Figure 2From: An unusual case of a microscopic alveolar adenoma coexisting with lung carcinoma: a case report and review of the literature Immunohistochemical staining showing positivity for (a) cytokeratin AE1/AE3 antibody (original magnification, 40×) and (b) thyroid transcription factor 1 (original magnification, 100×) in the epithelial cells lining the cysts.Back to article page