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https://www.readbyqxmd.com/read/28649084/malignancy-rate-of-focal-thyroid-incidentaloma-detected-by-fdg-pet-ct-results-of-a-prospective-cohort-study
#1
Philippe Thuillier, Nathalie Roudaut, Genevieve Crouzeix, Marie Cavarec, Philippe Robin, Ronan Abgral, Veronique Kerlan, Pierre-Yves Salaun
OBJECTIVE: To evaluate the malignancy rate of focal thyroid incidentaloma (fTI) in a population of patients undergoing a 18F-fluorodeoxyglucose positron emission tomography - computed tomography (FDG PET-CT) for a non-thyroid purpose. DESIGN: We conducted a prospective cohort study from January 2013 to November 2014. All consecutive patients referred for a FDG PET-CT were prospectively screened. Patients with known neoplasic thyroid disease were excluded from the analysis...
June 25, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28646462/diagnostic-utility-of-pet-ct-with-18-f-dopa-and-18-f-fdg-in-persistent-or-recurrent-medullary-thyroid-carcinoma-the-importance-of-calcitonin-and-carcinoembryonic-antigen-cutoff
#2
Ana Reyes Romero-Lluch, Juan Ignacio Cuenca-Cuenca, Raquel Guerrero-Vázquez, Antonio Jesús Martínez-Ortega, Juan Luis Tirado-Hospital, Isabel Borrego-Dorado, Elena Navarro-González
PURPOSE: This study sought to evaluate and compare the utility of 18-F-fluorodihydroxyphenylalanine ((18)F-DOPA) and 18-F-fluorodeoxyglucose ((18)F-FDG) positron emission tomography/computed tomography (PET/CT) for identification of lesions in patients with recurrent medullary thyroid carcinoma (MTC). In addition, we analyzed the correlation between the calcitonin (Ct), carcinoembryonic antigen (CEA) levels, each doubling time (DT), and PET positivity. We evaluated the reliability of the 150 pg/mL Ct cutoff set by the American Thyroid Association guidelines for further imaging (including (18)F-DOPA PET/CT)...
June 23, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28639955/endotracheal-leiomyoma-mimicking-malignancy-on-18f-fdg-pet-ct-in-a-patient-with-papillary-thyroid-carcinoma
#3
Jae Pil Hwang, Seung-Won Lee, Jeong Ja Kwak, Jung Mi Park
Endotracheal leiomyoma is a rare benign lesion, accounting for approximately 1% of tracheal tumors, and generally occurs in the lower respiratory tract. Because its growth causes airway obstruction symptom, surgical treatment is generally suggested after detection. We report a case with leiomyoma of the cervical endotracheal space showing intense FDG uptake on F-FDG PET/CT mimicking malignancy in a 79-year-old woman with papillary thyroid carcinoma.
June 20, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28638977/spect-ct-and-pet-ct-molecular-imaging-in-medullary-thyroid-carcinoma-are-we-running-in-the-right-direction
#4
EDITORIAL
Anna Margherita Maffione, Francesco Giammarile, Domenico Rubello
No abstract text is available yet for this article.
June 22, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28625410/sialadenoma-papilliferum-in-the-buccal-mucosa-detected-on-18-f-fluorodeoxyglucose-positron-emission-tomography
#5
S Miyamoto, T Ogawa, D Chikazu
An incidental discovery of an accumulation of (18)F-fluorodeoxyglucose (FDG) in the oral cavity of patients with malignant tumours on FDG positron emission tomography (PET) can pose a problem regarding the differential diagnosis of metastatic lesions. Large accumulations can often be found even when tumours in the salivary or thyroid gland are benign, so FDG-PET is limited in its ability to differentiate between benign and malignant disease. This report describes a rare case of sialadenoma papilliferum in the buccal mucosa that was discovered incidentally on FDG-PET in a patient with multiple metastases to bone after an operation for rectal cancer...
