RESUMO
ABSTRACT: We report the case of a 64-year-old woman with musculoskeletal pain and elevated serum parathyroid hormone who had undergone parathyroidectomy for primary hyperparathyroidism 4 years earlier. An 18F-choline PET/CT scan was performed and incidentally showed an intense uptake in a right upper lobe pulmonary nodule and in the right hilar, mediastinal, and cervical lymph nodes. Histopathological analysis confirmed the diagnosis of a small cell lung cancer. Clinical symptoms and recurrent hyperparathyroidism were therefore consistent with a paraneoplastic syndrome. A complete metabolic response was achieved on 18F-FDG PET/CT scan after chemotherapy.
Assuntos
Colina/análogos & derivados , Hiperparatireoidismo/cirurgia , Achados Incidentais , Neoplasias Pulmonares/diagnóstico por imagem , Paratireoidectomia , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Carcinoma de Pequenas Células do Pulmão/diagnóstico por imagem , Feminino , Humanos , Hiperparatireoidismo/complicações , Hiperparatireoidismo/diagnóstico por imagem , Neoplasias Pulmonares/complicações , Pessoa de Meia-Idade , Carcinoma de Pequenas Células do Pulmão/complicaçõesRESUMO
We report interesting images of a pelvic mass in an 11-year-old girl. She presented with fever, chronic fatigue, and weight loss without abdominal pain. Abdominal ultrasound, contrast-enhanced CT, and F-FDG PET/CT were equivocal. F-FDG PET/CT revealed an irregular, intense FDG-avid pelvic mass in close contact with the bladder. Both infectious and malignancy complications were suspected, but pathological examination confirmed a urachal abscess. As most of the urachal carcinomas are mucinous adenocarcinomas with low or non-FDG uptake, intense uptake might indicate an abscess rather than a carcinoma.
Assuntos
Abscesso/diagnóstico por imagem , Carcinoma/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Neoplasias da Bexiga Urinária/diagnóstico por imagem , Infecções Urinárias/diagnóstico por imagem , Criança , Diagnóstico Diferencial , Feminino , Fluordesoxiglucose F18 , Humanos , Compostos RadiofarmacêuticosRESUMO
F-FDG PET-CT used to lack of resolution to detect vasculitis in the superficial cranial and cervical arteries. Very few cases, for which some of these arteries were visualized, are published, and the images were acquired using a dedicated PET protocol. We present a case, acquired using a routine whole-body protocol, with increased tracer uptake detected in vertebral arteries, internal and external carotid arteries, superficial temporal arteries, occipital arteries, maxillary arteries, facial arteries, and lingual arteries. It underlines the potential for newer-generation PET-CT system to assess vasculitis. F-FDG PET-CT may have an important role to detect and follow vasculitis in the future.