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Clinical Nuclear Medicine

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https://www.readbyqxmd.com/read/28418955/late-124i-pet-ct-uptake-measurement-assessment-of-appropriate-examination-protocol-in-benign-thyroid-diseases
#1
Martin Freesmeyer, Anja S Gabler, Christian Kühnel, Thomas Winkens
PURPOSE: This study aimed at investigating the performance of late I PET/CT for radioiodine uptake (RAIU) measurement at 336 hours after administration in patients with benign thyroid diseases requiring radioiodine therapy. Special attention was paid to the comparability of I uptake (I-RAIU) to the clinical standard (I-RAIU, probe measurement). Considering cost aspects, we sought to establish an economically reasonable examination protocol based on scan duration and administered activity...
April 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28418954/aortic-root-abscess-clearly-shown-on-111in-leukocyte-scan-but-less-obvious-on-transesophageal-echocardiogram
#2
Harleen Kaur, John Seitz, Mitchel Muhleman, David Cragg, Feng Qing
A 79-year-old man with history of aortic stenosis, status post bioprosthetic aortic valve replacement, episodes of bacteremia, and endocarditis presented to hospital with fever. Clinical assessment led to suspicion of possible endocarditis. Initial interpretation of transesophageal echocardiogram was inconclusive without vegetation in mitral/aortic valve. An In-leukocyte scan demonstrated increased uptake in the area of aortic valve, suggestive of infection. Further review of the transesophageal echocardiogram showed signs of annular abscess...
April 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28418953/pulmonary-perfusion-scan-mimicking-hepatobiliary-scintigraphy-in-a-patient-with-an-uncommon-manifestation-of-granulomatosis-with-polyangiitis
#3
Michelle D Hopstone, Evan A Raff, Patrick M Colletti
A 36-year-old man with known granulomatosis with polyangiitis underwent quantitative ventilation-perfusion pulmonary scintigraphy as part of an initial evaluation for lung transplant candidacy. Radiotracer uptake on the perfusion study has the appearance of the hepatic silhouette, drawing initial concern that there may have been a misadministration of Tc with a hepatobiliary agent. Comparison CT reveals extensive cystic bronchiectasis, parenchymal destruction, and volume loss involving the entire left lung and basal portions of the right lung, with the residual portions of functional lung parenchyma conforming to a shape similar to the liver...
April 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28418952/fdg-pet-ct-findings-of-nodular-sclerosis-subtype-classic-hodgkin-lymphoma-presented-as-mediastinal-nodal-lesions-at-onset-but-as-predominant-osseous-disease-at-relapse
#4
Kun Zheng, Hongming Zhuang
Nodular sclerosis-subtype classic Hodgkin lymphoma in general manifests as bulky mediastinal lymphadenopathy but very rarely involves bones. We report FDG PET/CT findings of a 19-year-old man with pathology-proven, nodular sclerosis-type classic Hodgkin lymphoma. His initial FDG PET/CT scan at the diagnosis showed only hypermetabolic lymphadenopathy in the mediastinum. However, the FDG PET/CT acquired when the disease recurred 20 months later showed predominant osseous disease without additional nodal lesions outside the mediastinum...
April 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28418951/putaminal-hypometabolism-exceeding-caudate-abnormalities-on-18f-fdg-pet-in-huntington-disease
#5
Tarun Singhal, Chun K Kim
An F-FDG PET scan performed on a patient suspected of having early Huntington disease (HD) showed marked hypometabolism in bilateral putamen that was significantly worse than the hypometabolism in caudate. While HD could not be completely excluded, the scan finding was felt to be somewhat atypical for HD because of a lesser degree of caudate involvement. Genetic testing eventually confirmed the diagnosis of HD. This case shows that diagnosis of HD should still be considered even when putaminal hypometabolism exceeds caudate changes on F-FDG PET imaging...
April 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28418950/sacral-fatigue-fracture-in-a-military-recruit
#6
Matthew D Burgess, Mickaila J Johnston, Eugene D Silverman
A 19-year-old male military recruit presented with 3 weeks of persistent left hip and groin pain after abnormally twisting his hip during a hike. Initial radiographs were interpreted as negative. He subsequently underwent a bone scan which revealed linear left sacral uptake along or paralleling the sacroiliac joint. Differential diagnostic considerations included unilateral sacroiliitis and sacral fracture. SPECT/CT was performed which confirmed left sacral fatigue stress fracture. Transitional lumbosacral anatomy was evident on radiographs with pseudoarticulation of the transitional left S1 transverse process with the sacrum...
