scholarly journals Motor Speech Apraxia in a 70-Year-Old Man with Left Dorsolateral Frontal Arachnoid Cyst: A [18F]FDG PET-CT Study

2016 ◽  
Vol 2016 ◽  
pp. 1-3
Author(s):  
Nicolaas I. Bohnen ◽  
Jacob Haugen ◽  
Karen Kluin ◽  
Vikas Kotagal
Keyword(s):  
Arachnoid Cyst ◽  
Brain Structures ◽  
Motor Speech ◽  
Left Frontal Lobe ◽  
Neurodegenerative Process ◽  
Positron Emission ◽  
Pet Ct ◽  
History Of ◽  
Magnetic Resonance Imaging Mri ◽  
Fdg Pet Ct

Motor speech apraxia is a speech disorder of impaired syllable sequencing which, when seen with advancing age, is suggestive of a neurodegenerative process affecting cortical structures in the left frontal lobe. Arachnoid cysts can be associated with neurologic symptoms due to compression of underlying brain structures though indications for surgical intervention are unclear. We present the case of a 70-year-old man who presented with a two-year history of speech changes along with decreased initiation and talkativeness, shorter utterances, and dysnomia. [18F]Fluorodeoxyglucose (FDG) Positron Emission and Computed Tomography (PET-CT) and magnetic resonance imaging (MRI) showed very focal left frontal cortical hypometabolism immediately adjacent to an arachnoid cyst but no specific evidence of a neurodegenerative process.

scholarly journals Primary Hepatic Choriocarcinoma in a Male Patient: A Case Report and Literature Review

2021 ◽  
Author(s):  
Ke Zhao ◽  
Ke Rao ◽  
Xin Chen ◽  
Si Chen ◽  
Haifeng Xu
Keyword(s):  
Male Patient ◽  
Malignant Tumor ◽  
Poor Prognosis ◽  
Clinical Manifestations ◽  
Deep Understanding ◽  
Positron Emission ◽  
Pet Ct ◽  
Magnetic Resonance Imaging Mri ◽  
The Right ◽  
Fdg Pet Ct

Abstract BackgroundChoriocarcinoma is a rare malignant tumor and rarely occurs outside the gonads. Primary hepatic choriocarcinoma is more infrequent, with hidden clinical manifestations, rapid progress, and extremely poor prognosis. Only more than 10 cases were publicly reported in the world. Therefore, there is still a lack of deep understanding of the diagnosis and treatment of the disease.Case presentationWe report a case of primary hepatic choriocarcinoma in a man diagnosed by pathology. A 65-year-old male patient presented with fever and anorexia, nothing but mild jaundice of the skin and sclera was found on physical examination. Abdominal enhanced magnetic resonance imaging (MRI) showed a huge mass in the right hepatic lobe. Fludeoxyglucose-positron emission tomography-computed tomography (FDG-PET/CT) scan showed increased uptake in the liver and sigmoid colon and no uptake in the testes. The patient underwent the right hepatectomy, and postoperative pathology showed that the tumor was primary hepatic choriocarcinoma. Then he received one course of adjuvant chemotherapy. Then he developed severe myelosuppression and was transferred to the intensive care unit for further treatment. He eventually died of severe liver failure about 100 days after surgery. Primary hepatic choriocarcinoma is extremely rare, and its diagnosis is challenging.ConclusionsPrimary hepatic choriocarcinoma is a rare and highly malignant tumor with a poor prognosis. We believe that this differential diagnosis should be considered in liver tumor patients. The effective treatment for this disease is still to be explored.

scholarly journals Suture Granuloma With False-Positive Findings on FDG-PET/CT Resected via Laparoscopic Surgery

2015 ◽  
Vol 100 (4) ◽  
pp. 604-607 ◽  
Author(s):  
Nobuyoshi Takeshita ◽  
Takayuki Tohma ◽  
Hideaki Miyauchi ◽  
Kazufumi Suzuki ◽  
Takanori Nishimori ◽  
...  
Keyword(s):  
Small Intestine ◽  
Laparoscopic Resection ◽  
History Of Surgery ◽  
Total Hysterectomy ◽  
Positron Emission ◽  
Pelvic Tumors ◽  
Pet Ct ◽  
History Of ◽  
Small Focus ◽  
Fdg Pet Ct

