Missed diagnosis of primary intraosseous squamous cell carcinoma - A case report.

Odontogenic epithelial remains are the source of the uncommon malignant central jaw tumour known as primary intraosseous squamous cell carcinoma. Although both jaw bones may be affected, the mandible is typically affected. We describe a 40-year-old man who was first misdiagnosed with a periapical infection involving his lower left wisdom tooth. Two years later, the patient arrived at our outpatient department (OPD) with a significant swelling on the left side of the jaw. Advanced imaging and panoramic radiography showed a lesion with total erosion of the left ramus. The mandibular angle biopsy (Fine Needle Aspiration Cytology)) showed acute suppurative inflammation with a large number of giant cells.