RESUMO
ABSTRACT: Meningiomas are benign extra-axial tumors of the central nervous system. Extracranial meningiomas are extremely rare (2%) and can develop as a direct extension from a primary intracranial meningioma or as a true primary extracranial meningioma originating from ectopic arachnoid cells. We report an extremely unusual case of a 61-year-old woman who was diagnosed with pelvic meningioma with the help of PET/CT and PET/CT-guided biopsy. The clinicopathological features of the patient and immunoprofile of the tumor are presented.
Assuntos
Neoplasias Meníngeas , Meningioma , Ossos Pélvicos , Feminino , Humanos , Pessoa de Meia-Idade , Meningioma/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Fluordesoxiglucose F18 , Neoplasias Meníngeas/diagnóstico por imagemRESUMO
Glu-NH-CO-NH-Lys-(Ahx)-[Ga-68(HBED-CC)], abbreviated as Ga-PSMA, is a novel radiotracer undergoing evaluation for PET/CT imaging of prostate carcinoma. Its major advantage is the sensitive detection of lesions even at low prostate-specific antigen level and high target-to-background ratios obtained in metastatic lesions, which is better than that obtained with F-fluoromethylcholine. We present the case of a 28-year-old man with poorly differentiated prostate carcinoma with neuroendocrine differentiation, whose lesions did not show significant Ga-PSMA localization. As literature on utility of Ga-PSMA PET/CT for imaging prostate carcinoma grows, it is important to be aware of potential false negatives that could influence study results.
Assuntos
Carcinoma/diagnóstico por imagem , Ácido Edético/análogos & derivados , Tumores Neuroendócrinos/diagnóstico por imagem , Oligopeptídeos , Tomografia por Emissão de Pósitrons , Neoplasias da Próstata/diagnóstico por imagem , Compostos Radiofarmacêuticos , Tomografia Computadorizada por Raios X , Adulto , Carcinoma/patologia , Isótopos de Gálio , Radioisótopos de Gálio , Humanos , Masculino , Imagem Multimodal , Tumores Neuroendócrinos/patologia , Neoplasias da Próstata/patologiaRESUMO
Hepatic tuberculosis is an unusual form of extrapulmonary tuberculosis and constitutes less than 1% of all cases of tuberculosis. Imaging studies for hepatic tuberculosis are nonspecific and mimic primary or metastatic carcinoma. Here we present ¹8F-FDG PET/CT images of a 25-year-old male patient with isolated hepatic tuberculosis.
Assuntos
Fluordesoxiglucose F18 , Neoplasias Hepáticas/patologia , Imagem Multimodal , Tomografia por Emissão de Pósitrons , Tomografia Computadorizada por Raios X , Tuberculose Hepática/diagnóstico por imagem , Adulto , Diagnóstico Diferencial , Humanos , Masculino , Metástase NeoplásicaAssuntos
Dermatomiosite/complicações , Dermatomiosite/terapia , Neoplasias Nasofaríngeas/complicações , Neoplasias Nasofaríngeas/terapia , Síndromes Paraneoplásicas/etiologia , Síndromes Paraneoplásicas/terapia , Adulto , Carcinoma , Quimiorradioterapia/métodos , Dermatomiosite/diagnóstico , Humanos , Índia , Masculino , Carcinoma Nasofaríngeo , Neoplasias Nasofaríngeas/diagnóstico , Síndromes Paraneoplásicas/diagnósticoRESUMO
Isolated asymptomatic brain metastasis in papillary carcinoma thyroid (PCT) is extremely rare. We here present such a case of a 48-year-old woman with PCT. SPECT/CT localized the 131I radiotracer concentration seen on whole-body scan in this patient to the right posterior parietal cortex, suggesting brain metastasis. Contrast-enhanced MRI and 18F-FDG PET/CT confirmed the diagnosis and the patient was taken for gamma-knife radiosurgery. 131I SPECT/CT in this case accurately restaged the patient by detecting asymptomatic isolated brain metastasis and correctly directed the management strategy.
