ABSTRACT
After plasma cell neoplasia, osteosarcoma is the most common primary bone tumor which accounts for 20% of all sarcomas. A malignant tumor is characterized by the formation of bone or osteoid by tumor cells. Long bones are the most common site of involvement. In the jaw bones, approximately 5% of involvement with an incidence of 1 in 1.5 million persons per year. It develops in a broad range of ages but is more common in the third and fourth decades, slightly more often in the mandible than in the maxilla. In this case report, a 24-year-old male patient reported a mass in the left mandible for the past 1 week which appeared after the third molar extraction. In the orthopantomogram, a loss of lamina dura and a change in the trabecular pattern was noted. Histopathological findings were suggestive of osteoblastic osteogenic sarcoma. The patient underwent a hemi-mandibulectomy followed by chemotherapy. The main aim of this case report was to focus on the importance of early diagnosis of this tumor based on clinical and radiographic examinations, particularly taking into account the fast progression and aggressiveness of this neoplasm.
ABSTRACT
Introduction Odontogenic infections are one of the common causes of maxillary sinusitis. With the close proximity of the roots of maxillary posterior teeth to the sinus floor, the infection may spread into the sinus causing sinus mucosal thickening. This study aims to evaluate the association between maxillary posterior teeth periapical pathologies and maxillary sinus mucosal changes using cone-beam computed tomography (CBCT) images. Methods One-hundred six maxillary posterior teeth with periapical lesions were included in this study and were assessed using CBCT images by two maxillofacial radiologists. The proximity of the roots to the sinus floor, the proximity of the top edge of the periapical lesion to the sinus floor, and the sinus mucosal changes associated with the periapical lesions were studied. The size of the periapical lesion was measured and scored using CBCT periapical index. Mucosal thickening more than 2 mm was considered pathological and the type, pattern, and severity of mucosal thickening were assessed. Data were analyzed using chi-squared tests at a level of significance set at p -value less than 0.05. Results Among the 106 teeth with periapical lesions, 99 teeth (93.4%) revealed the presence of maxillary sinus mucosal thickening. The prevalence of mucosal thickening increased significantly with the presence of cortical bone destruction, the close proximity of the root, and the periapical lesion to the sinus floor. The generalized type of mucosal thickening was more prevalent with larger periapical lesions and a significant increase in the severity of the thickening was observed closer spatial relationship of the root to the sinus floor. Conclusion Periapical pathologies of maxillary posterior teeth often cause sinus mucosal thickening. The early diagnosis and management of these pathologies will be helpful in preventing the spread of infection into the maxillary sinus.
ABSTRACT
A herniation is the abnormal protrusion of an organ or other body structure through a defect or natural opening in a covering membrane, muscle, or bone. The parotid gland is the largest of the salivary glands, which is situated below the external acoustic meatus and overlaps the masseter muscle anteriorly. In this rare case report, a 35 years old female patient complained of pain in the cheek region for 3 years and gave a history of pain aggravating while having sour food. On palpation, multiple nodules were found bilaterally in the cheek area which was tender. Ultrasonography of the masseter and parotid region showed herniation of the lower lobe of the parotid gland into the masseter muscle which is 1 cm on the right side and 0.8 cm on the left side. The findings obtained from ultrasound images were further confirmed with Magnetic Resonance Imaging (MRI).