RESUMO
PURPOSE: To assess the characteristics of 18F-FDG uptake in elastofibroma dorsi (EFD). METHODS: Seventeen patients with EFD were retrospectively studied. RESULTS: The mean±S.D. of SUV was 2.29±0.60 (range, 1.2-4.3), and the uptake were Grade 0 in 6, Grade 1 in 12, Grade 2 in 7, and Grade 3 in 1. There is no correlation between lesion volume, SUVmax, and computer tomography value. All EFD lesions showed soft tissue density with low or moderate diffused and homogeneous uptake of 18F-FDG. CONCLUSIONS: Mild and moderate uptake of 18F-FDG is frequently observed in EFD, which should be known to avoid making wrong diagnosis.
Assuntos
Fibroma/diagnóstico por imagem , Tomografia por Emissão de Pósitrons , Neoplasias de Tecidos Moles/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Idoso , Idoso de 80 Anos ou mais , Feminino , Fluordesoxiglucose F18 , Humanos , Masculino , Pessoa de Meia-Idade , Imagem Multimodal , Compostos Radiofarmacêuticos , Estudos RetrospectivosRESUMO
The spongy body of the penis metastasis from other primary sites is a rare clinical entity. It is frequently associated with widespread metastatic disease and poor prognosis clinically. We report a case of a 61-year-old man with a previous history of cystectomy due to infiltrating urothelial carcinoma of the bladder 12 months ago and presented with penile shaft swelling pain and hematuria for 3 months. The restaging F-FDG PET/CT scan demonstrated a hypermetabolic mass at his penile shaft. This lesion was confirmed on phallectomy to be infiltrating urothelial carcinoma metastasis from the known primary bladder tumor.
Assuntos
Carcinoma de Células de Transição/diagnóstico por imagem , Neoplasias Penianas/diagnóstico por imagem , Tomografia por Emissão de Pósitrons , Tomografia Computadorizada por Raios X , Neoplasias da Bexiga Urinária/diagnóstico por imagem , Carcinoma de Células de Transição/patologia , Fluordesoxiglucose F18 , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Penianas/secundário , Compostos Radiofarmacêuticos , Neoplasias da Bexiga Urinária/patologiaRESUMO
Myofibroma of the muscle is extremely rare. This report describes a 46-year-old man with myofibroma of the left supraspinous muscle on 18F-FDG PET/CT and includes MRI and 18F-FDG PET/CT findings. Whole-body 18F-FDG PET/CT showed abnormal tracer uptakes in the left supraspinous muscle, which was subsequently confirmed as myofibroma by histopathology.
Assuntos
Imagem Multimodal , Miofibroma/diagnóstico por imagem , Tomografia por Emissão de Pósitrons , Tomografia Computadorizada por Raios X , Fluordesoxiglucose F18 , Humanos , Masculino , Pessoa de Meia-Idade , Compostos RadiofarmacêuticosRESUMO
Metastatic malignant fibrous histiocytoma (MFH) in the stomach is extremely rare. We report a 73-year-old man with MFH in the left popliteal fossa that metastasized to the stomach. Whole-body F-FDG PET/CT showed abnormal tracer uptakes in the stomach, which was subsequently confirmed as metastatic MFH.
Assuntos
Fluordesoxiglucose F18 , Histiocitoma Fibroso Maligno/diagnóstico por imagem , Imagem Multimodal , Tomografia por Emissão de Pósitrons , Compostos Radiofarmacêuticos , Neoplasias Gástricas/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Idoso , Histiocitoma Fibroso Maligno/patologia , Humanos , Masculino , Metástase Neoplásica , Neoplasias Gástricas/patologiaRESUMO
Pulmonary alveolar proteinosis is a rare lung disease caused by diffuse, abnormal intra-alveolar surfactant accumulation. Here, we report a case of autoimmune pulmonary alveolar proteinosis with heterogeneous accumulation of F-FDG in both lungs shown on the combined F-FDG PET/CT.
Assuntos
Doenças Autoimunes/diagnóstico por imagem , Neoplasias Pulmonares/diagnóstico por imagem , Tomografia por Emissão de Pósitrons , Proteinose Alveolar Pulmonar/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Diagnóstico Diferencial , Fluordesoxiglucose F18 , Humanos , Masculino , Pessoa de Meia-Idade , Imagem Multimodal , Compostos RadiofarmacêuticosRESUMO
PURPOSE: To evaluate value of a new method in detecting bladder lesion with (18)F-FDG PET/CT. METHODS: Routine and delayed scans of 14 patients were retrospectively studied. All these bladder lesions were confirmed by pathology. By increasing display threshold of SUVmax, routine images were analyzed for the second time. RESULTS: Of 12 (18)F-FDG-avid cases, 10 cases were confirmed to be primary bladder carcinoma, 2 false-positive cases were inflammation. There were 25% positive cases on routine display and 50% on display with increased SUVmax threshold. CONCLUSION: The method can effectively increase the sensitivity and accuracy in detecting bladder cancer with (18)F-FDG PET/CT.
Assuntos
Fluordesoxiglucose F18 , Processamento de Imagem Assistida por Computador/métodos , Tomografia por Emissão de Pósitrons/métodos , Tomografia Computadorizada por Raios X/métodos , Neoplasias da Bexiga Urinária/diagnóstico , Imagem Corporal Total/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Cistoscopia , Diagnóstico Diferencial , Estudos de Viabilidade , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Compostos Radiofarmacêuticos , Reprodutibilidade dos Testes , Estudos RetrospectivosRESUMO
Xanthogranulomatous osteomyelitis is a rare inflammatory process characterized histologically by collection of foamy macrophages admixed with mononuclear cells. We describe 2 cases with chest and back pain; radiography and CT scan identified expansile osteolytic rib destructive lesions with soft tissue mass. F-FDG PET/CT revealed accumulation of F-FDG similar to malignancy. Xanthogranulomatous osteomyelitis was histologically confirmed with numerous foamy histiocytes admixed with inflammatory infiltrate.