Objectives: To determine the relationship of Naswar with different tumour grading in squamous cell carcinoma. Study Design: Comparative cross-sectional study using non-probability, consecutive sampling. Setting: Department of Oral Pathology, Rehman College of Dentistry, Peshawar, Khyber Pakhtunkhwa, Pakistan. Period: January 2017 till June 2017. Material & Methods: 60 cases of oral squamous cell carcinoma were included. Half the cases (30) had a history of Naswar use while the other half (30) had no history of Naswar use. Data was analysed using SPSS v 22. Results: This study included 60% male and 40% female cases, ranging from 40 years to 80 years (mean = 57.6 + 11 years). Majority of patients 80% had well differentiated squamous cell carcinoma, while the rest (20%) had poorly differentiated. Distribution of male and female across both groups was equal (p 0.598). Both the groups were comparable in terms of grade of tumour (p 0.519). Conclusion: Naswar use was not associated with any particular histological grade of oral squamous cell carcinoma in our study. However, further research is needed to explore this association.

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%). Conclusion: Oral squamous cell carcinoma was the most common malignancy, while pleomorphic adenoma was the most common benign tumour. Key Words: Oral and maxillofacial lesions, Prevalence, Histopathology, Benign lesions, Malignant lesions.