RESUMO
ABSTRACT: A 56-year-old man with thoracal mass suspected of solitary plasmacytoma was referred for 18 F-FDG PET-CT scan. His PET-CT revealed FDG-avid rib mass and cervical lesion at level 2. He also underwent 18 F-fluorocholine (FCH) PET-CT to evaluate possible metastatic spread of the disease. FCH PET-CT showed increased uptake at the rib mass, while the cervical lesion was not FCH-avid. Biopsies confirmed rib lesion was a solitary plasmacytoma; however, the cervical lesion was an amyloid deposited lymph node. This case showed FCH PET-CT is a valuable companion of FDG scan for the evaluation of plasma cell dyscrasias with a better specificity.
Assuntos
Colina/análogos & derivados , Fluordesoxiglucose F18 , Linfadenopatia , Plasmocitoma , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Humanos , Masculino , Pessoa de Meia-Idade , Plasmocitoma/diagnóstico por imagem , Plasmocitoma/patologia , Linfadenopatia/diagnóstico por imagem , Amiloide/metabolismoRESUMO
ABSTRACT: 18F-FDG PET/CT imaging of a 68-year-old woman with a known clinical diagnosis of systemic lupus erythematosus and recent-onset ataxia revealed FDG-avid soft tissue masses in bilateral renal sinuses and mildly increased bone marrow activity. Consecutive tissue sampling with fine-needle biopsy from renal sinus masses confirmed mass-forming extramedullary hematopoiesis corresponding to FDG-avid soft tissue lesions. Here we present a rare case of bilateral mass-forming extramedullary hematopoiesis at renal sinuses incidentally detected on 18F-FDG PET/CT imaging.
Assuntos
Fluordesoxiglucose F18 , Hematopoese Extramedular , Idoso , Medula Óssea , Feminino , Humanos , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Tomografia por Emissão de Pósitrons/métodosRESUMO
ABSTRACT: A 47-year-old woman with atypical pituitary adenoma was referred to the neurosurgery department due to recent back pain. She had multiple transsphenoidal surgery, stereotactic body radiation, and 177Lu-DOTATATE therapy. Her spinal MRI showed multiple spinal masses. The patient underwent 68Ga-DOTATATE PET/CT to confirm the metastatic spread of the disease. PET/CT images showed increased uptake at the local recurrent tumor site and spinal metastases confirmed by biopsy to pituitary carcinoma. Our case presents the role of 68Ga-DOTATATE PET/CT in patients with pituitary carcinoma.
Assuntos
Adenoma , Compostos Organometálicos , Neoplasias Hipofisárias , Feminino , Humanos , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Neoplasias Hipofisárias/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia ComputadorizadaRESUMO
A 60-year-old woman with recurrent urinary tract infection who had several operations for colorectal carcinoma underwent Tc-DMSA renal scintigraphy which showed an unexpected accumulation of radiotracer in the colon. When symptoms were reviewed, we noticed that she was suffering from pneumaturia and fecaluria which raised the suspicion of enterovesical fistula. Rectal contrast-enhanced computer tomography of pelvis demonstrated enterovesical and enterovaginal fistulas. Colonic radioactivity was considered to be related to retrograde peristalsis of Tc-DMSA from bladder activity via enterovesical fistula. In patients with pelvic surgeries and radiotherapy, radioactivity in the colon should raise the suspicion of enterovesical fistula.
