coefficient Change With Diffusion Time on Breast Diffusion-Weighted Imaging Depends on Breast Tumor Types and Molecular Prognostic Biomarker Expression. Invest Radiol 2021; 56:501-508. [PMID: 33660629 DOI: 10.1097/rli.0000000000000766] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTION The aim of this study was to investigate the variation of apparent diffusion coefficient (ADC) values with diffusion time according to breast tumor type and prognostic biomarkers expression. MATERIALS AND METHODS A total of 201 patients with known or suspected breast tumors were prospectively enrolled in this study, and 132 breast tumors (86 malignant and 46 benign) were analyzed. Diffusion-weighted imaging scans with 2 diffusion times were acquired on a clinical 3-T magnetic resonance imaging scanner using oscillating and pulsed diffusion-encoding gradients (effective diffusion times, 4.7 and 96.6 milliseconds) and b values of 0 and 700 s/mm2. Diagnostic performances to differentiate malignant and benign breast tumors for ADC values at short and long diffusion times (ADCshort and ADClong), ΔADC (the rate of change in ADC values with diffusion time), ADC0-1000 (ADC value from a standard protocol), and standard reading including dynamic contrast-enhanced magnetic resonance imaging (BI-RADS) were investigated. The correlations of ADCshort, ADClong, and ΔADC values with hormone receptor expression and breast cancer subtypes were also analyzed. RESULTS The ADC values were lower, and ΔADC was higher in malignant tumors compared with benign tumors. The specificity of ADC values at all diffusion times and ΔADC values for differentiating malignant and benign breast tumors was superior to that of BI-RADS (87.0%-95.7% vs 73.9%), whereas the sensitivity was inferior (87.2%-90.7% vs 100%). Lower ADCshort and ADC0-1000 in ER-positive compared with ER-negative cancers (false discovery rate [FDR]-adjusted P = 0.037 and 0.018, respectively) and lower ADCshort, ADClong, and ADC0-1000 in progesterone receptor-positive compared with progesterone receptor-negative cancers (FDR-adjusted P = 0.037, 0.036, and 0.018, respectively) were found. Ki-67-positive cancers had larger ΔADCs than Ki-67-negative cancers (FDR-adjusted P = 0.018). CONCLUSIONS The ADC values vary with different diffusion time and vary in correlation with molecular biomarkers, especially Ki-67. Those results suggest that the diffusion time, which should be reported, might be a useful parameter to consider for breast cancer management.
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Affiliation(s)
| | - Masako Kataoka
- From the Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine
| | - Maya Honda
- From the Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine
| | | | | | - Rie Ota
- From the Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine
| | - Ryuji Uozumi
- Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | | | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yuji Nakamoto
- From the Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine
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Ota R, Nakajima K, Ogawa I, Tamagawa Y, Kwon SI, Berg E, Cherry SR, Shimoi H, Hasegawa Y, Nishizawa H, Shimano K, Hasegawa T. Lead-free MCP to improve coincidence time resolution and reduce MCP direct interactions. Phys Med Biol 2021; 66:064006. [PMID: 33636710 DOI: 10.1088/1361-6560/abea2c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Achieving direct imaging of the annihilation position of a positron on an event-by-event basis using an ultrafast detector would have a great impact on the field of nuclear medicine. Cherenkov emission is the most attractive physical phenomenon for realizing such an ultrafast timing performance. Moreover, a microchannel-plate photomultiplier tube (MCP-PMT) is one of the most promising photodetectors for fully exploiting the fast timing properties of Cherenkov emission owing to its excellent single photon time resolution of 25 ps full width at half maximum (FWHM). However, as the MCP structure generally contains a lead compound, the gamma rays frequently and directly interact with the MCP, resulting in the degradation of its timing performance and generation of undesirable side peaks in its coincidence timing histogram. To overcome this problem, we have developed a new MCP-PMT based on an MCP consisting of borosilicate glass, thus drastically reducing the probability of the photoelectric effect occurring in the MCP. To evaluate its insensitivity to gamma rays and its timing performance, a coincidence experiment was performed and showed that the probability of direct interactions was reduced by a factor of 3.4. Moreover, a coincidence time resolution of 35.4 ± 0.4 ps FWHM, which is equivalent to a position resolution of 5.31 mm, was obtained without any pulse height/area cut, improving to 28.7 ± 3.0 ps when selecting on the highest amplitude events by careful optimization of the voltage divider circuit of the new MCP-PMT. The timing performance of this new MCP-PMT presents an important step toward making direct imaging possible.
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Affiliation(s)
- R Ota
- Central Research Laboratory, Hamamatsu Photonics K. K., Hamamatsu, Japan
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Ote K, Hashimoto F, Kakimoto A, Isobe T, Inubushi T, Ota R, Tokui A, Saito A, Moriya T, Omura T, Yoshikawa E, Teramoto A, Ouchi Y. Kinetics-Induced Block Matching and 5-D Transform Domain Filtering for Dynamic PET Image Denoising. IEEE Trans Radiat Plasma Med Sci 2020. [DOI: 10.1109/trpms.2020.3000221] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Honda M, Kataoka M, Kawaguchi K, Iima M, Miyake KK, Kishimoto AO, Ota R, Ohashi A, Toi M, Nakamoto Y. Subcategory classifications of Breast Imaging and Data System (BI-RADS) category 4 lesions on MRI. Jpn J Radiol 2020; 39:56-65. [PMID: 32870440 DOI: 10.1007/s11604-020-01029-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/09/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE Category 4 in BI-RADS for magnetic resonance imaging (MRI) has a wide range of probabilities of malignancy, extending from > 2 to < 95%. We classified category 4 lesions into three subcategories and analyzed the positive predictive value (PPV) of malignancy in a tertiary hospital. MATERIALS AND METHODS This retrospective study included 346 breast MRIs with 434 category 2-5 lesions. All enhancing lesions were classified as category 2 (0% probability of malignancy), 3 (> 0%, ≤ 2%), 4 (> 2%, < 95%) and 5 (≥ 95%); category 4 lesions were further subcategorized into 4A (> 2%, ≤ 10%), 4B (> 10%, ≤ 50%) and 4C (> 50%, < 95%) at the time of diagnosis. Radiological and pathological reports were retrospectively analyzed, and the PPVs were calculated. RESULTS We included 149 malignant and 285 benign lesions. The PPVs of subcategories 4A, 4B and 4C were 1.8%, 11.8% and 67.5%, respectively. The PPVs were higher for lesions coexisting with category 5 or 6 lesions compared with those for isolated lesions. CONCLUSION Category 4 lesions can be classified into three subcategories depending on the likelihood of malignancy. Lesions coexisting with category 5 or 6 lesions are more likely to be malignant.
