Figure 3

Fragment of the tumour showing transition between hypertrophied mucosa and glandular proliferation (asterisk) lined by stratified squamous (arrows) and ciliated respiratory epithelium (arrowheads), respectively. HE staining.
Fragment of the tumour showing transition between hypertrophied mucosa and glandular proliferation (asterisk) lined by stratified squamous (arrows) and ciliated respiratory epithelium (arrowheads), respectively. HE staining.