High‐resolution DNA content analysis of microbiopsy samples in oral lichen planus

• Published in: Oral diseases Vol. 23; no. 3; pp. 318 - 323
• Main Authors: Pentenero, M, Monticone, M, Marino, R, Aiello, C, Marchitto, G, Malacarne, D, Giaretti, W, Gandolfo, S, Castagnola, P
• Format: Journal Article
• Language: English
• Published: Denmark Wiley Subscription Services, Inc 01.04.2017
• Subjects: Adult; Aged; Aged, 80 and over; Aneuploidy; Biopsy; Content analysis; Dentistry; Deoxyribonucleic acid; DNA; DNA - analysis; DNA aneuploidy; DNA flow cytometry; Female; Flow cytometry; Fungal infections; Humans; Lichen Planus, Oral - genetics; Lichen Planus, Oral - pathology; Male; Middle Aged; Mouth Mucosa - chemistry; Mouth Mucosa - pathology; Oral cancer; oral lichen planus; Prospective Studies; oral lichen planus; DNA aneuploidy; DNA flow cytometry
• ISSN: 1354-523X; 1601-0825
• DOI: 10.1111/odi.12605

Objectives DNA aneuploidy has been reported to be a predictor of poor prognosis in both premalignant and malignant lesions. In oral lichen planus (OLP), this hypothesis remains to be proved. This study aimed to determine the rate of occurrence of DNA aneuploidy in patients with OLP by high‐resolution DNA flow cytometry. Methods Patients with OLP were consecutively enrolled. Tissue samples were subdivided for formalin fixation and routine histological assessment and for immediate storage at −20°C for later DNA ploidy analysis, which was performed by DAPI staining of the extracted nuclei and excitation with a UV lamp. The DNA aneuploid sublines were characterized by the DNA Index. Results A DNA aneuploid status was observed in two of 77 patients with OLP (2.6%). When considering the clinical aspect of the OLP lesions, both DNA aneuploid cases had a reticular clinical aspect. Conclusions DNA aneuploidy is an uncommon event in OLP and less frequent compared to other non‐dysplastic and non‐OLP oral potentially malignant disorders. The extremely low rate of DNA aneuploidy could represent an occasional finding or reflect the low rate of malignant transformation observed in patients with OLP even if the real prognostic value of DNA ploidy analysis in patients with OLP remains to be confirmed.