Figure 5
A. Bronchial enchondroma grows along the bronchial walls, showing diffuse luminal narrowing and multifocally near obstruction (arrowheads).
B. Mature cartilage lobules of this bronchial enchondroma are peripherally encased by bone with endochondral ossification (arrows).
C. and D. Both components of the enchondroma are normal cancellous bone with fatty (C, star) hypercellular (D, star) marrows and mature hyaline cartilage lobules, with no other hamartomatous adipose tissue or smooth muscle components.