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Affiliation(s)
- Maya Honda
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Masako Kataoka
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Kosuke Kawaguchi
- Department of Breast Surgery, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Mami Iima
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan.,Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-7507, Japan
| | - Kanae Kawai Miyake
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Ayami Ohno Kishimoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Rie Ota
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Akane Ohashi
- Department of Radiology, National Hospital Organization Kyoto Medical Center, 1-1, Fukakushamukaihatacho, Fishimi-ku, Kyoto, 612-8555, Japan
| | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Yuji Nakamoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
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Kishimoto AO, Kataoka M, Iima M, Honda M, Miyake KK, Ohashi A, Ota R, Kataoka T, Sakurai T, Toi M, Togashi K. Evaluation of Malignant Breast Lesions Using High-resolution Readout-segmented Diffusion-weighted Echo-planar Imaging: Comparison with Pathology. Magn Reson Med Sci 2020; 20:204-215. [PMID: 32611938 PMCID: PMC8203479 DOI: 10.2463/mrms.mp.2020-0021] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
PURPOSE We aimed to investigate the performance of high resolution-diffusion-weighted imaging (HR-DWI) using readout-segmented echo-planar imaging in visualizing malignant breast lesions and evaluating their extent, using pathology as a reference. METHODS This retrospective study included patients who underwent HR-DWI with surgically confirmed malignant breast lesions. Two radiologists blinded to the final diagnosis evaluated HR-DWI independently and identified the lesions, measuring their maximum diameters. Another radiologist confirmed if those lesions were identical to the pathology. The maximum diameters of the lesions between HR-DWI and pathology were compared, and their correlations were calculated using Spearman's correlation coefficient. Apparent diffusion coefficient (ADC) values of the lesions were measured. RESULTS Ninety-five mass/64 non-mass lesions were pathologically confirmed in 104 females. Both radiologists detected the same 93 mass lesions (97.9%). Spearman's correlation coefficient for mass lesions were 0.89 and 0.90 (P < 0.0001 and 0001) for the two radiologists, respectively. The size differences within 10 mm were 90.3% (84/93) and 94.6% (88/93) respectively. One radiologist detected 35 non-mass lesions (54.7%) and another radiologist detected 32 non-mass lesions (50.0%), of which 28 lesions were confirmed as identical. Spearman's correlation coefficient for non-mass lesions were 0.59 and 0.22 (P = 0.0002 and 0.22), respectively. The mean ADC value of mass lesions and non-mass lesions were 0.80 and 0.89 × 10-3 mm2/s, respectively. CONCLUSION Using HR-DWI, malignant mass lesions were depicted with excellent agreement with the pathological evaluation. Approximately half of the non-mass lesions could not be identified, suggesting a current limitation of HR-DWI.
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Affiliation(s)
- Ayami Ohno Kishimoto
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
| | - Masako Kataoka
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
| | - Mami Iima
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University.,Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital
| | - Maya Honda
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
| | - Kanae Kawai Miyake
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
| | - Akane Ohashi
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
| | - Rie Ota
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
| | - Tatsuki Kataoka
- Department of Diagnostic Pathology, Kyoto University Hospital
| | - Takaki Sakurai
- Department of Diagnostic Pathology, Kyoto University Hospital
| | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Hospital
| | - Kaori Togashi
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
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13
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Honda M, Kataoka M, Iima M, Miyake KK, Ohashi A, Kishimoto AO, Ota R, Nickel MD, Toi M, Togashi K. Background parenchymal enhancement and its effect on lesion detectability in ultrafast dynamic contrast-enhanced MRI. Eur J Radiol 2020; 129:108984. [PMID: 32534350 DOI: 10.1016/j.ejrad.2020.108984] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 03/25/2020] [Accepted: 03/30/2020] [Indexed: 12/12/2022]
Abstract
PURPOSE Background parenchymal enhancement (BPE) often affects interpretation of dynamic contrast-enhanced (DCE) MRI. There is limited evidence that reduced BPE is a feature of ultrafast DCE (UF-DCE) MRI. We aimed to evaluate the effect of BPE levels on lesion detectability on UF-DCE MRI in comparison with conventional DCE MRI. METHOD MRIs of 70 patients with histologically proven breast lesions were retrospectively evaluated. The total number of analyzed lesions was 84 (56 malignant and 28 benign). Using 3 T MRI, 20 phases of UF-DCE MRI based on the three-dimensional gradient-echo VIBE sequence combined with a compressed sensing reconstruction were acquired followed by conventional DCE MRI. Three maximum intensity projection (MIP) images were generated from the 12th phase, the 20th phase of UF-DCE MRI and the initial phase of conventional DCE MRI. Two radiologists independently evaluated the degree of BPE and lesion detectability of the three MIP images for each breast with histologically confirmed lesions. The degree of BPE was scored on a four-point scale and lesion detectability (conspicuity and confidence levels) was scored on a three-point scale. Data were analyzed using the Wilcoxon signed-rank test with Bonferroni correction. RESULTS BPE was lower on UF-DCE MRI than on conventional DCE MRI. Lesion detectability was higher on UF-DCE MRI among patients with higher BPE on conventional DCE MRI or premenopausal women. CONCLUSIONS Images with lower BPE can be achieved using UF-DCE MRI and may be advantageous when assessing breast lesions among patients with higher BPE or premenopausal women.
