RESUMO
Positron emission tomography with 2-((18)F)-fluoro- 2-deoxy-D-glucose (FDG-PET) is a metabolic imaging technique. FDG-PET is more accurate than CT for the evaluation of mediastinal involvement in patients with nonsmall- cell lung cancer, offering a high negative predictive value. It can detect occult metastases in 11% of patients, although the etiology of the extrathoracic isolated uptakes needs confirmation. Theoretically, FDG-PET can influence the planning volume for radiotherapy, primarily in patients with atelectasis. Quantification of metabolic activity using FDG-PET is influenced by the size of the lesion, glucose levels and the time elapsed since the isotope injection. More clinical trials are required to standardize the methods for performing PET, assess its use as a prognostic factor and for the evaluation of treatment response.
Assuntos
Carcinoma Pulmonar de Células não Pequenas/patologia , Fluordesoxiglucose F18 , Neoplasias Pulmonares/patologia , Tomografia por Emissão de Pósitrons , Compostos Radiofarmacêuticos , Tomografia Computadorizada por Raios X , Carcinoma Pulmonar de Células não Pequenas/diagnóstico por imagem , Ensaios Clínicos como Assunto , Humanos , Neoplasias Pulmonares/diagnóstico por imagem , Metástase Linfática , Estadiamento de NeoplasiasRESUMO
We report a primary lymphoma of the prostate, which arose in a 29-year-old man with hematuria. Pathological evaluation of tissue fragments allowed us to choose appropriate medical management. A diagnosis of suspicion can be performed by urine cytology, and molecular techniques may be helpful. Emphasis in differential diagnosis is made.
Assuntos
Linfoma de Células B/patologia , Linfoma Difuso de Grandes Células B/patologia , Neoplasias da Próstata/patologia , Adulto , Humanos , Linfoma de Células B/tratamento farmacológico , Linfoma Difuso de Grandes Células B/tratamento farmacológico , Masculino , Neoplasias da Próstata/tratamento farmacológicoRESUMO
We report a primary lymphoma of the prostate, which arose in a 29-year-old man with hematuria. Pathological evaluation of tissue fragments allowed us to choose appropriate medical management. A diagnosis of suspicion can be performed by urine cytology, and molecular techniques may be helpful. Emphasis in differential diagnosis is made.