June 15, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28614009/the-combined-use-of-calcitonin-doubling-time-and-18-f-fdg-pet-ct-improves-prognostic-values-in-medullary-thyroid-carcinoma-the-clinical-utility-of-18-f-fdg-pet-ct
#6
Ji H Yang, Cléber P Camacho, Susan C Lindsey, Flavia O F Valente, Danielle M Andreoni, Lilian Y Yamaga, Jairo Wagner, Rosa Paula M Biscolla, Rui M B Maciel
OBJECTIVE: Calcitonin and carcinoembryonic antigen (CEA) doubling times are established prognostic markers in medullary thyroid cancer (MTC). On the other hand, positron emission tomography with fluorine-18 fluorodeoxyglucose ((18)F-FDG PET/CT) shows an increased rate of detection with high blood tumor marker levels in several cancers. This study aims to analyze the ability of (18)F-FDG PET/CT to determine prognosis in the followup of patients with MTC. METHODS: Medical records of 17 patients with MTC who underwent (18)F-FDG PET/CT were analyzed retrospectively...
June 14, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28614007/ectopic-cushing-s-syndrome-a-ten-year-experience-from-a-tertiary-care-centre-in-southern-india
#7
Samantha Sathyakumar, Thomas Vizhalil Paul, Hesargatta Shyamsunder Asha, Birla Roy Gnanamuthu, M J Paul, Deepak Thomas Abraham, Simon Rajaratnam, Nihal Thomas
OBJECTIVE: Ectopic ACTH secretion is a less common cause of Cushing's syndrome, and is seen in 5 to 10% of cases with endogenous hypercortisolemia. We hereby describe our experience of patients with ectopic ACTH syndrome, who have been managed over the past 10 years at a tertiary care centre in Southern India. METHODS: The inpatient and outpatient records of patients from 2006 to 2015 were retrospectively reviewed. The clinical features, clinical history, biochemical values, imaging features which included radiological findings and PET scans, management, details of follow-up and outcomes were documented...
June 14, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28600666/papillary-thyroid-carcinoma-metastasizing-to-anaplastic-meningioma-an-unusual-case-of-tumor-to-tumor-metastasis
#8
Sumit Das, Navjot Chaudhary, Lee-Cyn Ang, Joseph S Megyesi
Tumor-to-tumor metastasis is a relatively uncommon entity, whereby the so-called 'recipient' tumor is involved by another biologically unrelated 'donor' tumor. Intracranially, meningioma (WHO grade 1) is the most common recipient tumor, while breast and lung cancers are the most common donor tumors. We present an unusual case of intracranial tumor-to-tumor metastasis involving papillary thyroid carcinoma (PTC) believed to have metastasized to an anaplastic meningioma (WHO grade 3). The patient is a 64-year-old female with a history of PTC, whose neuroimaging, performed as part of her staging workup, revealed a right parietal scalp lesion...
June 9, 2017: Brain Tumor Pathology
https://www.readbyqxmd.com/read/28588814/coincidence-of-follicular-lymphoma-and-hurtle-cell-thyroid-carcinoma-in-a-patient-at-presentation-which-one-is-the-source-of-bone-metastasis-case-report-and-review-of-the-literature
#9
Hasan Atilla Ozkan, Arda Akoluk, Turhan Ozler, Isin Dogan Ekici, Nalan Alan Selcuk
Thyroid incidentaloma is defined as a new identified thyroid lesion occasionally detected during imaging studies. Incidence of thyroid incidentalomas is relatively rare in patients with lymphoma. Because of high rate of malignancy, these lesions with high intensity focal (18) FDG uptake detected on positron emission tomography with computed tomography (PET/CT) should undergo to biopsy regardless of size.