April 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28418949/initial-experience-with-simultaneous-18f-fdg-pet-mri-in-the-evaluation-of-cardiac-sarcoidosis-and-myocarditis
#7
Kate Hanneman, Michael Kadoch, Henry H Guo, Mehran Jamali, Andrew Quon, Andrei Iagaru, Robert Herfkens
PURPOSE: The purpose of this study was to compare combined PET/MRI with PET/CT and cardiac MRI in the evaluation of cardiac sarcoidosis and myocarditis. METHODS: Ten patients (4 men and 6 women; 56.1 ± 9.6 years old) were prospectively enrolled for evaluation of suspected cardiac sarcoidosis or myocarditis. Written informed consent was obtained. Following administration of 9.9 ± 0.9 mCi F-FDG, patients underwent standard cardiac PET/CT followed by combined PET/MRI using a simultaneous 3-T scanner...
April 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28394842/struma-ovarii-with-hyperthyroidism
#8
Lynn P Ang, Anca M Avram, Richard W Lieberman, Nazanene H Esfandiari
We report the case of a 61-year-old woman with persistent thyrotoxicosis for 7 years despite low thyroidal radioiodine uptake and methimazole treatment. Her initial I whole-body scan (WBS) was read as negative. Upon evaluation in our institution, she remained hyperthyroid after discontinuation of methimazole. Repeat WBS with SPECT/CT revealed low 24-hour thyroidal uptake (RAIU = 2%) and intensely focal radioiodine uptake in a large heterogeneous left pelvic mass, consistent with left adnexal struma ovarii. Resection of this mass confirmed benign struma ovarii...
April 7, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28394841/blastic-plasmacytoid-dendritic-cell-neoplasm-evaluated-by-fdg-pet-ct
#9
Zu-Gui Li, Hai-Yu Mu
Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is a rare and aggressive hematological malignancy. A 34-year-old man with a biopsy-proven BPDCN underwent FDG PET/CT for staging. FDG PET/CT revealed multiple mild FDG-avid cutaneous lesions on the chest and back, involvement of left inguinal lymph node, and a markedly increased FDG-avid subcutaneous mass in the left lower leg.
April 7, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28394840/quality-and-safety-in-health-care-part-xxvii-research-and-future-directions-of-the-adult-cardiac-surgery-database
#10
Jay A Harolds
This article discusses some of the most recent research and future directions of the Adult Cardiac Surgery Database of the Society of Thoracic Surgeons. In addition to numerous articles on short-term outcomes from cardiac surgery on adults, there are new initiatives of the Adult Cardiac Surgery Database which will allow long-term outcome analysis and better estimation for each patient on the likely value of the procedure to that individual.
April 7, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28394839/quality-and-safety-in-health-care-part-xxvi-the-adult-cardiac-surgery-database
#11
Jay A Harolds
The Adult Cardiac Surgery Database of the Society of Thoracic Surgeons has provided highly useful information in quality and safety in general thoracic surgery, including ratings of the surgeons and institutions participating in this type of surgery. The Adult Cardiac Surgery Database information is very helpful for writing guidelines and determining optimal protocols and for many research projects. This article discusses the history and current status of this database.
April 7, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28394838/an-alternate-egg-free-radiolabeled-meal-formulation-for-gastric-emptying-scintigraphy
#12
Philippe Garrigue, Aurore Bodin-Hullin, Sandra Gonzalez, Quentin Sala, Benjamin Guillet
Tc-radiolabeled scrambled eggs (SEs) are most often used as the ingested solid phase for gastric-emptying scintigraphy, leading egg-reluctant patients to avoid the examination. We formulated and validated 2 egg-free alternate meals, in the absence of any commercialized formulation: chocolate mug cake (MC) and scrambled tofu (ST). Six healthy volunteers underwent gastric-emptying scintigraphy after ingesting Tc-radiolabeled MC, ST, or SE. Gastric retention indexes did not change significantly between formulations (% of overtime variation to SE: MC 7...
April 7, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28394837/18f-fluorocholine-18f-fdg-and-18f-fluoroethyl-tyrosine-pet-ct-in-parathyroid-cancer
#13
Margit Hatzl, Julia C Röper-Kelmayr, Franz A Fellner, Michael Gabriel
We report on a 71-year-old woman presenting with biochemical features indicating recurrent disease in long-term follow-up of left-sided parathyroid carcinoma. She had undergone several surgical procedures including total thyroidectomy, partial resection of the esophageal wall, and curative neck radiation 12 years previously. PET/CT using F-fluorocholine revealed high uptake in local relapse in the lower neck, comparable to F-FDG, whereas only faint uptake was observed with F-fluoroethyl tyrosine. As shown in this case, imaging with FDG and F-fluorocholine is feasible in (recurrent) parathyroid carcinoma and clearly superior to F-fluoroethyl tyrosine...
