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Liu X, Yan S, Qin X, Cheng K, Zheng J, Wu H, Wei Y, Yuan S. Increased 18F-FAPI uptake in bones and joints of lung cancer patients: characteristics and distributions. Skeletal Radiol 2023; 52:2377-2386. [PMID: 37129613 DOI: 10.1007/s00256-023-04335-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/30/2023] [Accepted: 04/01/2023] [Indexed: 05/03/2023]
Abstract
OBJECTIVE This study investigated the distribution and characteristics of various bone and joint lesions on 18F-FAPI PET/CT in lung cancer patients. METHODS Seventy-four lung cancer patients who underwent 18F-FAPI PET/CT were reviewed. Bone and joint lesions with elevated 18F-FAPI uptake were recorded and analyzed. The distribution and maximum uptake value (SUVmax) of different benign lesions or bone metastases were presented. In addition, the SUVmax of bone metastases on 18F-FDG and 18F-FAPI-04 PET/CT were also compared. RESULTS In 53 patients, a total of 262 lesions presented 18F-FAPI accumulation. Bone metastases were mainly in vertebrae, pelvis, and ribs, while benign lesions were in vertebral margins, alveolar bone, and shoulder joints. The SUVmax of bone metastases was significantly higher than that of benign lesions ([Formula: see text] vs. [Formula: see text], [Formula: see text]), with NSCLC cases having higher SUVmax values than SCLC cases ([Formula: see text] vs. [Formula: see text], [Formula: see text]). Among benign lesions, arthritis and periodontitis demonstrated higher SUVmax than degenerative lesions (arthritis: [Formula: see text]; periodontitis: [Formula: see text]; degenerative diseases: [Formula: see text]; [Formula: see text] and [Formula: see text], respectively). The SUVmax of bone metastases was comparable between 18F-FDG and 18F-FAPI PET/CT. However, 18F-FAPI PET/CT was found to be superior in identifying cranial metastases compared to 18F-FDG PET/CT (TBRmet/brain: [Formula: see text] vs. [Formula: see text], [Formula: see text]). CONCLUSION This study demonstrated that 18F-FAPI PET/CT is a valuable imaging modality for detecting bone and joint lesions in lung cancer patients. The SUVmax of malignant lesions was higher than that of benign lesions, but cannot accurately distinguish benign and malignant lesions. The uptake of FAPI differs among lesions with different pathological types.
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Affiliation(s)
- Xiaoli Liu
- Department of Radiotherapy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
- Department of Radiotherapy, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Shoumei Yan
- Department of Nuclear Medicine, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Xueting Qin
- Department of Radiotherapy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Kai Cheng
- Department of Nuclear Medicine, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Jinsong Zheng
- Department of Nuclear Medicine, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Hongbo Wu
- Department of Nuclear Medicine, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Yuchun Wei
- Department of Radiotherapy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China.
| | - Shuanghu Yuan
- Department of Radiotherapy, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China.
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Purohit K, Minassian G, Purohit L, Peyster R, Bluestone A. Increased Vertebral Gallium-68-DOTATATE Activity on Positron Emission Tomography-Computed Tomography in Merkel Cell Carcinoma: Not Always Metastasis. Cureus 2023; 15:e39427. [PMID: 37362502 PMCID: PMC10288818 DOI: 10.7759/cureus.39427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2023] [Indexed: 06/28/2023] Open
Abstract
Merkel cell carcinoma (MCC) is a rare neuroendocrine dermal malignancy seen in elderly light-skinned individuals, associated with immunosuppression and Merkel cell polyomavirus infection. As a neuroendocrine tumor, the recurrence and metastasis of MCC can be evaluated using positron emission tomography-computed tomography (PET-CT) with the Gallium-68-DOTATATE (Ga-68-DOTATATE) radiotracer, which has demonstrated increased sensitivity to neuroendocrine metastases when compared to F-18 fluorodeoxyglucose (FDG). Here, we present the case of a patient with known metastatic MCC with a new, abnormal focus of increased radiotracer activity in the thoracic spine on Ga-68-DOTATATE PET-CT suspected to represent a metastatic lesion. Further evaluation with MRI revealed a benign vertebral hemangioma, highlighting the limitations of this radiotracer in the setting of benign spinal lesions. Multimodality imaging findings of metastatic MCC and potential pitfalls of Ga-68-DOTATATE PET-CT staging are discussed.
