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Table 1 Clinicopathological differential features of primary lung large cell neuroendocrine carcinoma and primary thymic large cell neuroendocrine carcinoma

From: Thymic large cell neuroendocrine carcinoma – a rare and aggressive tumor: a case report

 

Lung LCNEC

Thymic LCNEC

Association with tobacco smoking

Yes

No

Imaging

Peripheral tumor, rarely invading mediastinal structures

Anterior mediastinal tumor

Immunohistochemistry:

 CK7

+

 TTF-1

+

 PAX8

+

 CD117

+/−

+/−

  1. CK cytokeratin, LCNEC large cell neuroendocrine carcinoma, TTF-1 thyroid transcription factor-1, + usually positive, − usually negative