June 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28588229/diagnostic-performance-of-18-f-fdg-pet-ct-in-papillary-thyroid-carcinoma-with-negative-131-i-wbs-at-first-postablation-negative-tg-and-progressively-increased-tgab-level
#10
Zhong-Ling Qiu, Wei-Jun Wei, Chen-Tian Shen, Hong-Jun Song, Xin-Yun Zhang, Zhen-Kui Sun, Quan-Yong Luo
Differentiated thyroid cancer (DTC) patients with negative serum thyroglobulin (Tg), negative (131)I whole-body scintigraphy ((131)I-WBS) at first post-ablation and progressively increased TgAb level are a relatively rare entity in the follow-up after total thyroidectomy and radioactive iodine therapy. The value of (18)F-FDG PET/CT in detecting the recurrence of disease in these patients has only been reported in a small case series. The goal of this study was to investigate the diagnostic accuracy of (18)F-FDG PET/CT in detecting recurrent disease in these specific PTC patients and to identify risk factors for patients with positive (18)F-FDG PET/CT results...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28585147/optimal-threshold-of-stimulated-serum-thyroglobulin-level-for-18-f-fdg-pet-ct-imaging-in-patients-with-thyroid-cancer
#11
Hong Chai, Hu Zhang, Yong-Li Yu, Yun-Chao Gao
This study was to explore the optimal threshold of thyroid-stimulating hormone (TSH)-stimulated serum thyroglobulin (s-Tg) for patients who were to receive (18)F-fluorodeoxyglucose ((18)F-FDG) PET/CT scan owing to clinical suspicion of differentiated thyroid cancer (DTC) recurrence but negative post-therapeutic (131)I whole-body scan ((131)I-WBS). A total of 60 qualified patients underwent PET/CT scanning from October 2010 to July 2014. The receiver operating characteristic (ROC) curve analyses showed that s-Tg levels over 49 μg/L led to the highest diagnostic accuracy of PET/CT to detect recurrence, with a sensitivity of 89...
June 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28572488/detection-of-synchronous-primary-malignancies-with-68-ga-psma-pet-ct-in-patients-with-prostate-cancer-frequency-in-764-patients
#12
Medhat M Osman, Amir Iravani, Michael S Hofman, Rodney J Hicks
We evaluated the incidence of synchronous primary malignancies in patients being evaluated by (68)Ga-PSMA PET/CT for prostate cancer (PC). Methods: Reports for 764 PC patients were reviewed. Incidental lesions atypical for PC metastases and suggestive of a synchronous primary malignancy were identified. Follow-up was obtained to confirm etiology. Results: Lesions atypical for PC metastases were found in 49 of 764 (6.4%) patients with a confirmed synchronous primary in 5 (0.7%) patients (2 lung, 1 lymphoma, thyroid, and base of tongue)...
June 1, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28564739/-histologic-remission-following-neoadjuvant-immunotherapy-in-a-patient-with-lynch-syndrome-and-primarily-unresectable-relapse-of-rectum-carcinoma
#13
Anita Micheel, Felix Aigner, Oliver Henke
Clinical History A 43-year-old male patient was diagnosed to have rectum carcinoma cT4N2M0 with underlying Lynch-Syndrome. After initializing neoadjuvant radio-chemotherapy followed by operation, the patient presents with an extensive locoregional relapse within a short time. In order to achieve resectability, a second line treatment with FOLFOXIRI protocol in addition to Bevacizumab was conducted. However, after completing six cycles of this intensiv treatment protocol, the tumour showed further progression...
June 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28562377/the-value-of-18f-dopa-pet-ct-in-patients-with-medullary-thyroid-carcinoma-and-increased-calcitonin-values
#14
Anja T Golubić, Eva Pasini Nemir, Marijan Žuvić, Andrea Mutvar, Sanja Kusačić Kuna, Marija Despot, Tatjana Samardžić, Dražen Huić
AIM: The aim of this prospective observational study was to examine the benefit of a fluorine-18-L-dihydroxyphenylalanine (F-DOPA) PET/computed tomography (CT) scan in patients with medullary thyroid carcinoma (MTC) in terms of increased calcitonin levels. PATIENTS AND METHODS: Twenty-eight MTC patients after initial total thyreoidectomy with increasing follow-up calcitonin levels suggestive for active disease after negative conventional imaging findings (neck ultrasound or thorax, abdomen, pelvis multislice computed tomography as standard imaging) were scanned using F-DOPA PET/CT from November 2012 to April 2016...
May 30, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28559934/the-current-status-of-spect-or-spect-ct-in-south-korea
#15
REVIEW
Ikdong Yoo, Eun Kyoung Choi, Yong-An Chung
The first step to nuclear medicine in Korea started with introduction of the gamma camera in 1969. Although planar images with the gamma camera give important functional information, they have the limitations that result from 2-dimensional images. Single-photon emission computed tomography (SPECT) due to its 3-dimensional image acquisition is superior to earlier planar gamma imaging in image resolution and diagnostic accuracy. As demand for a hybrid functional and anatomical imaging device has increased, integrated SPECT/CT systems have been used...