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Affiliation(s)
- Kush Purohit
- Radiology, Stony Brook University Hospital, Stony Brook, USA
| | - Greg Minassian
- Radiology, Stony Brook University Hospital, Stony Brook, USA
| | - Luv Purohit
- Internal Medicine, Broward Health Medical Center, Fort Lauderdale, USA
| | - Robert Peyster
- Radiology, Stony Brook University Hospital, Stony Brook, USA
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Wang P, Li T, Cui Y, Zhuang H, Li F, Tong A, Jing H. 18 F-MFBG PET/CT Is an Effective Alternative of 68 Ga-DOTATATE PET/CT in the Evaluation of Metastatic Pheochromocytoma and Paraganglioma. Clin Nucl Med 2023; 48:43-48. [PMID: 36252940 DOI: 10.1097/rlu.0000000000004447] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE The current guidelines state that the functional imaging choice in the evaluation of metastatic pheochromocytoma and paraganglioma (PPGL) is 68 Ga-DOTATATE PET/CT. 18 F-meta-fluorobenzylguanidine ( 18 F-MFBG) is a new PET tracer and an analog of meta-iodobenzylguanidine (MIBG). This study aimed to compare 18 F-MFBG and 68 Ga-DOTATATE PET/CT in patients with metastatic PPGL. PATIENTS AND METHODS Twenty-eight patients with known metastatic PPGL were prospectively recruited for this study. All patients underwent both 18 F-MFBG and 68 Ga-DOTATATE PET/CT studies within 1 week. Lesion numbers detected were compared between these 2 studies. RESULTS 18 F-MFBG PET/CT was positive for detecting metastases in all patients, whereas positive results of 68 Ga-DOTATATE PET/CT were in 27 (96.4%) patients. A total of 686 foci of metastatic lesions were detected by both 18 F-MFBG and 68 Ga-DOTATATE imaging. In addition, 33 foci of abnormal activity were only detected by 18 F-MFBG, whereas 16 foci were only shown on 68 Ga-DOTATATE PET/CT. CONCLUSIONS Our data suggest that 18 F-MFBG PET/CT is an effective imaging method in the evaluation of metastatic PPGL and could be alternative of 68 Ga-DOTATATE PET/CT in this clinical setting.
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Affiliation(s)
- Peipei Wang
- From the Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine
| | - Tuo Li
- From the Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine
| | - Yuying Cui
- Department of Endocrinology and Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hongming Zhuang
- Department of Radiology, Children's Hospital of Philadelphia University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Fang Li
- From the Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine
| | - Anli Tong
- Department of Endocrinology and Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hongli Jing
- From the Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine
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Azzouzi H, Ichchou L. Schmorl's nodes: demystification road of endplate defects-a critical review. Spine Deform 2022; 10:489-499. [PMID: 34825353 DOI: 10.1007/s43390-021-00445-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 11/11/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Schmorl's nodes (SN) were the first vertebral endplate defects described. Debate continues about their epidemiology, physiopathology, and clinical significance. The purpose of this work was to summarize and discuss available literature about SN. METHODS We have searched for relevant papers about SN until April 2020, with 104 articles have been reviewed. RESULTS More than half of the available literature described the epidemiological aspects of SN or reported rare clinical presentations and treatment options. The lack of a consensual definition of SN, among other endplate defects, contributed to difficulties in literature results' interpretation. Summing up, SN is a frequent vertebral defect at the thoracolumbar juncture, with ethnic and gender influence. Lumbar Schmorl's nodes were frequently associated with disc degenerative disease and back pain. Their physiopathology remains unknown. However, strain energy changes in the spine along with morphological aspects of the vertebra, the genetic background, and the osteoimmunology may constitute possible clues. New SN could be confused in malignancy context with bone metastasis. The literature describes some imaging techniques to differentiate them, avoiding invasive approaches. Treatment options for rare painful presentations remain few with low evidence. Further studies are needed to establish a consensual definition for SN, understand clinical aspects, and provide adequate therapeutic strategies.