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Affiliation(s)
- Maya Honda
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Masako Kataoka
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Mami Iima
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan; Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-7507, Japan
| | - Kanae Kawai Miyake
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Akane Ohashi
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Ayami Ohno Kishimoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Rie Ota
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Marcel Dominik Nickel
- MR Application Predevelopment, Siemens Healthcare GmbH, Allee am Roethelheimpark 2, 91052, Erlangen, Germany
| | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Kaori Togashi
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
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14
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Ota R, Nakajima K, Ogawa I, Tamagawa Y, Shimoi H, Suyama M, Hasegawa T. Precise analysis of the timing performance of Cherenkov-radiator-integrated MCP-PMTs: analytical deconvolution of MCP direct interactions. ACTA ACUST UNITED AC 2020; 65:10NT03. [DOI: 10.1088/1361-6560/ab8c8f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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15
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Kishimoto AO, Kataoka M, Iima M, Honda M, Miyake KK, Ohashi A, Ota R, Kataoka T, Sakurai T, Toi M, Togashi K. The comparison of high-resolution diffusion weighted imaging (DWI) with high-resolution contrast-enhanced MRI in the evaluation of breast cancers. Magn Reson Imaging 2020; 71:161-169. [PMID: 32320723 DOI: 10.1016/j.mri.2020.03.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/28/2020] [Accepted: 03/25/2020] [Indexed: 01/01/2023]
Abstract
PURPOSE We sought to investigate the performance of high resolution (HR) diffusion-weighted imaging (DWI) using readout-segmented echo-planar imaging (rs-EPI), compared with high-resolution contrast-enhanced MRI (HR CE-MRI) in terms of morphological accuracy, on the basis of the Breast Imaging and Reporting and Data System (BI-RADS) MRI descriptors and lesion size. METHODS This retrospective study included the image data of 94 patients with surgically confirmed malignant breast lesions who had undergone high resolution diffusion-weighted imaging (HR-DWI) and HR CE-MRI. Two radiologists blinded to the final diagnosis independently identified the lesions on HR-DWI, described the morphology of the lesions according to BI-RADS descriptors, and measured lesion size. HR CE-MRI was subsequently evaluated using the same procedure. The inter-method agreement of the morphology was assessed using kappa statistics. Correlation on size was also assessed. RESULTS Reader A detected 79 mass lesions and 37 non-mass lesions on HR-DWI and HR CE-MRI. Reader B detected 81 mass lesions and 33 non-mass lesions on HR-DWI and HR CE-MRI. Very high agreement (kappa = 0.81-0.89, p < .05) was observed in the shape and margin assessment of mass lesions, where agreement on internal enhancement/signals was moderate to substantial (kappa = 0.43-0.61, p < .05). Disagreement was mostly seen in the evaluation of rim enhancement. High agreement was observed for non-mass lesion distribution (kappa = 0.76-0.84, p < .05), and agreement on internal enhancement/signals was moderate to fair (kappa = 0.34-0.49, p < .05). Agreement among heterogeneous, clumped, and clustered-ring patterns was variable. Size assessment showed very strong correlation both in mass (Spearman's rho = 0.90-0.96, p < .0001) and non-mass lesions (Spearman's rho = 0.86, p < .0001). CONCLUSIONS The findings in morphology and lesion extent showed high agreement between HR-DWI and HR CE-MRI for malignant breast lesions. These results imply the potential of applying HR-DWI for evaluation of malignant breast lesions using BI-RADS MRI.
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Affiliation(s)
- Ayami Ohno Kishimoto
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masako Kataoka
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Mami Iima
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan; Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Maya Honda
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kanae Kawai Miyake
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Akane Ohashi
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Rie Ota
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Tatsuki Kataoka
- Department of Diagnostic Pathology, Kyoto University Hospital, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Takaki Sakurai
- Department of Diagnostic Pathology, Kyoto University Hospital, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masakazu Toi
- Department of Breast Surgery, Kyoto University Hospital, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kaori Togashi
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
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16
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Ota R, Nakajima K, Ogawa I, Tamagawa Y, Shimoi H, Suyama M, Hasegawa T. Coincidence time resolution of 30 ps FWHM using a pair of Cherenkov-radiator-integrated MCP-PMTs. ACTA ACUST UNITED AC 2019; 64:07LT01. [DOI: 10.1088/1361-6560/ab0fce] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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17
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Tateishi Y, Kanamoto T, Nakaoka K, Fukushima K, Kitanosono H, Shima T, Ota R, Nagaoka A, Yoshimura S, Miyazaki T, Shiraishi H, Morofuji Y, Horie N, Izumo T, Tsujino A. Abstract WP273: Transesophageal and Transthoracic Echocardiography for Detecting Risk and Prognostic Factors in Embolic Stroke of Undetermined Source. Stroke 2019. [DOI: 10.1161/str.50.suppl_1.wp273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
It is unclear whether biomarkers of cardiac dysfunction are associated with embolic stroke of undetermined source (ESUS), while large patent foramen ovale (PFO) could relate to it.
Method:
We retrospectively review patients with ischemic stroke who underwent transesophageal echocardiography (TEE) from April 2012, to April 2018. The peak transmitral filling velocity/early diastolic mitral annular tissue velocity (E/e’) on transthoracic echocardiography was used to estimate diastolic dysfunction. PFO and left atrial appendage (LAA) flow velocity were evaluated by TEE. We compared risk factors, clinical characteristics and biomarkers of cardiac dysfunction (brain natriuretic peptide [BNP], left atrial diameter, E/e’, the presence of systolic dysfunction [EF<40%], and LAA flow velocity) adjusted for age and sex between ESUS with and without large PFO. We evaluated outcome at 90 days of ESUS patients who had biomarkers of cardiac dysfunction compared to that of ESUS patients with large PFO.
Results:
Among 294 patients with ESUS, 163 patients underwent TEE (55%). Of these, 24 patients (15%) had large PFO. Compared with ESUS patients with large PFO, those without large PFO had higher BNP (adjusted odds ratio 1.02, 95% confidence interval; 1.00-1.03, p=0.002) and higher E/e’ (1.25, 1.06-1.48; p=0.003). Left atrial diameter, EF<40% and LAA flow velocity were similar between ESUS with and without large PFO groups. (p=0.165, p=0.622 and p=0.859). ESUS patients without large PFO with both BNP level > 50 pg/ml and E/e’ > 12, which were median values, had worse clinical outcome compared to patients who have less cardiac biomarkers and patients with large PFO. (p=0.005)
Conclusion:
ESUS Patients without large PFO often have biomarkers of cardiac dysfunction. The clinic outcome of ESUS patients without large PFO who have biomarkers of cardiac dysfunction could be worse than that of ESUS patients with large PFO.
