Invasive Thymoma with Right Upper Lobe Endobronchial Lesion and Autoimmune Enteropathy

Figure 3

(a) High-magnification image showing a biphasic neoplasm composed of lymphocytes and epithelial cells. (b) Immunostaining for high molecular weight cytokeratin (CK5/6) highlighting the epithelial component. The lymphocytes are negative.

(a)

(b)