A Histomorphology Comparison of Saw-Tooth Shaped Rete Ridge Between Oral and Cutaneous Lichen Planus

Lichen planus is chronic and comparatively collective inflammatory mucocutaneous disease. The histopathological features of oral lichen planus were described as comparable to those of cutaneous lichen planus(CLP). Among those saw-toothed rete ridges are introduced as less important histopathologic features of idiopathic OLP in contrast to CLP. Accordingly, existing study aimed to estimate existence of saw tooth rete ridges in OLP in comparison to CLP.; In this retrospective cross-sectional study, 56; E stained slides with clinical and histopathological diagnoses of OLP were randomly collected from the archive of the oral pathology laboratory. CLP cases were selected randomly from a private pathology laboratory and were evaluated for the presence of saw-toothed rete ridges. Collected data were evaluated using Chi-square; Fishers exact test in SPSS 24 at an error level of 0.05%. Chi-square test did not show a substantial difference between oral; cutaneous groups in terms of the shape of the rete ridges (p = 0.511). Outcomes of existing study showed that saw tooth rete ridge was seen in OLP similar to CLP. Future studies concerning clinical subtype and type of keratosis are recommended.