Fig. 1

Gross and histologic findings of bronchial hyalinizing clear cell carcinomas. The cut surfaces show well-demarcated lesions, creamy whitish (a, c), or whitish (e) in color. Tumor protrusion into the bronchi (b, d, arrow heads) is evident, with invasion of a peribronchial lymph node (f, arrow heads). Note the trabecular pattern (g), nest formation (k), and mixed features (i), with prominent hyalinized collagen. Predominant eosinophilic cells (h), clear cells (l), and their mixture (j) are evident in various proportions. (Hematoxylin and eosin staining. Scale bars are 10 mm in (a, c), and (e), 5 mm in (b, d), and (f), 100 µm in (g, i), and (k), and 50 µm in (h, j, and l).)