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Affiliation(s)
- Hamida Azzouzi
- Department of Rheumatology, Faculty of Medicine, Mohammed VI University Hospital of Oujda, Université Mohammed Premier, Oujda, Morocco.
| | - Linda Ichchou
- Department of Rheumatology, Faculty of Medicine, Mohammed VI University Hospital of Oujda, Université Mohammed Premier, Oujda, Morocco
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Long T, Hou J, Yang N, Zhou M, Li Y, Li J, Tang Y, Chen D, Hu S. Utility of 18F-AlF-NOTA-Octreotide PET/CT in the Localization of Tumor-Induced Osteomalacia. J Clin Endocrinol Metab 2021; 106:e4202-e4209. [PMID: 33864458 DOI: 10.1210/clinem/dgab258] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Indexed: 11/19/2022]
Abstract
CONTEXT Tumor-induced osteomalacia (TIO) is a paraneoplastic disorder, usually caused by benign mesenchymal tumors that produce high levels of fibroblast growth factor 23. The only curative therapy is resection of the causative tumors. OBJECTIVE This research was conducted to evaluate the efficacy of 18F-AlF-NOTA-octreotide (18F-OC) positron emission tomography/computed tomography (PET/CT) in detecting TIO and its impact on patient management. METHODS Retrospective analysis was conducted of 17 patients with hypophosphatemic osteomalacia suspected to be TIO. A 18F-OC PET/CT study was performed in all 17 patients to localize the tumor and 68Ga-DOTATATE PET/CT was performed in 4 out of 17 patients; both studies were performed within 1 week of each other. Both studies were interpreted blindly without the knowledge of other imaging findings. The image findings were compared with the results of histopathological examinations and clinical follow-ups. RESULTS The 18F-OC PET/CT scans were positive in 14 patients. Furthermore, 4 of 14 patients were scanned with both 18F-OC and 68Ga-DOTATATE PET/CT. Both studies were able to localize the tumor in all 4 patients. In total, 14 patients had surgery to remove the lesions. Postsurgical pathological examination confirmed causative tumors in these patients, whose symptoms diminished promptly. Serum phosphate levels normalized, confirming the diagnosis of TIO. 18F-OC PET/CT sensitivity, specificity, and accuracy were 87.5%, 100%, and 88.2% respectively. 18F-OC PET/CT findings affected patient management in 88.2% of cases. CONCLUSION 18F-OC PET/CT scan is useful in the detection of tumors causing TIO. Further studies with larger patient populations are needed to validate the result.
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Affiliation(s)
- Tingting Long
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jiale Hou
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Nengan Yang
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Ming Zhou
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Yulai Li
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jian Li
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Yongxiang Tang
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Dengming Chen
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Shuo Hu
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
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Current status and future prospects of PET-imaging applications in patients with gastro-entero-pancreatic neuroendocrine tumors (GEP-NETs). Eur J Radiol 2021; 143:109932. [PMID: 34482177 DOI: 10.1016/j.ejrad.2021.109932] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 08/17/2021] [Accepted: 08/21/2021] [Indexed: 12/23/2022]
Abstract
Gastro-entero-pancreatic neuroendocrine tumors (GEP-NETs) represent a heterogeneous group of rare neoplasms with increasing incidence over the last decades. Localization of GEP-NETs and their metastases is a vital component for the implementation of accurate and patient-tailored treatment strategies. Addressing this challenge requires the employment of multidisciplinary imaging approaches, with hybrid positron emission tomography/computed tomography (PET/CT) imaging techniques standing at the forefront of this effort. GEP-NETs exhibit several pathophysiologic characteristics, which can serve as highly specific molecular targets that can be effectively visualized and quantified by means of PET-radiopharmaceuticals, facilitating diagnosis, accurate staging and efficient monitoring of treatment response. Furthermore, the capability for whole-body, in-vivo, non-invasive characterization of the molecular heterogeneity of the disease, provides strong prognostic information, while enabling the selection of patients suitable for precision-based theranostic approaches. The dual tracer (18F-FDG & 68Ga-DOTA-peptides) PET/CT imaging approach is the current optimal diagnostic imaging strategy, since it enables tumor localization, accurate staging, non-invasive whole-body total tumor burden characterization of disease heterogeneity, while providing strong prognostic information and guidance towards treatment strategy. Moreover, 64Cu-DOTATATE has been recently approved by FDA for SSTRs positive NETs, promising substantial diagnostic and logistical benefits. Furthermore, 18F-DOPA offers diagnostic capabilities for serotonin-secreting GEP-NETs which are not characterized by cell-surface over-expression of somatostatin receptors (SSTRs) and cannot be seen on morphological imaging. In addition, PET/CT with agents targeting the expression of glucagon-like peptide-1 receptor (GLP-R1) should be considered in cases of clinical suspicion for insulinomas that cannot be detected by morphological imaging or STTRs PET/CT imaging.