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Affiliation(s)
- Yohei Tateishi
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Tadashi Kanamoto
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Kenjiro Nakaoka
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Kaori Fukushima
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Hiroko Kitanosono
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Tomoaki Shima
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Rie Ota
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Atsushi Nagaoka
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | | | | | | | - Yoichi Morofuji
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Nobutaka Horie
- Dept of Neurosurgery, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Tsuyoshi Izumo
- Dept of Neurosurgery, Nagasaki Univ Hosp, Nagasaki, Japan
| | - Akira Tsujino
- Dept of Neurology and Strokology, Nagasaki Univ Hosp, Nagasaki, Japan
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18
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Tateishi Y, Kanamoto T, Nakaoka K, Fukushima K, Kitanosono H, Ota R, Nonaka T, Nagaoka A, Yoshimura S, Miyazaki T, Shiraishi H, Morofuji Y, Horie N, Izumo T, Tsujino A. Neurological symptoms on arrival to predict large vessel occlusion or surgical treatment of intracerebral hemorrhage. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Fukushima K, Yoshimura S, Shiraishi H, Miyazaki T, Nagaoka A, Nonaka T, Ueno M, Ota R, Tateishi Y, Kanamoto T, Nakaoka K, Tsujino A. Effectiveness of selective plasma exchange therapy (SePE) in patients with myasthenia gravis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Nishimura K, Ota R, Mikajiri Y, Takahashi K, Sugishima S, Eto T. Useful laboratory markers for the diagnosis of bone marrow involvement by malignant lymphoma. Int J Lab Hematol 2017; 40:34-40. [PMID: 28876549 DOI: 10.1111/ijlh.12725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 07/03/2017] [Indexed: 01/01/2023]
Abstract
INTRODUCTION This study aimed to investigate the effect of bone marrow involvement by malignant lymphoma (BMI) on laboratory data and to determine the useful laboratory markers for diagnosing BMI. METHODS We compared laboratory data between patients with and without BMI. We performed multivariate logistic regression and receiver operating characteristic (ROC) analyses to evaluate the diagnostic values of independent predictors. RESULTS In the BMI group, platelets in peripheral blood (PLT) and megakaryocyte count in bone marrow (MgK) were significantly lower than those in the non-BMI group (PLT, P < .0001; MgK, P = .0384). The rate of peripheral blood involvement by malignant lymphoma (PBI), red blood cell distribution width (RDW), D-dimer (DD), soluble interleukin-2 receptor (sIL2R), aspartate aminotransferase (AST), and lactate dehydrogenase (LDH) was significantly higher in the BMI group than in the non-BMI group (PBI, P < .0001; RDW, P = .0190; DD, P = .0006; sIL2R, P < .0001; AST, P = .0256; LDH, P = .0002). In multivariate analysis, PBI, PLT, sIL2R, and MgK levels were independent predictors of BMI. CONCLUSION PBI, PLT, sIL2R, and MgK may be the useful laboratory markers for BMI diagnosis.
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Affiliation(s)
- K Nishimura
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.,Department of Clinical Laboratory, Hamanomachi Hospital, Fukuoka, Japan
| | - R Ota
- Department of Clinical Laboratory, Hamanomachi Hospital, Fukuoka, Japan
| | - Y Mikajiri
- Department of Clinical Laboratory, Hamanomachi Hospital, Fukuoka, Japan
| | - K Takahashi
- Department of Clinical Laboratory, Hamanomachi Hospital, Fukuoka, Japan
| | - S Sugishima
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Eto
- Department of Hematology, Hamanomachi Hospital, Fukuoka, Japan
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21
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Ogai K, Matsumoto M, Aoki M, Ota R, Hashimoto K, Wada R, Kobayashi M, Sugama J. Wash or wipe? A comparative study of skin physiological changes between water washing and wiping after skin cleaning. Skin Res Technol 2017; 23:519-524. [PMID: 28295641 DOI: 10.1111/srt.12364] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND/PURPOSE Presently, skin-cleaning agents that claim to be removed by water or wiping alone are commercially available and have been used for the purpose of bed baths. However, there is a lack of knowledge on how water washing and wiping differently affect skin physiological functions or ceramide content. The aim of this study was to compare the effects of water washing and wiping on skin physiological functions and ceramide content. METHODS Three kinds of the cleaning agents with different removal techniques (ie, water washing and wiping) were used in this study. Skin physiological functions (ie, transepidermal water loss, skin hydration, and skin pH) and skin ceramide content were measured before and after seven consecutive days of the application of each cleaning agent. RESULTS No significant differences in skin physiological functions or ceramide content were observed between water washing and wiping. CONCLUSION Cleaning agents that claim to be removed by water washing or wiping do not affect skin physiological functions or ceramide content by either removal method.
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Affiliation(s)
- K Ogai
- Wellness Promotion Science Center, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - M Matsumoto
- Wellness Promotion Science Center, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.,Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - M Aoki
- Wellness Promotion Science Center, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.,Department of Clinical Nursing, Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - R Ota
- Department of Nursing, School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - K Hashimoto
- Department of Nursing, School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - R Wada
- Department of Nursing, School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - M Kobayashi
- Wellness Promotion Science Center, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - J Sugama
- Wellness Promotion Science Center, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.,Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.,Advanced Health Care Science Research Unit, Innovative Integrated Bio-Research Core, Institute for Frontier Science Initiative (InFiniti), Kanazawa University, Kanazawa, Japan
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22
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Hirai H, Yoshizawa T, Morohashi S, Haga T, Wu Y, Ota R, Takatsuna M, Akasaka H, Hakamada K, Kijima H. Clinicopathological significance of gastric poorly differentiated medullary carcinoma. Biomed Res 2017; 37:77-84. [PMID: 27108877 DOI: 10.2220/biomedres.37.77] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Poorly differentiated gastric adenocarcinoma of solid type is known to show a clinicopathological diversity, but its morphological characteristics have rarely been investigated. In this study, we defined poorly differentiated medullary carcinoma indicating the following three characteristics: (i) more than 90% of the entire tumor were composed of poorly differentiated adenocarcinoma in a medullary growth, (ii) the tumor exhibited an expansive growth at the tumor margin, and (iii) special types such as an α-fetoprotein-producing carcinoma, neuroendocrine carcinoma, and carcinoma with lymphoid stroma were excluded. Based on the definition, we subclassified the poorly differentiated gastric adenocarcinoma of solid type into the two groups: medullary carcinoma and non-medullary carcinoma, and clinicopathologically analyzed 23 cases of medullary carcinomas and 38 cases of non-medullary carcinomas. The medullary carcinomas less frequently displayed lymphatic invasion, venous invasion, and lymph node metastasis, compared with the non-medullary carcinoma (P < 0.001, P = 0.002, and P < 0.001, respectively). The patients with medullary carcinomas significantly showed better disease-free survival (P = 0.017). This is the first study to demonstrate that poorly differentiated adenocarcinoma of solid type can be subclassified into tumors with low and high malignant potentials. Gastric poorly differentiated medullary carcinoma is considered to be a novel histological type predicting good patients' prognosis.
