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Inicio Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) Uterine leiomyosarcoma metastatic to thyroid shown by 18F-FDG PET/CT imaging
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Vol. 36. Issue 2.
Pages 113-115 (March - April 2017)
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Vol. 36. Issue 2.
Pages 113-115 (March - April 2017)
Clinical note
Uterine leiomyosarcoma metastatic to thyroid shown by 18F-FDG PET/CT imaging
Metástasis tiroidea de un leiomiosarcoma uterino detectada mediante 18F-FDG PET/TC
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M. Gauthéa,b, N. Testart Dardelc,
Corresponding author
nathalietestart@gmail.com

Corresponding author.
, C. Nascimentoa, M. Trassardd, A. Banale, J.-L. Alberinia,f
a Institut Curie, Service de Médecine Nucléaire, Saint-Cloud, France
b Hôpital Tenon-APHP, Médecine Nucléaire, Paris, France
c Servicio de Medicina Nuclear, Complejo Hospitalario Universitario de Granada, Granada, Spain
d Institut Curie, Service d’Anatomie Pathologique, Saint-Cloud, France
e Institut Curie, Service de Chirurgie, Saint-Cloud, France
f Institut Curie, Department of Nuclear Medicine, Saint-Cloud, France
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Abstract

About one third of focal thyroid uptakes in a fluorodeoxyglucose (FDG) positron emission tomography/computerized tomography (PET/CT) study are malignant, the most frequent histological type being papillary carcinoma. Metastases to the thyroid account for approximately 7.5% of thyroid malignancies and come mainly from kidney, lung, head and neck, and breast cancers. We report the case of a 64-year-old woman presenting a fast growing thyroid nodule whose primitive or metastatic origin was not obvious, for which 18F-FDG PET/CT helped in the diagnostic process and in the later management of the patient. Histopathologic findings finally revealed a metastasis of uterine leiomyosarcoma.

Keywords:
PET/CT
Thyroid
Sarcoma
Uterus
Leiomyosarcoma
Resumen

En los estudios de tomografía por emisión de positrones/tomografía computarizada (PET/TC) con fluorodesoxiglucosa (FDG), aproximadamente un tercio de las captaciones focales tiroideas son de naturaleza maligna, siendo lo más frecuente el carcinoma papilar de tiroides. Las metástasis intratiroideas, menos frecuentes, representan un 7,5% de los casos y se originan principalmente en tumores primarios de riñón, pulmón, cabeza y cuello, y mama. Se describe el caso de una mujer de 64 años que presentó un nódulo tiroideo de rápido crecimiento, cuyo origen primario o metastásico no estaba claro, en el cual la 18F-FDG PET/TC fue útil en la aproximación diagnóstica y en el manejo clínico de la paciente. El posterior análisis por anatomía patológica de la lesión confirmó el diagnóstico de metástasis de leiomiosarcoma uterino.

Palabras clave:
PET/TC
Tiroides
Sarcoma
Útero
Leiomiosarcoma

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