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Z Papadakis G, Kochiadakis G, Lazopoulos G, Marias K, Klapsinos N, Hannah-Shmouni F, G Igoumenaki G, Konstantinos Nikolouzakis T, Kteniadakis S, A Spandidos D, H Karantanas A. Targeting vulnerable atherosclerotic plaque via PET-tracers aiming at cell-surface overexpression of somatostatin receptors. Biomed Rep 2020; 13:9. [PMID: 32765848 PMCID: PMC7391298 DOI: 10.3892/br.2020.1316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 06/15/2020] [Indexed: 01/13/2023] Open
Abstract
Cardiovascular disease (CD) is the leading cause of death in the developed world, with major atherothrombotic events, being mainly attributed to the rupture of unstable, vulnerable atherosclerotic lesions, leading to blood flow obstruction. Since unstable atherosclerotic plaques frequently do not cause hemodynamically significant blood flow restriction, conventional stress imaging tests cannot depict the vulnerable, high-risk for rupture atherosclerotic lesions. Therefore, molecular imaging techniques targeting specific pathophysiologic features related to atherosclerotic plaque rupture mechanism, hold promise for precise and individualized treatment strategies of CD. In the current report, we describe in a patient diagnosed with pancreatic neuroendocrine tumor, the selective uptake of 68Ga-DOATATE by an atherosclerotic lesion in the thoracic aorta. This data indicates that 68Ga-DOTATATE, which is a positron emitting tomography tracer, targeting the recruitment of macrophages taking place in the vulnerable plaque, could potentially serve as an imaging probe for the detection of high-risk, prone to rupture plaques.
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Affiliation(s)
- Georgios Z Papadakis
- Department of Radiology, Medical School, University of Crete, 71003 Heraklion, Greece.,Foundation for Research and Technology Hellas (FORTH), Computational Biomedicine Laboratory (CBML), 70013 Heraklion, Greece
| | | | - George Lazopoulos
- Department of Cardiothoracic Surgery, University General Hospital of Heraklion, University of Crete, Medical School, 71003 Heraklion, Greece
| | - Kostas Marias
- Foundation for Research and Technology Hellas (FORTH), Computational Biomedicine Laboratory (CBML), 70013 Heraklion, Greece
| | - Nikolaos Klapsinos
- Foundation for Research and Technology Hellas (FORTH), Computational Biomedicine Laboratory (CBML), 70013 Heraklion, Greece
| | - Fady Hannah-Shmouni
- Internal Medicine-Endocrinology, Hypertension and Metabolic Genetics, Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - Georgia G Igoumenaki
- Foundation for Research and Technology Hellas (FORTH), Computational Biomedicine Laboratory (CBML), 70013 Heraklion, Greece
| | | | | | - Demetrios A Spandidos
- Laboratory of Clinical Virology, Medical School, University of Crete, 70013 Heraklion, Greece
| | - Apostolos H Karantanas
- Department of Radiology, Medical School, University of Crete, 71003 Heraklion, Greece.,Foundation for Research and Technology Hellas (FORTH), Computational Biomedicine Laboratory (CBML), 70013 Heraklion, Greece
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Kalemaki MS, Karantanas AH, Exarchos D, Detorakis ET, Zoras O, Marias K, Millo C, Bagci U, Pallikaris I, Stratis A, Karatzanis I, Perisinakis K, Koutentakis P, Kontadakis GA, Spandidos DA, Tsatsakis A, Papadakis GZ. PET/CT and PET/MRI in ophthalmic oncology (Review). Int J Oncol 2020; 56:417-429. [PMID: 31939615 PMCID: PMC6959466 DOI: 10.3892/ijo.2020.4955] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 12/31/2019] [Indexed: 12/16/2022] Open
Abstract
Orbital and ocular anatomy is quite complex, consisting of several tissues, which can give rise to both benign and malignant tumors, while several primary neoplasms can metastasize to the orbital and ocular space. Early detection, accurate staging and re-staging, efficient monitoring of treatment response, non-invasive differentiation between benign and malignant lesions, and accurate planning of external radiation treatment, are of utmost importance for the optimal and individualized management of ophthalmic oncology patients. Addressing these challenges requires the employment of several diagnostic imaging techniques, such as high-definition digital fundus photography, ultrasound imaging, optical coherence tomography, optical coherence tomography (OCT)-angiography, computed tomography (CT) and magnetic resonance imaging (MRI). In recent years, technological advances have enabled the development of hybrid positron emission tomography (PET)/CT and PET/MRI systems, setting new standards in cancer diagnosis and treatment. The capability of simultaneously targeting several cancer-related biochemical procedures using positron emitting-radiopharmaceuticals, while morphologically characterizing lesions by CT or MRI, together with the intrinsic quantitative capabilities of PET-imaging, provide incremental diagnostic information, enabling accurate, highly efficient and personalized treatment strategies. Aim of the current review is to discuss the current applications of hybrid PET/CT and PET/MRI imaging in the management of patients presenting with the most commonly encountered orbital and ocular tumors.