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Affiliation(s)
- Hideaki Hirai
- Departments of Pathology and Bioscience, Hirosaki University Graduate School of Medicine
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23
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Ota R, Omura T, Yamada R, Miwa T, Watanabe M. Evaluation of a Sub-Millimeter Resolution PET Detector With a 1.2 mm Pitch TSV-MPPC Array One-to-One Coupled to LFS Scintillator Crystals and Inter-Crystal Scatter Studies With Individual Signal Readout. IEEE Trans Radiat Plasma Med Sci 2017. [DOI: 10.1109/tns.2016.2617334] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Takatsuna M, Morohashi S, Yoshizawa T, Hirai H, Haga T, Ota R, Saito K, Wu Y, Seino H, Aoyagi Y, Terai S, Kijima H. Myofibroblast distribution is associated with invasive growth types of colorectal cancer. Oncol Rep 2016; 36:3154-3160. [PMID: 27779697 PMCID: PMC5112613 DOI: 10.3892/or.2016.5202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 04/07/2016] [Indexed: 11/25/2022] Open
Abstract
Both the invasive growth types of colorectal cancer (CRC) and the number of myofibroblasts have been associated with histopathological factors such as lymph node and liver metastasis, and local recurrence. However, there are few studies, that have assessed the association between invasive growth type and myofibroblast distribution in CRC. We aimed to evaluate the relationship between the clinicopathological factors of CRC and two invasive growth types, the expanding and infiltrating types. We categorized 150 cases of pT3 CRC into the expanding and infiltrating types and measured the myofibroblast density of three histological layers: the submucosa (SM), the muscularis propria (MP) and the subserosa (SS). We compared these two invasive growth types and analyzed the relationship between clinicopathological factors and myofibroblast density. Myofibroblast density was significantly higher in the infiltrating type than that in the expanding type (P<0.05). In the lymph node metastasis-positive group of the infiltrating type, myofibroblast density in MP was significantly higher than that in the lymph node metastasis-negative group (P<0.001). In the infiltrating type, the group with the higher level of lymphatic invasion had a significantly higher density of myofibroblasts in the MP than the group with the lower level of lymphatic invasion (P<0.01). These results suggest that myofibroblasts participate more in the infiltrating type compared with the expanding type of CRC. It would appear that myofibroblasts present in the MP play an important role in the malignant potential of the infiltrating type compared to the expanding type.
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Affiliation(s)
- Masafumi Takatsuna
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Satoko Morohashi
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Tadashi Yoshizawa
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Hideaki Hirai
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Toshihiro Haga
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Rie Ota
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Kensuke Saito
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Yunyan Wu
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Hiroko Seino
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
| | - Yutaka Aoyagi
- Department of Gastroenterology, Niigata Medical Center, Niigata Prefectural Federation of Agricultural Cooperatives for Health and Welfare, Nishi-ku, Niigata 950-2022, Japan
| | - Shuji Terai
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8510, Japan
| | - Hiroshi Kijima
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki 036‑8562, Japan
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Takatsuna M, Morohashi S, Yoshizawa T, Hirai H, Haga T, Ota R, Wu Y, Morohashi H, Hakamada K, Terai S, Kijima H. Myofibroblasts of the muscle layer stimulate the malignant potential of colorectal cancer. Oncol Rep 2016; 36:1251-7. [PMID: 27431808 PMCID: PMC4968616 DOI: 10.3892/or.2016.4932] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 02/17/2016] [Indexed: 01/02/2023] Open
Abstract
Myofibroblasts of colorectal cancer (CRC) have been associated with histopathological factors such as lymph node metastasis, liver metastasis and local recurrence. However, few studies have assessed the association between these malignant potentials and the myofibroblast distribution in CRC. We aimed to evaluate the relationship between clinical factors and myofibroblast distribution around CRC invasive lesions. The study included 121 cases of pT3 CRC that were diagnosed at stage II or III. Myofibroblast density of the following three histological layers was measured: the submucosa (SM), muscularis propria (MP) and subserosa (SS). We analyzed the relationship between the clinicopathological factors and myofibroblast density by studying the histopathological features of the three layers. The myofibroblast density of the MP layer was significantly higher in the groups with high-frequency lymphatic and venous invasion than the groups with low-frequency lymphatic (P<0.001) and venous (P<0.01) invasion, respectively. In the positive lymph node metastasis group, the myofibroblast density at the MP layer was significantly higher than that in the negative lymph node metastasis group (P<0.001). The high myofibroblast density group at the MP layer was significantly associated with poor overall survival (P<0.003). Our study indicated that myofibroblasts are a type of cancer-associated fibroblasts and that the myofibroblast distribution contributes to the malignant potential of CRC. Furthermore, we demonstrated that myofibroblasts present at the MP layer play an important role in the malignant potential and poor prognosis of patients with CRC.
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Affiliation(s)
- Masafumi Takatsuna
- Department of Pathology and Bioscience
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8510, Japan
| | | | | | | | | | - Rie Ota
- Department of Pathology and Bioscience
| | - Yunyan Wu
- Department of Pathology and Bioscience
| | - Hajime Morohashi
- Department of Surgery, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562
| | - Kenichi Hakamada
- Department of Surgery, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562
| | - Shuji Terai
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8510, Japan
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26
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Morohashi S, Yoshizawa T, Seino H, Hirai H, Haga T, Ota R, Wu Y, Yoshida E, Hakamada K, Kijima H. A new histological therapeutic classification system to predict eradicated and residual lymph nodes in breast cancer after neoadjuvant chemotherapy. Oncol Rep 2016; 35:2592-8. [PMID: 26935647 PMCID: PMC4811402 DOI: 10.3892/or.2016.4635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 12/23/2015] [Indexed: 11/24/2022] Open
Abstract
The indication for neoadjuvant chemotherapy (NAC) has recently broadened to include its use in the treatment of initial stage breast cancer. Axillary lymph node metastasis after NAC in breast cancer is a poor prognostic factor. Thus, the prediction of lymph node metastasis is important to estimate the prognosis of breast cancer patients after NAC. Therefore, we focused on residual carcinoma patterns of primary breast tumors after NAC and examined the correlation between the patterns and lymph node metastasis. In this study, we examined 50 breast cancer specimens and associated dissected lymph nodes after NAC. We divided 40 cases into an eradicated lymph node group and a residual lymph node group to analyze residual carcinoma patterns of primary breast tumors. Residual carcinoma patterns were classified according to the cell density of carcinoma cells: dense, focal/nested and sporadic/in-situ. There were significant differences in residual carcinoma patterns (P<0.01) among the three pattern groups. There was a high incidence of dense patterns in the residual lymph node group and a high incidence of sporadic/in-situ patterns in the eradicated lymph node group. Analysis of residual carcinoma patterns of primary breast tumors and clinicopathological factors demonstrated that there were significant differences in tumor reduced ratio on CT (P<0.001), primary tumor area before NAC (P<0.01), primary tumor area after NAC (P<0.00001), intrinsic subtype (P<0.01), Ki-67 labeling index (P<0.01), histological grade (P<0.05) and mitotic count (P<0.01) between the dense and non-dense groups. Therefore, our results suggest that the residual carcinoma pattern is useful for predicting eradicated or residual lymph nodes and the malignant potential in breast cancer after NAC.
