The Experts below are selected from a list of 3324 Experts worldwide ranked by ideXlab platform
Hisao Ito - One of the best experts on this subject based on the ideXlab platform.
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identification of Warthin Tumor magnetic resonance imaging versus salivary scintigraphy with technetium 99m pertechnetate
Journal of Computer Assisted Tomography, 2005Co-Authors: Ken Motoori, Takuya Ueda, Yoshitaka Uchida, Hideaki Chazono, Homare Suzuki, Hisao ItoAbstract:OBJECTIVE: The aim of this study was to evaluate the accuracy of technetium-99m (Tc-99m) pertechnetate scintigraphy and magnetic resonance (MR) imaging in the diagnosis of Warthin Tumor. METHODS: Sixteen cases of Warthin Tumor and 17 cases of non-Warthin Tumor were examined by Tc-99m pertechnetate scintigraphy with lemon juice stimulation and MR imaging, including T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic images. We used the receiver operating characteristic (ROC) curve to evaluate diagnostic accuracy. RESULTS: The mean area under the ROC curves of MR imaging in the diagnosis of Warthin Tumor (0.97) was higher than that of Tc-99m pertechnetate scintigraphy (0.88). CONCLUSION: Magnetic resonance imaging is more useful in the evaluation of Warthin Tumor than Tc-99m pertechnetate scintigraphy.
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Warthin Tumor of the parotid gland diagnostic value of mr imaging with histopathologic correlation
American Journal of Neuroradiology, 2004Co-Authors: Mitsuaki Ikeda, Ken Motoori, Takuya Ueda, Toyoyuki Hanazawa, Yuichiro Nagai, Seiji Yamamoto, Hiroyuki Funatsu, Hisao ItoAbstract:BACKGROUND AND PURPOSE: The purpose of our study was to describe the MR imaging appearance of Warthin Tumors multiple MR imaging techniques and to interpret the difference in appearance from that of malignant parotid Tumors. METHODS: T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic MR images of 19 Warthin Tumors and 17 malignant parotid Tumors were reviewed. MR imaging results were compared with those of pathologic analysis. RESULTS: Epithelial stromata and lymphoid tissue with slitlike small cysts in Warthin Tumors showed early enhancement and a high washout rate (≥30%) on dynamic contrast-enhanced images, and accumulations of complicated cysts showed early enhancement and a low washout ratio ( min ) of Warthin Tumor on short tau inversion recovery (0.29 ± 0.22 SD) ( P P −3 mm 2 /s) was significantly lower ( P −3 mm 2 /s). CONCLUSION: Detecting hypointense areas of short tau inversion recovery and T2-weighted images or low apparent diffusion coefficient values on diffusion-weighted images was useful for predicting whether salivary gland Tumors were Warthin Tumors. The findings of the dynamic contrast-enhanced study also were useful.
Gregory Ravizzini - One of the best experts on this subject based on the ideXlab platform.
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incidental 18f fluciclovine uptake in a Warthin Tumor of the parotid gland in a patient undergoing pet ct imaging for biochemical recurrent prostate cancer
Clinical Nuclear Medicine, 2020Co-Authors: Ryan Bitar, Lucia Martiniova, Diana Bell, Gregory RavizziniAbstract:A 67-year-old asymptomatic man with biochemical recurrent prostate cancer underwent F-fluciclovine PET/CT for restaging to determine subsequent treatment strategy. PET/CT images were obtained from the proximal thighs to the vertex of the skull, after the intravenous administration of 362.6 MBq (9.8 mCi) of F-fluciclovine. PET/CT imaging demonstrated a focus of abnormally increased F-fluciclovine uptake corresponding to a small nodularity in the left parotid gland. Subsequent ultrasound-guided fine-needle aspiration biopsy of the lesion revealed histopathology compatible with a benign Warthin Tumor.
Shrikant Chaudhari - One of the best experts on this subject based on the ideXlab platform.
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Incidental Warthin Tumor on Pertechnetate Scintigraphy.
Clinical Nuclear Medicine, 2016Co-Authors: Mukta Kulkarni, Shubhangi Shetkar, Prathamesh Joshi, Sanket Kasaliwal, Shrikant ChaudhariAbstract:A 30-year-old woman underwent Tc-pertechnetate scintigraphy for evaluation of thyrotoxicosis. The scintigraphy revealed hypervascular thyroid gland with markedly increased trapping function in both the lobes suggesting diagnosis of Graves disease. Incidentally, a hypervascular and pertechnetate avid focus was seen along the lateral margin of the right parotid gland. Pertechnetate avidity and site of uptake suggested possibility of Warthin Tumor. Clinical examination and ultrasonography revealed a well-defined lesion in the superficial lobe of the right parotid gland favoring diagnosis of benign lesion. Postsurgery specimen confirmed diagnosis of Warthin Tumor.
