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Clinical Nuclear Medicine

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https://www.readbyqxmd.com/read/28719451/pancreatic-ductal-adenocarcinoma-with-high-radiotracer-uptake-in-68ga-prostate-specific-membrane-antigen-pet-ct
#1
Samine Sahbai, Petra Rieping, Christina Pfannenberg, Christian la Fougère, Matthias Reimold
Prostate-specific membrane antigen imaging with PET/CT is increasingly used in prostate cancer and was shown to have a high diagnostic performance. We report a clinical case of a 67-year-old man with previous history of operated prostate cancer and increasing prostate-specific antigen blood level. Ga-HBED-CC prostate-specific membrane antigen PET/CT imaging was indicated for the assessment of local recurrence and lymph node metastases of prostate cancer. In addition, a soft tissue mass in the body of the pancreas with high radiotracer uptake was detected...
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719450/combination-of-177lu-psma-617-and-external-radiotherapy-for-the-treatment-of-cerebral-metastases-in-patients-with-castration-resistant-metastatic-prostate-cancer
#2
Xiao Wei, Carl Schlenkhoff, Bettina Schwarz, Markus Essler, Hojjat Ahmadzadehfar
Two castration-resistant prostate cancer patients, both with cerebral and visceral and lymphatic metastases, received multiple cycles of Lu-PSMA-617 treatments. The prognosis of both cases is dependent on brain metastases. Between Lu-PSMA-617 treatment cycles, local radiotherapy was also applied to the brain metastases. Prior to the combined therapy, all systemic metastases, including cerebral lesions, showed PSMA expression using Ga-PSMA PET/CT. Under the combined therapy, all the metastases, particularly the cerebral lesions, showed significant regression in size and PSMA expression over time...
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719449/68ga-dotatate-uptake-in-solitary-pancreatic-metastasis-from-clear-cell-renal-cancer
#3
Shankar Vamadevan, Ken Le, Lily Shen, Han Loh, Robert Mansberg
A 64-year-old man with a lesion of the pancreatic tail was referred for Ga-DOTATATE PET/CT imaging. His medical history included previous metastatic clear cell renal cell cancer. Ga-DOTATATE PET/CT demonstrated increased DOTATATE uptake (SUVmax 10.5) in a pancreatic tail lesion. Histopathology of the resected lesion confirmed clear renal cell cancer metastasis. This case illustrates that clear cell renal cancer metastasis can demonstrate Ga-DOTATATE accumulation.
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719448/biopsy-proven-diffuse-mediastinal-prostate-cancer-metastases-negative-on-18f-fluorocholine-diagnosed-on-68ga-psma-and-18f-psma-pet-ct
#4
Guillaume Chaussé, Tamim Niazi, Gad Solomon Abikhzer, Stephan Michael Probst
A 72-year-old man with prostate cancer (stage T3b, Gleason score 7) treated by radical prostatectomy was found to have biochemical failure (prostate-specific antigen 8.5 ng/mL) and a suspicious growing nodularity at the left prostate bed on MRI. F-fluorocholine PET/CT failed to demonstrate any site of uptake suggestive of malignancy. A bone scan did exclude bone metastases. Ga-PSMA PET/CT revealed various positive lymph nodes in the supraclavicular, mediastinal, and hilar regions. This was confirmed on F-DCFPyl PET/CT, with the addition of a suspicious right axillary lymph node...
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719447/diffuse-increased-sodium-fluoride-gastric-activity-in-a-patient-with-hypercalcemia
#5
Fuqiang Shao, Shumao Zhang, Chi Qi, Yu Wang, Yue Chen
Increased extraosseous uptake of sodium fluoride can be visualized because of many different etiologies. A 62-year-old man with a history of osteoporosis had an F-sodium fluoride PET/CT scan for accessing chest pain caused by an accident. The images showed multiple fractures. Unexpectedly, diffuse activity was noted in the gastric wall, which was suggestive of possible hypercalcemia. The serum calcium level confirmed the patient had hypercalcemia.
