Özet:

Squamous cell carcinoma accounts for more than 90 % of malignant tumours of the oral cavity. It is most likely to appear in males over the age of 40. Smoking, alcohol consumption, chronic irritation and poor oral hygiene are identified as the most common etiological factors. The first clinical sign is asymptomatic ulceration. The most frequent involved sites are tongue, followed by mouth floor, alveolar ridge, and hard palate. Retromolar trigone region involvement is rare. Retromolar trigoneis a region that triangulary shaped of which base of the trigone extends from distal surface of the last molar tooth to the posterior mandibular alveolus and the apex of trigone is maxillary alveoler tuberosity. The lateral border of this triangle is coronoid process, medial border is limited to the anterior tonsillar pillars. The carcinomas of this region are invaded to the mandibular periosteum because in retromolar trigone, mucous membrane is firmly connected to the ramus of mandible. In this case report; the clinical, radiological and pathological findings are presented of a 75-yearsold male patient that is diagnosed with squamous cell carcinoma which is widely involved and started with painless swelling in the retromolar trigone

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