KRAS mutation-positive bronchial surface epithelium (BSE)-type lung adenocarcinoma with strong expression of TTF-1: a case providing a further insight as for the role of TTF-1 in the oncogenesis.

Abstract

Bronchial surface epithelium (BSE)-type lung adenocarcinoma is a subtype of non-terminal respiratory unit (TRU)-type lung adenocarcinoma originating in the bronchial surface epithelium. However, there are few known cases of BSE-type adenocarcinoma with marked expression of thyroid transcription factor-1 (TTF-1). This paper describes a very rare case of KRAS… (More)

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