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719446/tophaceous-gout-of-the-lumbar-spine-mimicking-malignancy-on-fdg-pet-ct
#6
Qian Zhao, Aisheng Dong, Yushu Bai, Yang Wang, Changjing Zuo
A 46-year-old man with over a 10-year history of gout complained of progressive bilateral buttock pain with numbness of legs for 4 months. Serum uric acid level was elevated. Lumbar radiographs showed decreased density of the bilateral L4-L5 facet joints. CT showed lytic lesions of the facet joints with hyperdense periarticular lesions. Enhanced MRI showed marked enhancement of these lesions. FDG PET/CT showed avid FDG uptake of the bony and periarticular lesions with SUVmax of 16.8. A decompressive posterior lumbar laminectomy with periarticular lesion resection was performed...
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719445/adefovir-induced-hypophosphatemic-osteomalacia-mimicking-bone-metastases-from-primary-hepatocarcinoma
#7
Wei-Jun Wei, Zhen-Kui Sun, Chen-Tian Shen, Zhong-Ling Qiu, Quan-Yong Luo
Adefovir-induced hypophosphatemic osteomalacia in the context of hepatocarcinoma is rare and needs to be differentiated from metastatic hepatocarcinoma. We here report a case of severe osteomalacia whose focal uptakes of radiotracer on the Tc-MDP SPECT/CT images mimicked that of metastatic hepatocarcinoma.
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719444/oligometastatic-stomach-carcinoma-from-lung-squamous-cell-carcinoma-detected-by-18f-fdg-pet-ct
#8
Wei Wang, Leilei Yuan, Ying Kan, Jigang Yang
Metastasis from squamous cell carcinoma of the lung to the stomach is extremely rare. F-FDG PET/CT demonstrated intense F-FDG uptake in the lower lobe of the left lung, stomach, and mediastinal lymph node in a 61-year-old man. Lower lobe of the left lung resection, mediastinal lymphadenectomy, partial gastrectomy, and esophagogastric anastomosis was performed. Immunohistochemical studies revealed squamous cell lung carcinoma in the left lung and metastatic carcinoma of gastric and lymph nodes. The present case further demonstrated the value of F-FDG PET/CT in the staging of malignant disease...
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719443/18f-fdg-pet-ct-scan-can-predate-clinical-presentation-in-acute-appendicitis
#9
Syed Zama Ali, Loi Hoi Yin, Khor Lih Kin, Arvind Kumar Sinha, Li Mei Poon
Acute appendicitis is a clinical diagnosis typically presenting with right lower quadrant pain. We describe the case of an asymptomatic 53-year-old man with stage 2A diffuse large B-cell lymphoma, who underwent F-FDG PET/CT at the completion of chemotherapy. The scan showed complete lymphomatous disease remission. Incidentally, there was increased FDG uptake in a tubular structure adjacent to the cecum. Clinical examination was negative. Subsequently, the patient presented 6 days later with typical acute appendicitis symptoms...
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28682848/false-positive-uptake-in-bilateral-gynecomastia-on-68ga-psma-pet-ct-scan
#10
Arun Sasikumar, Ajith Joy, Bindu P Nair, M R A Pillai, Jayaprakash Madhavan
A 66-year-old man on hormonal therapy with prostate cancer was referred for Ga-PSMA PET/CT scan for biochemical recurrence. Ga-PSMA PET/CT scan detected moderate heterogeneous tracer concentration in bilateral breast parenchyma, in addition to the abnormal tracer concentration in enlarged prostate gland, right external iliac lymph node, and sclerotic lesion in L4 vertebra. On clinical examination, he was found to have bilateral gynecomastia. Abnormal concentration of Ga-PSMA in breast cancer is now well known, and in this context, it is important to know that tracer localization can occur in gynecomastia as well, as evidenced in this case...
