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Papillary pneumocytoma of the lung simulating a pleomorphic adenoma
Alfonso Baldi1, Mario Santini, Giovanni Vicidomini
1Department of Biochemistry and Biophysic F. Cedrangolo, Section of Anatomic Pathology, Second University of Naples, Naples, Italy.
In Vivo (Athens, Greece)
|December 24, 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 appearance, simulating a benign tumour of the salivary gland type. We propose that these mixoid areas constitute structures of metaplastic origin.