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Rev. esp. patol ; 41(3): 233-236, jul.-sept. 2008. ilus
Article in Spanish | IBECS | ID: ibc-76729

ABSTRACT

Caso clínico: Los autores presentan un sarcoma de partesblandas cervicales que por su forma de presentación clínica,localización yuxtatiroidea y aspecto histológico simulabaun tumor maligno de glándula tiroides. Resultados:Aunque la histología podía ser compatible con varias formasde carcinoma tiroideo, especialmente con un carcinomamedular, los resultados del estudio inmunohistoquímico ylas alteraciones moleculares del gen EWS mediante FISHen parafina correspondieron a un tumor maligno de célulasredondas de estirpe mesenquimal, concordante con sarcomade Ewing/ PNET. Conclusión: Este caso, de gran dificultaddiagnóstica, sirve para recordar que en el diagnóstico diferencialde tumores tiroideos pobremente diferenciadoshemos de considerar la posibilidad de afectación secundariadel mismo por tumores de estructuras vecinas, ya que lossarcomas primarios de la glándula tiroides son muy infrecuentesy en su mayoría corresponden a formas sarcomatoidesde carcinomas tiroideos (AU)


Case report:We report a case of cervical soft tissue sarcomasimulating primary malignant thyroid neoplasm dueto its location, histopathology and clinical presentation.Results: Although histopathology was consistent with severalforms of thyroid carcinoma, most of all, medullary carcinoma,immunohistochemical analysis and moleculargenetic studies on EWS gene, using FISH on paraffinembeddedtissue, yielded the diagnosis of mesenquimalmalignant round cell tumor consistent with Ewing’s sarcoma/PNET. Conclusion: The message of this difficult case isthat differential diagnosis of poorly differenciated thyroidtumors must include the possibility of secondary involvementfrom neighbouring cervical structures because primarythyroid sarcomas are much less frequent than sarcomatoidvariants of primary thyroid carcinomas (AU)


Subject(s)
Humans , Female , Adult , Sarcoma, Ewing/diagnosis , Sarcoma, Ewing/pathology , Thyroid Neoplasms/diagnosis , Thyroid Neoplasms/pathology , Diagnosis, Differential , Immunohistochemistry , Sarcoma, Ewing/surgery , Thyroid Neoplasms/surgery
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