July 6, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28682847/metastatic-neuroblastoma-in-adult-patient-presenting-as-a-super-scan-on-68ga-dotanoc-pet-ct-imaging
#11
Dharmender Malik, Abhiram Jois, Harmandeep Singh, Girdhar S Bora, Rajender Kumar Basher, Bhagwant Rai Mittal
We report a case of 23-year-old man who presented with complaints of progressive abdominal distension for the past 3 months along with the loss of appetite and weight and had a large solid cystic mass in the left half of the abdominal cavity revealed on ultrasonography and contrast-enhanced CT of the abdomen. Subsequent biopsy and histopathology revealed it to be neuroblastoma. Ga-DOTANOC PET/CT scan performed to rule out distant metastasis showed intense radiotracer uptake distributed throughout the skeleton, mimicking a super scan...
July 6, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28682846/punctate-radiation-dermatitis-of-the-foot-and-ankle-caused-by-distal-embolization-of-90y-microspheres-during-liver-directed-therapy
#12
Benjamin B Nia, Emily S Nia, Ryan J Avery, Phillip H Kuo, Charles T Hennemeyer
A 41-year-old man with gastric adenocarcinoma presented with hepatic metastases. The metastases were refractory to systemic chemotherapy, so radioembolization with Y microspheres was performed. Because of stasis or saturation of the tumor with embolic particles, 79% of the microspheres were injected. At follow-up, the patient complained of "red bumps" that had developed on his right foot/ankle the day after the radioembolization. Because a portion of the dose was still in the catheter when withdrawn from the right femoral artery, the interventional radiologist used a Geiger counter to confirm radioactivity in the cutaneous lesions and thus the distal embolization of the microspheres...
July 6, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28682845/incidental-papillary-bladder-carcinoma-on-18f-fluoromethylcholine-pet-ct-undertaken-to-evaluate-prostate-malignancy
#13
Amit Parekh, Ian Hagan, Lisa Capaldi, Iain Lyburn
FDG PET is known to have a low sensitivity for the detection of prostate and bladder tumors because of high levels of urinary excretion, which potentially obscures sites of disease. Fluoromethylcholine PET has a higher sensitivity for the detection of metastatic prostate cancer compared with F-FDG PET, partly because of lower levels of urinary excretion. We present a case of a patient who underwent F-fluoromethylcholine PET for possible recurrent prostate cancer. The study identified an incidental, avid metachronous bladder tumor...
July 6, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28682844/whole-body-68ga-dotanoc-pet-mri-versus-68ga-dotanoc-pet-ct-in-patients-with-neuroendocrine-tumors-a-prospective-study-in-28-patients
#14
Dominik Berzaczy, Chiara Giraudo, Alexander R Haug, Markus Raderer, Daniela Senn, Georgios Karanikas, Michael Weber, Marius E Mayerhoefer
PURPOSE: The aim of this study was to assess the diagnostic performance of simultaneous whole-body Ga-DOTANOC PET/MRI compared with Ga-DOTANOC PET/CT for detection of distant metastatic disease in patients with well-differentiated neuroendocrine tumors (NETs). METHODS: Patients with histologically proven, well-differentiated NET (G1 or G2) were included in this prospective, institutional review board-approved study. Patients underwent Ga-DOTANOC PET/CT and subsequent Ga-DOTANOC PET/MRI after a single tracer injection on the same day for staging or restaging purposes...
July 6, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28682843/diffuse-thyroid-metastasis-from-lung-cancer-mimicking-thyroiditis-on-99mtc-pertechnetate-scintigraphy
#15
Rui Gao, Shan Gao, Jinteng Feng, Yuanbo Wang, Guangjian Zhang
Possible thyroiditis was suspected in a 56-year-old man who initially presented sore throat because laboratory examinations revealed decreased serum thyroid hormone and the Tc-pertechnetate scintigraphy showed no tracer uptake by the thyroid gland. However, subsequent examination demonstrated that the absence of pertechnetate activity in the thyroid was due to complete replacement of thyroid gland by the metastasis from lung adenocarcinoma, which was unknown at the initial presentation.
