Soft tissue metastases from differentiated thyroid cancer

SUMMARY Distant metastases of differentiated thyroid cancer are unusual; lung and bones are the most frequently affected sites. Soft tissue metastases (STM) are extremely rare. We describe two ca-ses of patients with differentiated thyroid cancer metastasizing to soft tissues. Both patients had widespread metastatic disease; clinically asymptomatic soft tissue metastases were found by 18 -Fluordeoxyglucose positron emission tomography/computed tomography ( 18 F FDG PET-CT), and confirmed by cytological and/or histopathological studies. These findings underscore the ability of 18 F FDG PET-CT in accurately assessing the extent of the disease, as well as the utility of the method to evaluate regions of the body that are not routinely explored. Arq Bras Endocrinol Metab. 2013;57(4):00-00 SUMARIO As metastases a distância em carcinoma diferenciado de tireoide sao raras. Pulmao e ossos sao os lugares mais frequentemente atingidos. As metastases em tecidos moles sao extremamen-te infrequentes. Neste artigo, descrevemos dois casos de pacientes com câncer diferenciado de tireoide com metastases em tecidos moles. Ambos os pacientes padeciam de enfermida-de avancada. As metastases em partes moles foram assintomaticas e detectadas mediante