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Affiliation(s)
- Maria S Kalemaki
- Department of Ophthalmology, Venizeleio General Hospital of Heraklion, 71409 Heraklion, Greece
| | | | - Dimitris Exarchos
- Department of CT‑MRI and PET/CT, Evangelismos Hospital, 10676 Athens, Greece
| | - Efstathios T Detorakis
- Department of Ophthalmology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Odysseas Zoras
- Department of Surgical Oncology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Kostas Marias
- Foundation for Research and Technology Hellas (FORTH), Computational Biomedicine Laboratory (CBML), 70013 Heraklion, Greece
| | - Corina Millo
- Positron Emission Tomography Department, Clinical Center (CC), National Institutes of Health (NIH), Bethesda, MD 20814, USA
| | - Ulas Bagci
- Center for Research in Computer Vision (CRCV), University of Central Florida (UCF), Orlando, FL 32816, USA
| | - Ioannis Pallikaris
- Department of Ophthalmology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Andreas Stratis
- Foundation for Research and Technology Hellas (FORTH), Computational Biomedicine Laboratory (CBML), 70013 Heraklion, Greece
| | - Ioannis Karatzanis
- Foundation for Research and Technology Hellas (FORTH), Computational Biomedicine Laboratory (CBML), 70013 Heraklion, Greece
| | - Kostas Perisinakis
- Department of Medical Physics, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Pavlos Koutentakis
- Department of Ophthalmology, Venizeleio General Hospital of Heraklion, 71409 Heraklion, Greece
| | - Georgios A Kontadakis
- Department of Ophthalmology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Demetrios A Spandidos
- Laboratory of Clinical Virology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Aristidis Tsatsakis
- Laboratory of Forensic Sciences and Toxicology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Georgios Z Papadakis
- Department of Radiology, Medical School, University of Crete, 71003 Heraklion, Greece
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Increased Activity Due to Fractures Does Not Significantly Affect the Accuracy of 68Ga-DOTATATE PET/CT in the Detection of Culprit Tumor in the Evaluation of Tumor-Induced Osteomalacia. Clin Nucl Med 2018; 43:880-886. [PMID: 30273206 DOI: 10.1097/rlu.0000000000002290] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Ga-DOTATATE PET/CT is currently the most common imaging modality in localizing culprit tumors, which can result in tumor-induced osteomalacia (TIO). Fracture, which is one of the most common consequences of the TIO, can also lead to increased Ga-DOTATATE activity and potentially affect the accuracy of Ga-DOTATATE PET/CT imaging. The aim of this investigation is to evaluate whether the increased Ga-DOTATATE activity at the sites of the fracture will cause interpretation difficulty in the localizing the culprit tumor causing TIO. METHOD The images of Ga-DOTATATE PET/CT scan from a total of 54 patients who had multiple foci of increased Ga-DOTATATE PET/CT on PET/CT were retrospectively analyzed. Not only was the intensity of the activity on PET but also the appearance of the activity on CT taken into consideration when the interpretation of the images occurred. The results from imaging analysis were compared with the clinical chart record. All patients had tentative clinical diagnosis of TIO. RESULTS The causative tumors in 53 patients were eventually identified. In 1 patient, the causative tumor was not identified. Among the 53 patients with confirmed TIO, 52 tumors were accurately localized. CONCLUSIONS Mild activity at the sites of fracture is not a major challenging factor in the interpretation of Ga-DOTATATE PET/CT in the evaluation of TIO when both intensity on PET and morphology on CT were assessed.
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Evolution of a Schmorl's Node and a Degenerative Osteophyte on Sequential 68Ga-DOTATATE PET/CT Scans: Potential Pitfalls in Neuroendocrine Tumor Imaging. Clin Nucl Med 2018; 44:e40-e42. [PMID: 30418207 DOI: 10.1097/rlu.0000000000002353] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Schmorl's node (SN) arises from the herniation of the nucleus pulposus of the disc through the cartilaginous endplate into the body of the vertebra. Our report describes a patient with carcinoid tumor who underwent a series of Ga-DOTATATE PET/CT scans for follow-up, demonstrating gradually increasing focal vertebral uptake in absence of CT abnormality, suspicious for a metastasis. Both CT and MRI eventually revealed classical findings of a SN. Also observed in the same vertebra is a degenerative osteophyte showing intense Ga-DOTATATE uptake. This interesting case shows 2 benign spinal lesions, which potentially can simulate bone metastasis in patients with neuroendocrine tumors.