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Affiliation(s)
- Satoko Morohashi
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Tadashi Yoshizawa
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Hiroko Seino
- Department of Radiology and Radiation Oncology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Hideaki Hirai
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Toshihiro Haga
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Rie Ota
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Yunyan Wu
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Eri Yoshida
- Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Kenichi Hakamada
- Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Hiroshi Kijima
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
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Affiliation(s)
- H Endou
- Department of Pharmacology, Faculty of Medicine, University of Tokyo, Japan
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Kijima H, Haga T, Takatsuna M, Ota R, Hakamada K, Fukuda S. [Premalignant lesions of gallbladder]. Nihon Shokakibyo Gakkai Zasshi 2015; 112:437-43. [PMID: 25759218 DOI: 10.11405/nisshoshi.112.437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Hiroshi Kijima
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine
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29
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Suzuki K, Ota R, Tsuya R, Tsushima K, Saitoh S, Sakata Y. Study of the Medical Treatment of Extrahepatic Bile Duct Cancer at Misawa City Hospital. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu436.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Suzuki K, Tsuya R, Ota R, Tsushima K, Saitoh S, Sakata Y. Study of the medical treatment of extrahepatic bile duct cancer at Misawa City Hospital. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e15112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | | | - Rie Ota
- Misawa City Hospital, Misawa, Japan
| | | | - Soh Saitoh
- Department of Medical Oncology, Misawa City Hospital, Misawa, Japan
| | - Yuh Sakata
- CEO, Misawa Municipal Hospital, Misawa, Japan
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31
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Sugimura H, Agnello M, Ahn J, Ajimura S, Akazawa Y, Amano N, Aoki K, Bhang H, Endo M, Evtoukhovitch P, Feliciello A, Fujioka H, Fukuda T, Hasegawa S, Hayakawa S, Honda R, Hosomi K, Hwang S, Ichikawa Y, Igarashi Y, Imai K, Ishibashi N, Iwasaki R, Joo C, Kiuchi R, Lee J, Lee J, Matsuda K, Matsumoto Y, Matsuoka K, Miwa K, Mizoi Y, Moritsu M, Nagae T, Nagamiya S, Nakagawa M, Naruki M, Noumi H, Ota R, Roy B, Saha P, Sakaguchi A, Sako H, Samanta C, Samoilov V, Sasaki Y, Sato S, Sekimoto M, Shimizu Y, Shiozaki T, Shirotori K, Soyama T, Takahashi T, Takahashi T, Tamura H, Tanabe K, Tanaka T, Tanida K, Tokiyasu A, Tsamalaidze Z, Ukai M, Yamamoto T, Yamamoto Y, Yang S, Yoshida K. Study onΛ6H hypernucleus by the (π−,K+) reaction at J-PARC. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146609017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Yamamoto TM, Nakano T, Yamaguchi M, Shimizu M, Wu H, Aoki H, Ota R, Kobayashi T, Sano K. Disinfective process of strongly acidic electrolyzed product of sodium chloride solution against Mycobacteria. Med Mol Morphol 2012; 45:199-205. [PMID: 23224598 DOI: 10.1007/s00795-011-0560-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 07/29/2011] [Indexed: 11/28/2022]
Abstract
Electrolyzed acid water (EAW) has been studied for its disinfective potential against pathogenic microbes; however, the bactericidal process against Mycobacteria has not been clearly presented. In this study, to clarify the disinfective process against Mycobacteria, EAW-treated bacteria were examined against laboratory strains of Mycobacterium bovis (M. bovis), Mycobacterium smegmatis (M. smegmatis), and Mycobacterium terrae (M. terrae) by recovery culture and observation of morphology, enzymatic assay, and the detection of DNA. All experiments were performed with the use of EAW containing 30 ppm free chlorine that kills Mycobacteria, including three pathogenic clinical isolates of Mycobacterium tuberculosis (M. tuberculosis) and six isolates of other Mycobacteria, within 5 min. In morphology, the bacterial surface became rough, and a longitudinal concavity-like structure appeared. The intrabacterial enzyme of EAW-contacted bacteria was inactivated, but chromosomal DNA was not totally denatured. These results suggest that the bactericidal effect of EAW against Mycobacteria occurs by degradation of the cell wall, followed by denaturation of cytoplasmic proteins, but degeneration of the nucleic acid is not always necessary.
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Affiliation(s)
- Tomoyo Matsushita Yamamoto
- Department of Microbiology and Infection Control, Osaka Medical College, 2-7 Daigaku-Machi, Takatsuki, Osaka 569-8686, Japan
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33
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Masuda T, Ota R, Ando T, Maeda N, Horie Y, Yoshimura T, Motomura M, Kawakami A. False-positive accumulation of metaiodobenzylguanidine in a case with acute intermittent porphyria. Intern Med 2011; 50:1029-32. [PMID: 21532227 DOI: 10.2169/internalmedicine.50.5096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We report a 36-year-old woman presenting with hypertensive encephalopathy followed by bulbar palsy and quadriplegia. After an extensive screening for secondary causes of hypertension, the patient was suspected of having pheochromocytoma due to increased levels of catecholamines in the plasma and the urine, and positive (131)I-metaiodobenzylguanidine (MIBG) accumulation in the gallbladder. However, MIBG accumulation was not reproducible without any tumors accompanying this accumulation in the gallbladder. A diagnosis of acute intermittent porphyria was finally confirmed based on the characteristic pictures, increased urinary excretion of porphobilinogen, and identification of a heterozygous missense mutation of R173W in the hydroxymethylbilane synthase gene. This case highlights a pitfall in utilizing MIBG to detect a source of excessive catecholamine and also suggests the importance of having a complete clinical history and extensive work-up of any possible differential diagnosis. We also review the potential mechanism by which false-positive MIBG accumulation occurs.
