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Pediatr Dev Pathol. 2004 Jul-Aug;7(4):380-4. Epub 2004 Jul 15.

Separate occurrence of extra-adrenal paraganglioma and gastrointestinal stromal tumor in monozygotic twins: probable familial Carney syndrome.

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Department of Pathology, University School of Medicine of Paris VI and Hôpital d'Enfants Armand Trousseau Assistance Publique--Hôpitaux de Paris, 26 avenue du Docteur Arnold Netter, 75571, Paris cedex 12, France.


The nonfamilial Carney triad includes paraganglioma, gastrointestinal stromal tumor (GIST), and pulmonary chondroma. Some paraganglioma-GIST diads are familial and inherited in an apparent autosomal dominant manner. The familial paraganglioma-GIST syndrome differs from the Carney triad by the absence of female predilection and predominance of paragangliomas. We report the cases of a 12-year-old boy with a paraganglioma of the organ of Zuckerkandl, and his 13-year-old monozygotic twin with a gastric GIST. These two patients, to our knowledge, are the first to be reported as likely having the familial paraganglioma-GIST syndrome following its description by Carney and Stratakis (Am J Med Genet 2002;108:132-139) in 12 patients from five families. A lifetime follow-up and a periodic search for both tumors are indicated in these patients and their families.

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