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Abstract
Ga-DOTATATE PET/CT was performed in a 60-year-old man to detect culprit tumor responsible for tumor-induced osteomalacia (TIO). The images revealed multiple foci of abnormal activity in soft tissue lesion, which were not typical of tumor causing TIO in Ga-DOTATATE PET/CT. Considering other neoplastic processes, FDG PET/CT were subsequently performed, which showed all same lesions, although the lesions with highest activity were different between the scans. Pathological examination demonstrated that the patient experienced TIO caused by 1 lesion, but other lesions were due to IgG4-related lymphadenopathy.
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18F-FDG and 68Ga-DOTATATE PET/CT in von Hippel-Lindau Disease-Associated Retinal Hemangioblastoma. Clin Nucl Med 2017; 42:189-190. [PMID: 28033220 DOI: 10.1097/rlu.0000000000001511] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Retinal hemangioblastomas are highly vascular benign tumors that can be encountered either sporadically or within the von Hippel-Lindau (VHL) syndrome. We report a case of a VHL patient with retinal hemangioblastoma who underwent PET/CT scans using F-FDG and Ga-DOTATATE. The tumor showed low-level F-FDG and increased Ga-DOTATATE activity, suggesting cell-surface overexpression of somatostatin receptors. The presented case indicates the clinical applications of somatostatin receptor imaging with Ga-DOTA-conjugated peptides in detection and follow-up of VHL manifestations, screening of asymptomatic gene carriers, and in diagnosis of sporadic retinal hemangioblastomas, which may have similar features on MRI with other retinal tumors.
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Abstract
Fibrous dysplasia of the bone is a developmental benign skeletal disorder characterized by replacement of normal bone and normal bone marrow with abnormal fibro-osseous tissue. We report on a case of a biopsy-proven fibrous dysplasia lesion in the left temporal bone, with intensely increased activity (SUVmax, 56.7) on Ga-DOTATATE PET/CT. The presented data indicate cell surface overexpression of somatostatin receptors by fibrous dysplastic cells and highlight the need of cautious management of Ga-DOTATATE-avid bone lesions, which could mimic malignancy especially in patients with history of neuroendocrine tumors.
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Abstract
Prolonged exposure to cortisol is one of the major causes of avascular bone necrosis (AVN). We report on a case of a woman with Cushing syndrome attributed to ectopic adrenocorticotropic hormone-secreting tumor who was evaluated with whole-body PET/CT study using Ga-DOTATATE. The scan showed increased activity by both femoral heads, corresponding to the margins of bilateral AVN seen on MRI. The presented data suggests AVN-induced reactive inflammatory alterations adjacent to the necrotic segment of the bone, which can be effectively targeted using radiolabeled somatostatin (SST) analogs.
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Abstract
Fibroadenoma is the most common benign breast tumor in women of reproductive age, carrying little to no risk of breast cancer development. We report on a case of a woman with history of neuroendocrine tumor who on follow-up imaging tests underwent whole-body PET/CT study using Ga DOTATATE. The scan showed increased focal activity in the right breast, which was biopsied revealing a fibroadenoma. The presented data suggests cell surface overexpression of somatostatin receptors by this benign breast tumor. Moreover, this finding emphasizes the need for cautious interpretation of Ga DOTATATE-avid breast lesions that could mimic malignancy in neuroendocrine tumor patients.
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Polyostotic Fibrous Dysplasia in McCune-Albright Syndrome Demonstrated on 68Ga-DOTATATE PET/CT. Clin Nucl Med 2017; 41:982-985. [PMID: 27740949 DOI: 10.1097/rlu.0000000000001372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A 33-year-old woman with McCune-Albright syndrome was referred for a Ga-DOTATATE PET/CT study for evaluation and staging of a biopsy-proven pancreatic tail neuroendocrine tumor. The scan demonstrated intense focal octreopeptide uptake corresponding to the known neuroendocrine tumor at the pancreatic tail/splenic hilum. There was no evidence of octreopeptide-avid metastases. Diffuse octreopeptide uptake was demonstrated in multiple bones involving the right side of the skeleton. The concurrent CT demonstrated corresponding expansile lucent changes consistent with the known fibrous dysplasia.
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