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Histopathological staining of fine needle aspiration biopsy for nodules in lung and liver (original magnification 100×). The inset shows positive immunostaining for hepatocytes of the lung nodule biopsy. Immunostaining for both specimens indicated hepatocytes (+), α-fetoprotein (AFP) (+), thyroid transcription factor 1 (TTF-1) (−) and surfactant protein A (SPA) (−) (data not shown). HEP: hepatocyte.