June 2017: Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28533654/psma-expression-in-multinodular-thyroid-neoplasm-on-simultaneous-ga-68-psma-pet-mri
#16
Amarnath Jena, Shuaib Zaidi, Vikas Kashyap, Abhishek Jha, Sangeeta Taneja
PSMA PET is increasingly being used in imaging of recurrent prostate carcinoma. A case with suspected recurrent Prostate carcinoma (PCa), raised PSA (Prostate specific antigen) and suspected spinal metastases was referred for whole body Ga-68-PSMA PET/MRI. The study revealed PSMA avid recurrent prostate mass and extensive osseous metastases. Abnormal PSMA uptake in the thyroid gland prompted USG-guided FNAC which revealed Hurthle cell neoplasm. Histopathological examination (HPE) of excised gland showed multiple Hurthle cell adenomas in both lobes of thyroid along with foci of papillary thyroid carcinoma which on immunohistochemistry were thyroglobulin positive and PSA negative...
April 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28525461/18f-fdg-pet-ct-of-papillary-carcinoma-in-a-lateral-thyroglossal-duct-cyst
#17
Christos Sachpekidis, Matthias S Dettmer, Sabine Weidner, Roland Giger, Jan Wartenberg
A 69-year-old man presented with bulging of the right oropharyngeal wall, which revealed cytopathologically malignant cells. The man underwent MRI and F-FDG PET/CT, which demonstrated a cystic parapharyngeal lesion with an F-FDG-avid soft tissue component and right cervical lymph node. The patient was operated on and showed thyroid cancer in normal thyroid tissue, compatible with a papillary thyroid carcinoma in a lateral thyroglossal duct cyst and 2 ipsilateral lymph node metastases. Despite its rarity, papillary thyroid carcinoma in a thyroglossal duct cyst should be kept as one of the differential diagnoses in patients presenting with parapharyngeal cystic lesion...
May 19, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28523582/first-in-human-radiation-dosimetry-of-68-ga-nodaga-rgdyk
#18
Silvano Gnesin, Periklis Mitsakis, Francesco Cicone, Emmanuel Deshayes, Vincent Dunet, Augusto F Gallino, Marek Kosinski, Sébastien Baechler, Franz Buchegger, David Viertl, John O Prior
BACKGROUND: Integrin-targeting radiopharmaceuticals have potential broad applications, spanning from cancer theranostics to cardiovascular diseases. We have previously reported preclinical dosimetry results of (68)Ga-NODAGA-RGDyK in mice. This study presents the first human dosimetry of (68)Ga-NODAGA-RGDyK in the five consecutive patients included in a clinical imaging protocol of carotid atherosclerotic plaques. Five male patients underwent whole-body time-of-flight (TOF) PET/CT scans 10, 60 and 120 min after tracer injection (200 MBq)...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28523180/primary-atypical-carcinoid-tumor-of-the-mediastinum-a-very-rare-finding
#19
Luigi Ventura, Letizia Gnetti, Enrico Maria Silini, Guido Rindi, Paolo Carbognani, Michele Rusca, Luca Ampollini
Primary neuroendocrine tumors (NETs) of the mediastinum are very rare. Prognosis is usually poor despite treatment options. We present the case of a primary atypical carcinoid tumor of the mediastinum successfully treated by multimodal approach. A 50-year-old man presented for asthenia, dyspnea, and substernal sense of weight for two weeks. A chest-CT scan revealed a tumor mass of 107×55×95 mm(3) localized in the anterosuperior mediastinum compressing both brachiocephalic veins, the superior vena cava, the pericardium, and lungs...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28522155/fibroelastic-pseudotumour-elastofibroma-dorsi-detected-by-18-f-fdg-pet-ct-and-by-posttherapy-radioiodine-spect-ct
#20
M Oporto, F Cepa, N Orta, S Rubí, H Navalón, C Peña
Radioiodine uptake in the thyroid tissue, metastasis of differentiated thyroid cancer (DTC), and in other tissues, depends on the expression of sodium-iodide symporter (NIS). Vascular permeability, effusions, inflammation, and other mechanisms may also play a role in the accumulation of radioactive iodine. A 63-year-old woman underwent radioiodine therapy, as well as a post-therapy whole-body scan,as she was suspected of having lung metastasis from thyroid carcinoma. The scan not only showed uptake at the lung metastasis but also a faint diffuse bilateral uptake in the posterior thorax...
May 15, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
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