Ken Motoori - One of the best experts on this subject based on the ideXlab platform.
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identification of Warthin Tumor magnetic resonance imaging versus salivary scintigraphy with technetium 99m pertechnetate
Journal of Computer Assisted Tomography, 2005Co-Authors: Ken Motoori, Takuya Ueda, Yoshitaka Uchida, Hideaki Chazono, Homare Suzuki, Hisao ItoAbstract:OBJECTIVE: The aim of this study was to evaluate the accuracy of technetium-99m (Tc-99m) pertechnetate scintigraphy and magnetic resonance (MR) imaging in the diagnosis of Warthin Tumor. METHODS: Sixteen cases of Warthin Tumor and 17 cases of non-Warthin Tumor were examined by Tc-99m pertechnetate scintigraphy with lemon juice stimulation and MR imaging, including T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic images. We used the receiver operating characteristic (ROC) curve to evaluate diagnostic accuracy. RESULTS: The mean area under the ROC curves of MR imaging in the diagnosis of Warthin Tumor (0.97) was higher than that of Tc-99m pertechnetate scintigraphy (0.88). CONCLUSION: Magnetic resonance imaging is more useful in the evaluation of Warthin Tumor than Tc-99m pertechnetate scintigraphy.
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Warthin Tumor of the parotid gland diagnostic value of mr imaging with histopathologic correlation
American Journal of Neuroradiology, 2004Co-Authors: Mitsuaki Ikeda, Ken Motoori, Takuya Ueda, Toyoyuki Hanazawa, Yuichiro Nagai, Seiji Yamamoto, Hiroyuki Funatsu, Hisao ItoAbstract:BACKGROUND AND PURPOSE: The purpose of our study was to describe the MR imaging appearance of Warthin Tumors multiple MR imaging techniques and to interpret the difference in appearance from that of malignant parotid Tumors. METHODS: T1-weighted, T2-weighted, short inversion time inversion recovery, diffusion-weighted, and contrast-enhanced dynamic MR images of 19 Warthin Tumors and 17 malignant parotid Tumors were reviewed. MR imaging results were compared with those of pathologic analysis. RESULTS: Epithelial stromata and lymphoid tissue with slitlike small cysts in Warthin Tumors showed early enhancement and a high washout rate (≥30%) on dynamic contrast-enhanced images, and accumulations of complicated cysts showed early enhancement and a low washout ratio ( min ) of Warthin Tumor on short tau inversion recovery (0.29 ± 0.22 SD) ( P P −3 mm 2 /s) was significantly lower ( P −3 mm 2 /s). CONCLUSION: Detecting hypointense areas of short tau inversion recovery and T2-weighted images or low apparent diffusion coefficient values on diffusion-weighted images was useful for predicting whether salivary gland Tumors were Warthin Tumors. The findings of the dynamic contrast-enhanced study also were useful.
Yasushi Naito - One of the best experts on this subject based on the ideXlab platform.
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preoperative diagnostic strategy for parotid gland Tumors using diffusion weighted mri and technetium 99m pertechnetate scintigraphy a prospective study
PLOS ONE, 2016Co-Authors: Masahiro Kikuchi, Sho Koyasu, Shogo Shinohara, Yukihiro Imai, Megumu Hino, Yasushi NaitoAbstract:Objective Fine needle aspiration cytology (FNAC) for diagnosis of a parotid gland Tumor is widely used but its sensitivity is low and non-diagnostic rate is relatively high. In contrast, core needle biopsy (CNB) has a higher sensitivity and lower rate of sampling errors but has a higher risk of injury to adjacent organs such as facial nerve than FNAC. Screening of patients with parotid gland Tumors to identify cases of pleomorphic adenoma (PA) and Warthin Tumor (WT) may allow CNB to be confined to patients without PA and WT. We established an algorithm for preoperative diagnosis and management of parotid gland Tumor using diffusion-weighted MRI and 99mTc pertechnetate scintigraphy. This algorithm was developed with the goal of maximal reduction of the number of patients in whom CNB is required. The purpose of the study is to validate our algorithm prospectively.
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Scatter plots of ADCmean for each histopathological category.
2016Co-Authors: Masahiro Kikuchi, Sho Koyasu, Shogo Shinohara, Yukihiro Imai, Megumu Hino, Yasushi NaitoAbstract:The ADC ranges for pleomorphic adenoma, Warthin Tumor, other benign Tumors, carcinoma, and malignant lymphoma were 1.07 to 2.11 (median: 1.60) × 10−3, 0.78 to 1.27 (0.87) × 10−3, 0.62 to 1.51 (0.93) × 10−3, 0.97 to 1.98 (1.13) × 10−3, and 0.61 to 0.69 (0.69) × 10−3 mm2/sec, respectively.
