moderate chronic inflammatory infiltrate: APS 5%, APINC 35%
The differences in the type and prevalence of glands found in the lamina propria of the APS and APINC ([c.
equal number of serous and mucous glands: APS 0%, APINC 5%
We endeavored to identify the primary differences and similarities with regard to the constitution of the APS and APINC.
Stratified squamous epithelium (keratinized and nonkeratinized combined) was significantly more prevalent in the APS (55%) than in the APINC (5%); stratified squamous keratinized epithelium was present only in the APS.
The presence of epithelia other than respiratory epithelium in the APS and APINC has also been observed by other authors.
Conversely, we found a high degree of thickness in 65% of the APINC samples, which was similar to the high amount of respiratory epithelium found in that region (50%).
6,11] There was a high degree of thickness in the APINC, which not only has a greater amount of respiratory epithelium, but is also less adaptable to external agents.
We studied the lamina propria to compare the types of inflammatory infiltrate and the types of glands in the APS and APINC.
Although the mucosa of the APINC had a higher degree of basement membrane thickness than did the mucosa of the APS, it also had a higher incidence of moderate inflammation.