下颌骨良性骨母细胞瘤的临床与病理特点

Clinical and Pathological Character of Benign Osteblastoma in Mandible

良性骨母细胞瘤主要由骨母细胞、骨样组织、纤维结缔组织和骨组织所组成的十分少见的良性骨肿瘤，通常在临床上诊断很困难，误诊率高，往往需要术后病理诊断证实，本文报道的骨母细胞瘤均发生在下颌骨磨牙区，肿瘤为颗粒状或砂砾状，出血较多，这是此肿瘤的一个重要特征，手术切除不易复发．良性骨母细胞瘤发病部位多见于长骨，次为脊柱，发生在颌骨极为少见，好发生在青少年，肿瘤呈膨胀性生长，常伴有炎症表现，损伤可能是诱发骨肿瘤或刺激骨肿瘤增长的重要因素，其病理特征是：大量骨母细胞存在其基质内含有丰富的血管、骨样组织，纤维间质及不同程度的钙质沉着，Ｘ线表现为云雾状斑片状阴影为特征．

Benign osteoblastoma consists of osteoblast,ossiform tissue,fibroareolar and osseoustissue,which is formed rarely one of benign osseoustomas.In general,clinical diagnosis of benign osteoblastoma is very difficult and high misdiaenosis rate happened.It must be comfirmed at post-operationby pathologcal diaenosis.The osteoblastoma occurred in characteristic of osteoblastoma is particular and/or gravel shape,and more hemorrhage.It is rare recurrence after the tumor removed.The osteoblastoma is common to occur in the long bone and the spinal column,but rarely in the jow bone.Youngsters more easily suffer from this tumor. The tumor develops with expansion and inflamation.The injury might be an important factor that causesosserus tumor or stimulates the lesion developed.It is a pathological character that many osteoblasts exist in matrix with rich blood vessels and osserustissue and calcication deposited in the mesenchyme in different extent.The character of X-ray shows a shadow of cloudy and spot.Recently,there is no such report on the tumor deterioration.