Fig. 3
A. The stroma of pulmonary hamartomas with PT contained fibroadipose tissue, blood vessels and many inflammatory cells including the lymphocytes and macrophage, all diffusely dispersed (H&E, x100). B. Prominent epithelial foldings formed the papillary projections and myxoid stroma with vessels in villus-like structure (H&E, x100). C. Epithelial and chondroid components with dense lymphocytic inflammation (H&E, x100). D. Non-ciliated and ciliated columnar epithelial lining of immature placental villi (H&E, x200)