{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T10:48:34Z","timestamp":1782211714723,"version":"3.54.5"},"reference-count":26,"publisher":"Termedia Sp. z.o.o.","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pol J Pathol"],"abstract":"<jats:p>Metastatic extra-adrenal paragangliomas are very rare and can represent diagnostic challenges. We report a case of 69-year-old man with a tumor of the right shoulder. Histologic and immunohistochemical examinations confirmed the diagnosis of paraganglioma. Surprisingly, tumor cells were diffusely thyroid transcription factor 1 (TTF-1) positive. Succinate dehydrogenase complex subunit B (SDHB) deficiency has not been detected. Inherited syndromes associated with paragangliomas were ruled out. The primary tumor was identified in the mediastinum. This is the first report of TTF-1 expression in paraganglioma. To avoid misdiagnosis, careful clinical and pathological examination of any tumor with organoid growths pattern is necessary.<\/jats:p>","DOI":"10.5114\/pjp.2017.73931","type":"journal-article","created":{"date-parts":[[2018,3,8]],"date-time":"2018-03-08T04:51:17Z","timestamp":1520484677000},"page":"354-358","source":"Crossref","is-referenced-by-count":0,"title":["Soft tissue metastasis of mediastinal non-functioning paraganglioma with unusual TTF-1 expression: a potential diagnostic pitfall"],"prefix":"10.5114","volume":"68","author":[{"given":"Michal","family":"Benej","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Iva","family":"Zambo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ondrej","family":"B\u00edlek","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ivan","family":"Capov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3061","published-online":{"date-parts":[[2018,3,6]]},"reference":[{"key":"ref-1701116","unstructured":"DeLellis RA, Lloyd RV, Heitz PU, Eng C. 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