RESUMEN
Metastatic carcinoma to the thyroid gland rarely is encountered in clinical practice; however, autopsy series have shown that it is not a rare occurrence. A case of adenocarcinoma of the colon with metastases to the thyroid is reported. A review of the literature reveals that melanoma, breast, renal, and lung carcinomas are the most frequent tumors to metastasize to the thyroid. Metastatic disease must be considered in the differential diagnosis of cold nodules on radionuclide thyroid scans, particularly in patients with a known primary.
Asunto(s)
Adenocarcinoma/secundario , Neoplasias del Colon/cirugía , Neoplasias de la Tiroides/secundario , Adenocarcinoma/diagnóstico por imagen , Adenocarcinoma/cirugía , Adenoma/diagnóstico por imagen , Femenino , Humanos , Radioisótopos de Yodo , Neoplasias Hepáticas/secundario , Neoplasias Hepáticas/cirugía , Persona de Mediana Edad , Cintigrafía , Pertecnetato de Sodio Tc 99m , Neoplasias de la Tiroides/diagnóstico por imagen , Neoplasias de la Tiroides/cirugíaRESUMEN
Metastatic pulmonary nodules from a well-differentiated hepatoma were well demonstrated by a Tc-99m-labeled hepatobiliary imaging agent. Uptake of this type of radionuclide by metastases from a primary hepatic malignancy has not previously been reported. Such radiopharmaceuticals may prove useful in the future as imaging agents for primary hepatobiliary tumors.
Asunto(s)
Carcinoma Hepatocelular/diagnóstico por imagen , Iminoácidos , Neoplasias Hepáticas/diagnóstico por imagen , Neoplasias Pulmonares/diagnóstico por imagen , Tecnecio , Adulto , Femenino , Humanos , Iminoácidos/metabolismo , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/secundario , Compuestos de Organotecnecio , Cintigrafía , Tecnecio/metabolismoRESUMEN
Metastatic serosal and omental implants from a primary papillary endometrial carcinoma were well demonstrated by radionuclide uptake on a bone scan utilizing 99mTc-methylene diphosphonate. Imaging of an endometrial malignancy by a 99mTc-labeled phosphate compound has not previously been reported. While the exact mechanism of accumulation in such soft-tissue neoplastic foci is not known, several possibilities have been suggested. In this particular case, the mechanism appears related in some way to the presence of dystrophic calcifications within the metastatic deposits.
Asunto(s)
Neoplasias Abdominales/diagnóstico por imagen , Carcinoma Papilar/patología , Difosfonatos , Tecnecio , Neoplasias Uterinas/patología , Femenino , Humanos , Persona de Mediana Edad , Metástasis de la Neoplasia , CintigrafíaRESUMEN
The value of 67 Ga-citrate scanning in cases of gastrointestinal malignancies is discussed. Seven cases are presented, including lymphomas of the stomach, small bowel, and rectum, and adenocarcinomas of the stomach and colon. In a review of the literature, there is general pessimism regarding the use of 67Ga scans in GI malignancies. Based on previous reports and our own experience, specific clinical situations are cited in which the scan is of considerable value for diagnosis and followup of GI malignancy.
Asunto(s)
Adenocarcinoma/diagnóstico por imagen , Radioisótopos de Galio , Neoplasias Gastrointestinales/diagnóstico por imagen , Linfoma/diagnóstico por imagen , Adulto , Anciano , Neoplasias del Ciego/diagnóstico por imagen , Femenino , Humanos , Neoplasias Intestinales/diagnóstico por imagen , Linfoma de Células B Grandes Difuso/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia , Cintigrafía , Neoplasias del Recto/diagnóstico por imagen , Neoplasias Gástricas/diagnóstico por imagen , Recuento Corporal TotalRESUMEN
An analysis of one year's experience at our institution with 781 cerebral radioangiograms is reported. In patients who had follow-up radioangiographic evaluation, an overall accuracy of 88% was achieved using the anterior method. Accuracy in detecting carotid occlusive lesions alone was 83%. Detection of subdural hematomas by radioangiography was exceptional. Our results correlate well with those of others in detection of cerebrovascular occlusive disease, other vascular lesions, and avascular lesions. In our experience, the extremely high yield of information and the simplicity of performing radioangiography of the head and neck justify its routine use in all cases referred for brain scanning.