July 6, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28682842/dual-isotope-spect-study-with-epilepsy-patients-using-semiconductor-spect-system
#16
Tohru Shiga, Atsuro Suzuki, Kotarou Sakurai, Tsugiko Kurita, Wataru Takeuchi, Takuya Toyonaga, Kenji Hirata, Keiji Kobashi, Chietsugu Katoh, Naoki Kubo, Nagara Tamaki
PURPOSE: We developed a prototype CdTe SPECT system with 4-pixel matched collimator for brain study. This system provides high-energy-resolution (6.6%), high-sensitivity (220 cps/MBq/head), and high-spatial-resolution images. The aim of this study was to evaluate dual-isotope study of CBF and central benzodiazepine receptor (BZR) images using Tc-ECD and I-IMZ with the new SPECT system in patients with epilepsy comparing with single-isotope study using the conventional scintillation gamma camera...
July 6, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28650891/pretreatment-primary-tumor-suvmax-on-18f-fdg-pet-ct-images-predicts-outcomes-in-patients-with-salivary-gland-carcinoma-treated-with-definitive-intensity-modulated-radiation-therapy
#17
Cheng-En Hsieh, Kung-Chu Ho, Chia-Hsun Hsieh, Tzu-Chen Yen, Chun-Ta Liao, Hung-Ming Wang, Chien-Yu Lin
PURPOSE: The aim of this study was to investigate the prognostic significance of F-FDG uptake in salivary gland carcinoma (SGC) patients treated with definitive intensity-modulated radiation therapy (IMRT). METHODS: We retrospectively examined 46 SGC patients who received pretreatment F-FDG PET/CT and definitive IMRT between 2007 and 2014. Most tumors were located in the minor salivary glands (n = 35 [76%]). Forty-six percent (n = 21) of the participants had unresectable disease...
June 24, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28650890/solitary-choroidal-metastasis-from-lung-adenocarcinoma-on-fdg-pet-ct
#18
Zu-Gui Li
Solitary choroidal metastasis as an initial presentation of lung cancer is rare. A 67-year-old woman who initially presented with a 3-month history of blurred vision in the right eye was suggestive of choroidal melanoma on MRI. Preoperatively, a pulmonary mass was found on x-ray. She was referred for an FDG PET/CT imaging, which revealed a choroidal lesion with minimal FDG uptake in right eye and increased FDG activity in the known lung mass. A pathological diagnosis of metastatic lung adenocarcinoma was made after enucleation of the right eyeball...
June 24, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28650889/occult-renal-granulomatous-inflammatory-lesions-in-granulomatosis-with-polyangiitis-detected-by-18f-fdg-pet-ct
#19
Zhanli Fu, Meng Liu, Ziao Li, Jin Zhang, Qian Li
A 33-year-old woman with a 7-month history of granulomatosis with polyangiitis F-FDG PET/CT scan due to low-grade intermittent fever and elevation of serum inflammatory markers, which revealed multiple hypermetabolic lesions in bilateral kidneys. Biopsy of a lesion showed granulomatosis with polyangiitis, consistent with renal involvement of granulomatosis with polyangiitis.
June 24, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28650888/false-positive-uptake-of-radioiodine-in-renal-hamartoma-in-a-patient-with-differentiated-thyroid-cancer
#20
Guohua Shen, Zhongzhi Qi, Rui Huang, Bin Liu, Anren Kuang
A 46-year-old woman with a history of papillary thyroid cancer status post total thyroidectomy underwent the second I radioiodine ablation therapy for lung metastases. Posttherapeutic whole-body I planar images showed diffuse uptake in the lungs and intense focal activity in both sides of the upper abdomen. SPECT/CT of the abdomen localized the uptake in the upper pole of the left kidney and the lower pole of the right kidney. The patient received bilateral partial nephrectomy with pathology demonstrating that these 2 renal lesions were renal hamartomas...
June 24, 2017: Clinical Nuclear Medicine
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