■骨瘤是一种良性骨肿瘤,很少影响动物。这种肿瘤最常见的骨骼包括下颌骨,颌面部骨骼,还有鼻窦.明确的诊断基于病理发现,可以与其他骨病变区分。
■病人,一只5岁完整的雄性Mongrel犬表现出巨大的下颌肿块,左右下颌骨都有,导致牙齿咬合.进行了射线照相,并描绘了边界边界清晰的强烈肿块,正常和异常骨骼之间的短暂过渡区,和光滑的圆形不透射线的外观。根据细针抽吸的调查显示存在椭圆形至纺锤形细胞,恶性标准较差,脂肪细胞,反应性成骨细胞,和基于梭形细胞群的破骨细胞,退化的中性粒细胞数量少,细菌,和很少的巨噬细胞。然后,影像学评估和细胞学检查结果证实了骨瘤,并进行了手术治疗。进行了单侧下颌骨切除术,病变被送到组织病理学实验室。组织病理学评估显示骨细胞增殖,无恶性特征。成骨细胞也没有显示出支持骨瘤肿瘤的非典型增殖。
■尽管小动物的下颌和颌面骨切除具有不同的耐受性,该患者成为未来更好的营养和预防面部畸形和牙齿错合的手术候选人。骨瘤后的随访是检查肿块再生的最必要的术后治疗方法之一。本报告中有大量数据应将该肿瘤视为下颌骨肿瘤的可能鉴别诊断。
Osteoma is a benign bone tumor that rarely affects animals. The most common bones involved with this tumor included the mandible, maxillofacial bones, and nasal sinuses. Definitive diagnosis is based on pathology findings which allow for differentiation with other bone lesions.
The patient, a 5-year-old intact male Mongrel dog presented with a huge mandibular mass that involved both the right and left mandible, and led to dental occlusion. The radiography was performed and depicted the intense mass with a well-demarcated edge, a short transitional zone between normal and abnormal bone, and a smooth rounded radiopaque appearance. The investigation according to the fine needle aspiration showed the presence of oval to spindle shape cells with poorly malignancy criteria, fatty cells, reactive osteoblasts, and osteoclasts based on a population of spindle-shaped cells, and low numbers of degenerated neutrophils, bacteria, and few macrophages. Then, the radiographic assessments and cytology findings demonstrated the osteoma and were referred for surgical intervention. A unilateral mandibulectomy was performed, and the lesion was sent to the histopathology laboratory. The histopathology evaluation showed osteocyte proliferation without malignancy features. The osteoblast cells also showed no atypical proliferation that endorses the osteoma tumor.
Although mandibular and maxillofacial bone resection in small animals have different tolerations, this patient became a candidate for surgery for future better nutrition and prevention of facial deformity and dental malocclusion. Follow-up after osteoma is one of the most necessary post-operation treatments to check the regeneration of the mass. There are considerable data in this report that should regard this tumor as a possible differential diagnosis for mandibular tumors.