April 7, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28394836/18f-fdg-pet-ct-of-tuberculosis-meningitis-and-carotid-pseudoaneurysm
#14
Kasturi Rangan, Mudalsha Ravina, Nitin Yadav, Ajay Singh Suraj, Sanjay Gambhir
A 26-year-old woman presented with a headache, left-sided weakness of the body, and pulsatile swelling above the sternal notch. She was treated for abdominal tuberculosis in the past, two years later she developed miliary tuberculosis and was put on modified regimen of antitubercular drugs in view of drug induced hepatitis. Ultrasound neck revealed saccular aneurysm measuring 4 x 3 cm, located in between common carotid arteries with an eccentric thrombus. MRI brain revealed multiple tuberculoma with thick basal meningeal enhancement...
April 7, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28368895/multicentric-reticulohistiocytosis-mimicking-malignancy-on-18f-fdg-pet-ct
#15
Masatoshi Hotta, Ryogo Minamimoto, Daisuke Suzuki, Atsuko Takahashi
We report the case of a 75-year-old woman who underwent F-FDG PET/CT to evaluate the recurrence of urothelial carcinoma. PET/CT showed F-FDG-avid muscles and lymph nodes, mimicking recurrence. However, F-FDG uptake was also seen in multiple joints and subcutaneous tissue, representing an uncommon finding for recurrence. Further history taking revealed she had been pathologically diagnosed with multicentric reticulohistiocytosis (MRH) from skin biopsy, and the F-FDG PET/CT findings were consistent with MRH, a rare systemic inflammatory granulomatous disease of unknown etiology...
March 31, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28368894/herniated-thoracic-spleen-mimicking-lung-metastasis-on-68ga-labeled-prostate-specific-membrane-antigen-pet-ct-in-a-patient-with-prostate-cancer
#16
Dharmender Malik, Rajender K Basher, Apurva Sood, Sudheer Kumar Devana, Anish Bhattacharya, Bhagwant Rai Mittal
We report a case of clinically asymptomatic patient of prostate cancer who was previously subjected to radical prostatectomy presenting with a rising serum prostate-specific antigen level of 6.6 ng/mL. Whole-body PET/CT with Ga-labeled prostate-specific membrane antigen ligand was performed to assess for disease recurrence, which revealed an intense tracer uptake in a soft tissue mass in left hemithorax mimicking lung metastasis; which later turned out to be splenic tissue.
March 31, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28368893/early-detection-of-bilateral-testicular-metastases-from-prostatic-adenocarcinoma-using-68ga-psma-ligand-pet-ct
#17
Desiree Weiberg, Herbert Radner, Thorsten Derlin, Walter F Thon
We present the case of a 76-year-old man with biochemical relapse after primary therapy for prostate cancer. Ga prostate-specific membrane antigen (PSMA) ligand PET/CT performed for localization of recurrent disease revealed bilateral metastases to the testes. Histopathologic evaluation after bilateral orchiectomy revealed testicular metastases. Metastases to the testes are rare and usually seen in advanced stages. Ga-PSMA ligand PET/CT is a highly sensitive and specific imaging method for the detection of primary and metastatic prostate cancer and has refined diagnostic approaches...
March 31, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28368892/unilaterally-decreased-striatal-dopamine-transporter-caused-by-venous-anomaly
#18
Lode Goethals, Sophie Bourgeois, Yannick De Brucker, Hendrik Everaert, Frank W De Geeter
We describe a finding of unilaterally decreased binding of I-ioflupane in the basal ganglia in a 78-year-old woman that could be attributed to an underlying developmental venous anomaly.
March 31, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28368891/adult-b-cell-acute-lymphoblastic-leukemia-dominated-by-osteolytic-bone-involvement-on-ct-but-less-impressive-pet-on-fdg-pet-ct-images
#19
Sijuan Zou, Yanxia Shen, Dongling Zhu, Donghua Zhang, Xiaohua Zhu
A 47-year-old man presented with abdominal pain, vomiting, and bone pain. Laboratory findings revealed severe hypercalcemia, anemia, and renal insufficiency with decreased serum parathyroid hormone. FDG PET/CT was performed for characteristics suggestive of multiple myeloma and other occult malignancy. The images revealed widespread osteolytic lesions with only 1 focus of definite abnormal FDG uptake. B-cell acute lymphoblastic leukemia was confirmed by pathological examination following bone marrow biopsy.
March 31, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28368890/68ga-dotatoc-pet-ct-imaging-in-solitary-fibrous-tumor-of-the-pleura
#20
Filippo Lococo, Cristian Rapicetta, Massimiliano Casali, Salvatore Bellafiore, Giulio Rossi, Giorgio Treglia, Elisa Gasparini, Massimiliano Paci
Here we describe a 77-year-old man with a solitary fibrous tumor of the pleura showing increasing tracer uptake at Ga-DOTATOC PET/CT, demonstrating that solitary fibrous tumor of the pleura may overexpress somatostatin receptors, therefore mimicking neuroendocrine tumors at somatostatin receptor PET/CT.
March 31, 2017: Clinical Nuclear Medicine
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