Association of podoplanin expression to histopathological grades of oral epithelial dysplasia and oral squamous cell carcinoma.

Objective: To determine the expression of podoplanin, and to correlate it with histopathological grades in oral epithelial dysplasia and oral squamous cell carcinoma cases. METHODS: The retrospective, analytical, cross-sectional study was conducted at the City Laboratory, Peshawar, Pakistan, and comprised specimen block data of histologically diagnosed cases of oral benign lesions, dysplastic lesions and oral squamous cell carcinoma from January 2017 to August 2021. Two sections (4um) were cut from each specimen block for Haematoxylin and Eosin staining and immunohistochemistry. The slides were re-evaluated by two pathologists for confirmation of the diagnosis, and podoplanin marker was applied to cases selected using immunohistochemistry. Data was analysed using SPSS 22. RESULTS: Of the 80 cases identified, 68(85%) were analysed. There were 20(29.4%) benign cases; 11(55%) females and 9(45%) males with mean age 39.90±16.23 years, 20(29.4%) oral dysplastic cases; 14(70%) males and 6(30%) females with mean age 57.75±12.02 years, and 28(41.2%) oral squamous cell carcinoma cases; 17(61%) males and 11(39%) females with mean age 50.55±14.80 years. Podoplanin expression in oral epithelial dysplasia cases was significant (p=0.028), while it was not significant in the other 2 groups (p>0.05). CONCLUSIONS: Podoplanin when used along with histopathological evaluation could aid as an adjuvant technique in the diagnosis and grading of oral epithelial dysplasia.

First comprehensive report on distribution of histologically confirmed oral and maxillofacial pathologies; a nine-year retrospective study.

OBJECTIVE: To report the distribution of oral and maxillofacial pathologies diagnosed histologically in laboratory. METHODS: The retrospective descriptive cross-sectional study was conducted at Rehman Medical Institute, Peshawar, Pakistan, and comprised biopsied lesions submitted to the institutional laboratory from 2010 to 2019. Data on gender, age, site of the lesion and histopathological diagnosis was retrieved from the records. Data was analysed using Microsoft Excel. RESULTS: Of the 986 histologically confirmed cases, 545(55.27%) related to males and 441(44.72%) to females. The overall mean age of the patients was 43.20±19.85. Tongue was the most affected site 159(16.1%). The most common diagnostic category was malignant tumours 338(34%), followed by salivary gland pathology 162(16%), and cysts and odontogenic tumours 138(14%). The most common histopathological finding was oral squamous cell carcinoma 249(25.2%), and pleomorphic adenoma was the most common benign tumour 103(10.4%). CONCLUSIONS: Oral squamous cell carcinoma was the most common malignancy, while pleomorphic adenoma was the most common benign tumour.