Pap stained image showing benign bronchial epithelial cells, macrophages and fibromyxoid matrix.
Pap stained image showing benign bronchial epithelial cells and mature cartilage.
Features
Presentation
• Most common benign tumor of the lung
• Presentation: typically solitary, peripheral, and well circumscribed (coin-lesion)
Cellular Features
• Benign respiratory epithelium (ciliated, metaplastic)
• Alveolar macrophages
• Other mesenchymal elements: adipose tissue, smooth muscle, spindle cells
Background
• Mature cartilage or immature fibromyxoid material
Reference
Dunbar F et al. Diagn Cytopathol. 1989;5(2):174-80.