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Affiliation(s)
- Tomoko Masuda
- The First Department of Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
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35
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Waddell PJ, Kishino H, Ota R. A phylogenetic foundation for comparative mammalian genomics. Genome Inform 2002; 12:141-54. [PMID: 11791233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
A major effort is being undertaken to sequence an array of mammalian genomes. Coincidentally, the evolutionary relationships of the 18 presently recognized orders of placental mammals are only just being resolved. In this work we construct and analyse the largest alignments of amino acid sequence data to date. Our findings allow us to set up a series of superordinal groups (clades) to act as prior hypotheses for further testing. Important findings include strong evidence for a clade of Euarchonta+Glires (=Supraprimates) comprised of primates, flying lemurs, tree shrews, lagomorphs and rodents. In addition, there is good evidence for a clade of all placental mammals except Xenarthra and Afrotheria (=Boreotheria) and for the previously recognised clades Laurasiatheria, Scrotifera, Fereuungulata, Ferae, Afrotheria, Euarchonta, Glires, and Eulipotyphla. Accordingly, a revised classification of the placental mammals is put forward. Using this and molecular divergence-time methods, the ages of the superordinal splits are estimated. While results are strongly consistent with the earliest superordinal divergences all being >65 mybp (Cretaceous period), they suffer from greater uncertainty than presently appreciated. The early primate split of tarsiers from the anthropoid lineage at ~55 mybp is seen to be an especially informative fossil calibration point. A statistical framework for testing clades using SINE data is presented and reveals significant support for the tarsier/anthropoid clade, as well as the clades Cetruminantia and Whippomorpha. Results also underline our thesis that while sequence analysis can help set up hypothesised clades, SINEs obtainable from sequencing 1-2 MB regions of placental genomes are essential to testing them. In contrast, derivations suggest that empirical Bayesian methods for sequence data may not be robust estimators of clades. Our findings, including the study of genes such as TP53, make a good case for the tree shrew as a closer relative of primates than rodents, while also showing a slower rate of evolution in key cell cycle genes. Tree shrews are consequently high value experimental animals and a strong candidate for a genome sequencing initiative.
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Affiliation(s)
- P J Waddell
- Biological Sciences, University of South Carolina, SC 29208, USA.
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36
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Ota R, Waddell PJ, Hasegawa M, Shimodaira H, Kishino H. Appropriate likelihood ratio tests and marginal distributions for evolutionary tree models with constraints on parameters. Mol Biol Evol 2000; 17:798-803. [PMID: 10779540 DOI: 10.1093/oxfordjournals.molbev.a026358] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We show how to make appropriate likelihood ratio tests for evolutionary tree models when parameters such as edge (internodes or branches) lengths have nonnegativity constraints. In such cases, under the null model of an edge length being zero, the marginal distribution of this parameter is proven to be a "half-normal", that is, 50% zero values and 50% the positive half of a normal distribution. Other constrained parameters, such as the proportion of invariant sites, give similar results. To make likelihood ratio tests between nested models, e.g., H(0): homogeneous site rates, and H(1): site rates follow a gamma distribution with variance 1/k, then asymptotically as sequence length increases, the distribution under H(0) becomes a mixture of chi distributions, in this case 50% chi(0), and 50% chi(1) (where the subscript denotes degrees of freedom, i.e. , not the usually assumed 100% chi(1); which leads to a conservative test). Such mixtures are sometimes called distributions. Simulations show that even with sequences as short as 125 sites, some parameters, including the proportion of invariant sites, fit asymptotic distributions closely.
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Affiliation(s)
- R Ota
- The Graduate University for Advanced Studies and The Institute of Statistical Mathematics, 4-6-7 Minami-Azabu, Minato-ku, Tokyo, Japan
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Nishizaki T, Okano S, Uchiyama H, Ikegami T, Hashimoto K, Minagawa R, Ota R, Nomoto K, Yanaga K, Sugimachi K. Intra-operative hyaluronic acid clearance predicts postoperative graft function in living related liver transplantation. Int Surg 1999; 84:262-5. [PMID: 10533789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
Although intra-operative hyaluronic acid (HA) clearance has been reported to be a predictive parameter for early graft function after the implantation of a cadaveric hepatic graft, it has yet to be evaluated as a parameter in assessing graft function in living related liver transplantation. The aim of this study was to evaluate whether intra-operative HA clearance can be a predictive parameter of early graft function in living related liver transplant patients. Eight consecutive patients, who underwent a living related liver transplantation, were entered into the study. The HA clearance 180 min after reperfusion of the graft was evaluated. Significantly higher serum HA levels were found in the patients with fulminant hepatitis than in the patients with non-fulminant hepatitis before operation (P < 0.01), just before reperfusion (P < 0.01), and 180 min after reperfusion (P < 0.05). The HA clearance correlated with the peak total bilirubin within 5 postoperative days (P < 0.05) and the lactic acid one day after operation (P < 0.01). The intra-operative HA clearance serves as a sensitive parameter for assessing the postoperative graft function after the implantation of the new liver. Based on our findings, measuring the HA clearance was thus found to be clinically useful in the assessment of graft function in living related liver transplantation.
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Affiliation(s)
- T Nishizaki
- Department of Surgery II, Kyushu University, Fukuoka, Japan
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Tashiro A, Hongo M, Ota R, Utsumi A, Imai T. Hyper-insulin response in a patient with depression. Changes in insulin resistance during recovery from depression. Diabetes Care 1997; 20:1924-5. [PMID: 9405924 DOI: 10.2337/diacare.20.12.1924] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Abstract
Selenium is essential for both mammalian and avian species, although its metabolism in birds has been less thoroughly studied. Little information has been available on the kinetics of selenium in birds, especially as it relates to the teratogenicity seen in waterfowl consuming excessive amounts. This study describes the pharmacokinetics of small amounts of 75Se as selenious acid injected into female mallard ducks. Labeled selenium was injected into a wing vein of restrained animals and tissues taken at five different time points up to 24 h post-injection. Selenium levels as percent of injected dose were determined in liver, kidney, heart, lung, adrenals, thyroid, spleen, pancreas, ovaries, intestine, muscle and plasma. Estimates of kinetic parameters (uptake and elimination rates, time of maximum concentration and maximum concentration) were obtained with a non-linear kinetics computer program (PCNONLIN, SCI Software, Lexington, KY). Results showed four basic patterns of distribution, uptake and elimination. Visceral tissues exhibited a triphasic pattern with a rapid rise, a decline followed by a distinctive increase in levels between the last two time points. Brain uptake was continuous over the 24 h. Plasma rose rapidly and then declined to a constant level. The ovaries as a tissue of interest relating to the teratogenic effects of selenium showed the greatest relative increase at 24 h, suggesting kinetic mechanisms consistent with a pathway that might lead to accumulation of toxic levels and teratogenic effects during embryo development.