A 61-year-old woman who had undergone total hysterectomy 16 years previously exhibited a pelvic tumor on computed tomography (CT). F-18 fluorodeoxyglucose (FDG) combined positron emission tomography (PET)/CT imaging revealed a solitary small focus of increased FDG activity in the pelvis. A gastrointestinal stromal tumor originating in the small intestine or another type of tumor originating in the mesentery (desmoid, schwannoma, or foreign body granuloma) was suspected; therefore, laparoscopic resection was conducted. A white, hard tumor was found to originate from the mesentery of the sigmoid colon and adhered slightly to the small intestine. The tumor was resected with a negative margin, and the pathologic diagnosis was suture granuloma. The possibility of suture granuloma should be kept in mind in cases of tumors with positive PET findings and a history of surgery close to the lesion. However, it is difficult to preoperatively diagnose pelvic tumors using a biopsy. Therefore, considering the possibility of malignancy, it is necessary to achieve complete resection without exposing the tumor.

scholarly journals Imaging Metabolically Active Fat: A Literature Review and Mechanistic Insights

2019 ◽  
Vol 20 (21) ◽  
pp. 5509
Author(s):  
Joseph Frankl ◽  
Amber Sherwood ◽  
Deborah J. Clegg ◽  
Philipp E. Scherer ◽  
Orhan K. Öz
Keyword(s):  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Cancer Surveillance ◽  
Mitochondrial Uncoupling ◽  
Positron Emission ◽  
Brown Adipose ◽  
Pet Ct ◽  
Brown Adipose Tissue Activity ◽  
Magnetic Resonance Imaging Mri ◽  
Fdg Pet Ct

Currently, obesity is one of the leading causes death in the world. Shortly before 2000, researchers began describing metabolically active adipose tissue on cancer-surveillance 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) in adult humans. This tissue generates heat through mitochondrial uncoupling and functions similar to classical brown and beige adipose tissue in mice. Despite extensive research, human brown/beige fat’s role in resistance to obesity in humans has not yet been fully delineated. FDG uptake is the de facto gold standard imaging technique when studying brown adipose tissue, although it has not been rigorously compared to other techniques. We, therefore, present a concise review of established and emerging methods to image brown adipose tissue activity in humans. Reviewed modalities include anatomic imaging with CT and magnetic resonance imaging (MRI); molecular imaging with FDG, fatty acids, and acetate; and emerging techniques. FDG-PET/CT is the most commonly used modality because of its widespread use in cancer imaging, but there are mechanistic reasons to believe other radiotracers may be more sensitive and accurate at detecting brown adipose tissue activity. Radiation-free modalities may help the longitudinal study of brown adipose tissue activity in the future.

scholarly journals Inflammation, Atherosclerosis, and Coronary Artery Disease: PET/CT for the Evaluation of Atherosclerosis and Inflammation

2014 ◽  
Vol 8s3 ◽  
pp. CMC.S17063 ◽  
Author(s):  
Nadia Alie ◽  
Mootaz Eldib ◽  
Zahi A. Fayad ◽  
Venkatesh Mani
Keyword(s):  
Arterial Walls ◽  
Major Cardiovascular Events ◽  
Positron Emission ◽  
Increased Risk ◽  
Pet Ct ◽  
Potential Benefits ◽  
Artery Disease ◽  
Magnetic Resonance Imaging Mri ◽  
Fdg Pet Ct ◽  
Preclinical And Clinical Studies

Atherosclerosis is a prevalent cardiovascular disease marked by inflammation and the formation of plaque within arterial walls. As the disease progresses, there is an increased risk of major cardiovascular events. Owing to the nature of atherosclerosis, it is imperative to develop methods to further understand the physiological implications and progression of the disease. The combination of positron emission tomography (PET)/computed tomography (CT) has proven to be promising for the evaluation of atherosclerotic plaques and inflammation within the vessel walls. The utilization of the radiopharmaceutical tracer, 18F-fluorodeoxyglucose (18F-FDG), with PET/CT is invaluable in understanding the pathophysiological state involved in atherosclerosis. In this review, we will discuss the use of 18F-FDG-PET/CT imaging for the evaluation of atherosclerosis and inflammation both in preclinical and clinical studies. The potential of more specific novel tracers will be discussed. Finally, we will touch on the potential benefits of using the newly introduced combined PET/magnetic resonance imaging (MRI) for non-invasive imaging of atherosclerosis.

scholarly journals Aktuelle Empfehlungen zur Diagnostik der Riesenzellarteriitis

2019 ◽  
Vol 144 (09) ◽  
pp. 587-594
Author(s):  
Thorsten Bley ◽  
Michael Zänker ◽  
Claudia Dechant ◽  
Nils Venhoff
Keyword(s):  
Temporal Artery ◽  
Duplex Sonography ◽  
Temporal Artery Biopsy ◽  
Positron Emission ◽  
Pet Ct ◽  
Inflammatory Processes ◽  
Magnetic Resonance Imaging Mri ◽  
Fdg Pet Ct ◽  
Color Coded Duplex Sonography ◽  
Inflammation Parameters

