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.