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Affiliation(s)
- D S Wilson
- Department of Nutrition/142, University of Nevada, Reno 89557-0132, USA
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41
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Ota R, Okisaka S. [Effects of anticoagulant therapy on retinal vein occlusion]. Nippon Ganka Gakkai Zasshi 1995; 99:955-8. [PMID: 7676897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The combined effect of prostaglandin E1, stellate ganglion block, warfarin potassium and photocoagulation on 66 cases (eyes) of retinal vein occlusion was investigated immediately after, and 3 months and 6 months after final treatment. The time between onset and treatment was 2 months or less. Macular hemorrhage and edema were observed in all cases. The effectiveness rate 6 months after treatment was 35% in hemorrhagic central retinal vein occlusion and 63% in branch retinal vein occlusion. Visual acuity increased gradually with time from immediately after to 6 months after treatment. The effectiveness of treatment including warfarin potassium was lower than that of treatment without warfarin potassium in branch retinal vein occlusion, and many cases showed a marked decrease of visual acuity which might be related to the prolonged hemorrhage. These results suggest that combining prostaglandin E1, stellate ganglion block and photocoagulation in retinal vein occlusion produces better effects on visual acuity than ordinary treatment or spontaneous regression.
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Affiliation(s)
- R Ota
- Department of Ophthalmology, National Defense Medical College, Saitama-ken, Japan
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Abstract
Forty-one preterm children (29 with spastic diplegia and 12 without motor deficits) who had a normal verbal IQ were studied to clarify the clinical significance of neuroanatomical abnormalities disclosed by T1-weighted and T2-weighted magnetic resonance imaging (MRI). Both types of images clearly showed abnormalities in the frontal corona radiata of the children with spastic diplegia, while there were no abnormalities in the children without motor deficits. We compared the T1-weighted imaging findings with deficits of higher brain functions, evaluated by the performance subtests of the Wechsler Intelligence Scale. Thinning of the parietal and/or occipital white matter was noted in children with visuospatial cognitive deficits. Thus, MRI may be helpful in confirming early clinical suspicions of visuospatial cognitive deficits as well as motor deficits in preterm children, especially those with spastic diplegia.
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Affiliation(s)
- M Goto
- Division of Pediatric Neurology, Chiba Rehabilitation Center, Japan
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43
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Hall MR, Huang JC, Ota R, Redelman D, Hanks D, Taylor RE. Characterization of Tritrichomonas foetus antigens, using bovine antiserum. Am J Vet Res 1986; 47:2549-53. [PMID: 3541705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Tritrichomonas foetus antigens were identified, using the serum of an Angus heifer that had been repeatedly immunized with suspensions of 1 X 10(8) organisms in Freund's complete adjuvant. Antibody activity against T foetus was determined by dot-blot analysis, using horse-radish peroxidase-conjugated anti-bovine immunoglobulin to detect bound antibody. The antiserum contained antibodies against surface and flagellar components of live or fixed T foetus, as determined by use of immunofluorescence. The antiserum reacted with approximately 38 proteins in a pool of 55 to 60 components resolvable by polyacrylamide-gel electrophoresis of T foetus extracts.
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Henry BE, Ota R, Evermann JF. Genetic relatedness of disease-associated field isolates of bovid herpesvirus type 4. Am J Vet Res 1986; 47:2242-6. [PMID: 3022624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Eight field isolates of bovid herpesvirus type 4 (BHV-4) were examined by restriction analysis and Southern blot hybridization with respect to their relatedness to one another and to the BHV-4 prototype strain DN-599. Isolates were obtained from cattle exhibiting a range of disease states including abortion, pneumonia, enteritis, metritis, and vaginal blisters. Initial growth studies of all 9 viruses were performed and revealed that the overall rate of virus growth was slow when compared with that of other herpesviruses. Infection with each virus also resulted in the formation of large fused cells, which in addition to the slow growth rate, indicated that the isolates were of the cytomegalovirus type. Further studies to characterize and compare the various BHV-4 isolates were undertaken by obtaining cell-free virus from infected cell populations. Viral isolates were purified and used as a source of BHV-4 DNA. Purified DNA, representing each of the 8 field isolates and the prototype strain DN-599, were each cleaved with 3 restriction enzymes and were separated by agarose-gel electrophoresis, and the resultant fragment patterns were compared. In general, genomic fragments of the field isolates corresponded to those generated by cleavage of DN-599 DNA, with the exception of the abortion-associated isolate 83-3572. Additional minor differences were also seen between DN-599 DNA and DNA from the other field isolates, but the overall restriction patterns were similar. To confirm that all isolates were members of the BHV-4 type, hybridization studies were performed using DN-599.(ABSTRACT TRUNCATED AT 250 WORDS)
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Yoshiike H, Yotsumoto K, Ueno M, Ota R, Inagaki F. [Coping with mother's anxieties; role of nurses]. Kango Gijutsu 1983; 29:1631-40. [PMID: 6558188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Ota R. [Bedside nursing. Continued nursing of a diabetic patient based on a check list prepared by the hospital nursing staff]. Kangogaku Zasshi 1982; 46:1149-53. [PMID: 6925012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Otomi S, Takana S, Izumi K, Sato T, Ota R. [Proceedings: 3 cases of left ventricular wall perforation by contrast medium injection]. Jpn Circ J 1975; 39:725. [PMID: 1152218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Hiroshige T, Sato T, Ota R, Ito S. Increase of corticotropin-releasing activity in the rat hypothalamus following noxious stimuli. Jpn J Physiol 1969; 19:866-75. [PMID: 5309126 DOI: 10.2170/jjphysiol.19.866] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Ota R. [In vitro comparative study of the effect of daily and intermittent administration of various secondary antituberculor agents]. Bull Chest Dis Res Inst Kyoto Univ 1969; 2:198-207 passim. [PMID: 4980644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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50
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Sakakibara S, Konno S, Nakajima K, Endo M, Ota R. [Anomalous systemic venous drainage]. Kyobu Geka 1969; 22:104-11. [PMID: 5814519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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