Abstract:
Back ground:- Oral and maxillofacial region includes nasal cavity, sinuses, the lips, oral
cavity, maxilla, mandible and the major and minor salivary glands with the overlying skin and
soft tissues. This area is common site for different lesions, including the inflammatory and
neoplastic lesions. Neoplastic tumors, in the area, account 5% of all human Neoplasia. The
distribution of these tumors changes with the socio-demographic change throughout the world
and is not well studied on the study area.
The objective:- of this study was to assess the histopathologic patterns of oral and
maxillofacial masses among patients attending histopathology unit of pathology department in
Jimma medical center from September 11, 2013 to September 10, 2018.
Methods:- A Retrospective cross sectional study was conducted. 377 OMF mass samples
fulfilling the inclusion criteria were included in the study. Data was collected by structured check
list and the data was interred into Epi-data version 3.1 and transferred to SPSS version 22 for
analysis. The study was conducted from May 1, 2019 to August 30, 2019 GC.
Result:- the age distribution of OMF masses are with Minimum age value of 1 year and
maximum value of 85 years and median age is 30years.From 377 patient 194 (51.5%) were male
while 183(48.5) were female with a ratio of M:F=1.06:1 showing increased male dominance.
Mesenchymal tumours, other than bone tumor, have the highest number of 128 (33.9%) cases
followed by surface epithelial tumors, 75(19.9%), Odontogenic tumors 20(5.3%), salivary gland
tumors 55(14.6%), benign cystic mass 47(12.5%), inflammatory masses 42(10.9%) and the least
numbers of OMF biopsy was bone tumor with 11(2.9%) cases. From the benign tumors
fibroepithelial tumor 53(22.8%) is the commonest. From the malignant tumors and from
carcinoma, squamous cell carcinoma 56(57.1%), is the leading. From sarcomas Osteosarcoma
8(8.2%) is the commonest one.
Conclusion:-The result of this research shows the distribution of oral and maxillofacial tumors
varies with the age, sex and anatomic site of the patients. OMF mass is common on the early
adult age period and the risk of malignant tumors increases in those with age ≥ 41years and the
commonest malignant tumor is squamous cell carcinoma but in children and adolescents benign
tumors specially fibroepithelial polyps are the commonest with male predominance.
