The value of PET (Positron Emission Tomography) in colorectal cancer is presented. PET is a novel technique that uses F-18-FDG (fluorodeoxiglucose) to assess glucose metabolism by whole body imaging. It has been demonstrated that malignant cells have both increase of glucose uptake and utilization. In colorectal cancer, PET is indicated for staging, assess recurrence, liver metastasis and treatment follow-up. PET is more sensitive and specific than CT (Computed Tomography) and is cost effective. In 30% of cases PET may change patient management, avoiding unnecessary procedures.
Normal 131 Iodine uptake values at 2 and 24 hours Background: Radiolabeled iodine uptake is a useful tool in the study of thyroid diseases. Aim: To obtain normal values for 131 Iodine thyroid uptake in healthy volunteers. Material and methods: A total of 105 subjects were included (52 males and 53 females), with a mean age of 45 years (range: 20 to 68, evenly distributed in decades). A questionnaire was applied and a clinical examination was performed to rule out endocrine diseases. Serum TSH and anti-thyroperoxidase antibodies were also measured. The oral 131 I dose was 5-10 µCi, and a Thyrad equipment was used for measurements at 2 and 24 h.
Positron emission tomography (PET) with fluorine-18 labeled deoxyglucose (FDG) is useful in the management of lymphomas. In this review, some general concepts of this metabolic test are defined. It has an excellent diagnostic yield in (Rev Méd Chile 2006; 134: 910-9E l linfoma es una patología maligna del sistema linfático, potencialmente curable en una importante proporción de pacientes, con buena respuesta a quimioterapia, radioterapia o ambas.La incidencia de linfoma no Hodgkin (LNH) está en aumento en el mundo occidental y se ha observado asociación con diversas patologías virales, en especial con infección por virus de inmunodeficiencia humana. El linfoma de Hodgkin (LH) también ha aumentado su incidencia, asociándose a otras infecciones virales. Paralelamente, la terapia y sobrevida han mejorado, lo cual conduce a mayor número de pacientes que pueden presentar efectos indeseables tardíos de la terapia, más relevantes en población de menor
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