AbstractIn Giant Cell Arteritis (GCA), a timely diagnosis is required to avoid severe complications such as blindness or structural vascular damage. The heterogeneous symptoms are mainly due to local and systemic inflammatory processes. Diagnostics are based on increased inflammation parameters in the laboratory, imaging, in which color-coded duplex sonography (FKDS), high-resolution magnetic resonance imaging (MRI), computer tomography (CT) or CT angiography (CTA) and 18F fluorodeoxyglucose-positron emission tomography with CT (FDG-PET-CT) have become established, as well as histopathological findings in temporal artery biopsy.

scholarly journals Painful ophthalmoplegia in a patient with a history of marginal zone lymphoma

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
C. Van Bogaert ◽  
C. Mathey ◽  
I. Vierasu ◽  
N. Trotta ◽  
L. Rocq ◽  
...  
Keyword(s):  
Marginal Zone ◽  
Marginal Zone Lymphoma ◽  
Emission Tomography ◽  
Igg4 Related Disease ◽  
Positron Emission ◽  
Pet Ct ◽  
History Of ◽  
Fdg Pet Ct ◽  
Fluorine 18 Fluorodeoxyglucose ◽  
Made In

AbstractA 73-year-old man with a history of marginal zone lymphoma was admitted to the emergency room for diplopia and ipsilateral headache. The Fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) demonstrated intense and symmetrical hypermetabolism of the cavernous sinuses, and hypermetabolic lesions diffusely in the lymph nodes and bones. The diagnosis of high-grade relapse of lymphomatous disease was made. In this context, the homogenous and symmetric lesion of the cavernous sinuses, without any other encephalic or meningeal lesions, raised the hypothesis of a paraneoplastic origin. A plausible paraneoplastic link between the neuro-ophthalmological lesion and the malignant disorder is IgG4-related disease, a condition that may be associated with lymphoma. As in our case, this diagnosis is often presumptive because histopathological confirmation is difficult to obtain.

scholarly journals A case of Takayasu’s arteritis presented with fever of unknown origin: Diagnostic value of 18f-FDG PET/CT imaging

2021 ◽  
Vol 38 (2) ◽  
pp. 208-210
Author(s):  
Sibel Uçak SEMIRGIN ◽  
Oktay YAPICI
Keyword(s):  
Fever Of Unknown Origin ◽  
Takayasu’S Arteritis ◽  
Unknown Origin ◽  
Diagnostic Value ◽  
Ct Imaging ◽  
Takayasu's Arteritis ◽  
Positron Emission ◽  
Pet Ct ◽  
History Of ◽  
Fdg Pet Ct

Takayasu’s arteritis is a chronic vasculitis of the large vessels and has a rare initial presentation of fever of unknown origin (FUO), renders the condition difficult to diagnose. Fluorodeoxyglucose (FDG) positron-emission tomography-computed tomography (PET-CT) can assist in the early diagnosis of Takayasu’s Arteritis patients with FUO and can improve the prognosis of such patients. In this case report, we describe a 27-year- old female presented with one-month history of FUO, showing heterogeneous increased FDG accumulation along the walls of ascending and arch of aorta, left subclavian artery and right brachiocephalic truncus at PET-CT imaging.

scholarly journals Severe Fever with Thrombocytopenia Syndrome with Necrotizing Lymphadenitis in a Patient who Underwent 18F-FDG PET/CT: A Case Report

2021 ◽  
Vol 18 (19) ◽  
pp. 10488
Author(s):  
A Reum Kim ◽  
Taehwa Kim ◽  
Dong-Hoon Shin ◽  
Sujin Lee ◽  
Seungjin Lim
Keyword(s):  
Emission Tomography ◽  
Asian Countries ◽  
Primary Malignancy ◽  
Positron Emission ◽  
Pet Ct ◽  
History Of ◽  
Necrotizing Lymphadenitis ◽  
Generalized Lymphadenopathy ◽  
Fdg Pet Ct ◽  
Severe Fever

Severe fever with thrombocytopenia syndrome (SFTS), also known as fever, thrombocytopenia, and leukopenia syndrome, is an emerging tick-borne infectious disease in Asian countries. SFTS should be suspected in patients presenting with fever, thrombocytopenia, and leukopenia and have a history of tick exposure in an endemic area. Since SFTS can be accompanied by lymphadenopathy, particularly generalized lymphadenopathy, it can be confused with a primary malignancy, such as lymphoma. The study reports a case of SFTS accompanied by multiple lymphadenopathies, which mimicked malignant lymphoma on F-18 fluorodeoxyglucose positron emission tomography/computed tomography.

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