Threadlike secretion that crosses the bronchial lumen as if it indicated the area of irregular and mamelonated edema of the mucosa at hour 7: infiltrating carcinoma of the bronchial wall.

Threadlike secretion that crosses the bronchial lumen as if it indicated the area of irregular and mamelonated edema of the mucosa at hour 7: infiltrating carcinoma of the bronchial wall.