A rare case of papillary pneumocytoma of the lung is reported. The immunohistochemical positivities for EMA, cytokeratin and TTF-l strongly support the hypothesis that the neoplastic cells are originated from type 2 pneumocytes. The tumour also presented areas displaying stroma of non-specific mixoid appereance, simulating a benign tumour of the salivary gland type. We propose that these mixoid areas constitute structures of metaplastic origin.

Papillary pneumocytoma of the lung simulating adenoma

BALDI, Alfonso;SANTINI, Mario;VICIDOMINI, Giovanni;COSTANZO, Rosaria Maria Anna;
2002

Abstract

A rare case of papillary pneumocytoma of the lung is reported. The immunohistochemical positivities for EMA, cytokeratin and TTF-l strongly support the hypothesis that the neoplastic cells are originated from type 2 pneumocytes. The tumour also presented areas displaying stroma of non-specific mixoid appereance, simulating a benign tumour of the salivary gland type. We propose that these mixoid areas constitute structures of metaplastic origin.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11591/235884
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