Osteoma of soft parts

Osteomas of soft tissue are rare tumors. All previously reported cases occurred in the head, usually in the posterior tongue. We present two patients with soft-tissue osteomas in the thigh. Both masses were densely ossified and consisted of mature trabecular bone on computed tomography and magnetic resonance examination. Increased uptake of boneseeking radiopharmaceutical was found on scintigraphy. Histologically, mature lamellar bone was seen with small amounts of cartilage seen in the periphery. Symptoms of mass effect which resolved following surgery were noted. We believe that this previously unrecognized soft-tissue appendicular neoplasm lies at the end of a spectrum of post-traumatic ossifying lesions which includes soft-tissue chondromas and osteochondromas, as well as myositis ossificans.Supported in part by VA grant no. SA 306     

Gardner's Syndrome revisited: a clinical case and overview of the literature

Gardner's syndrome (GS), a variant of familial adenomatous polyposis (FAP), remains a life-threatening condition of significant dental relevance. Clinicians can play an important role in the identification of this condition as the dental manifestations often precede the development of intestinal polyposis. This article describes a clinical case in which identification of the dental features of GS during routine orthodontic assessment resulted in the early diagnosis of this condition, which was previously unrecognised in a young female patient.     

Removal of multiple osteomas by a modified combination technique using CO2 laser and curettage

The removal of multiple osteomas, especially on the forehead, can be a difficult and time consuming procedure, which can be complicated by bleeding because the region is well vascularized. We describe a quick and simple method to remove multiple osteomas by “decapping” the overlying tissue with a CO₂ laser and removing the osteomas with a cup curette to give good cosmetic results and a high level of patient satisfaction. As an improvement of previously described methods, we suggest that the laser beam is applied to the osteomas slightly off center in order to facilitate mechanical extraction with the curette through as small a hole as possible.     

CT引导下经皮穿刺射频消融术治疗骨样骨瘤及术后影像学评价

目的探讨CT引导下经皮穿刺射频消融术（RFA）治疗骨样骨瘤及影像学评价的临床应用价值。 方法应用CT引导下RFA治疗37例骨样骨瘤患者,肿瘤主要发生于股骨和胫骨,患者均表现为局部疼痛症状（34例患者疼痛位于病灶部位,3例位于病灶远侧的关节区域）,其中32例夜间加剧。术后1周,第1、3个月行CT和（或）MRI检查,观察射频消融区域的密度、信号改变及邻近组织恢复情况,结合疼痛视觉模拟评分（VAS）评价手术短期疗效。 结果37例患者手术均成功,术后2d～l周内均能恢复日常活动,无肢体功能障碍,术中、术后均未发生严重并发症。术后1个月射频区域CT表现为低密度的骨质缺损,3个月骨质缺损范围缩小,外周增厚的反应骨稍变薄。术后1周37例患者射频区域MRI T2WI高信号较术前降低,T1WI呈低信号;1个月时,20例患者（54.1%）T2WI高信号较术后1周降低,T1WI低信号范围缩小,17例患者（45.9%）信号恢复正常;3个月时,10例患者（27.0%）T2WI高信号较术后1个月降低,T1WI低信号范围缩小,27例患者（73.0%）信号恢复正常。术后VAS评分较术前明显降低,差异均有统计学意义（P<0.05）。 结论CT引导下RFA治疗骨样骨瘤是一种安全、有效的微创方法,动态影像学随访对短期疗效评价具有十分重要的价值。     

基于数学形态学的骨肿瘤X光片的分割

采用数学形态学的方法，根据骨肿瘤的形态特征，适当选择结构元素，对骨肿瘤X光片进行灰度形态滤波，再通过阈值法获得肿瘤边界的二值图。最后利用二值形态运算进一步处理，便可得到封闭的骨肿瘤边界，从而将骨肿瘤与背景分离。     

骨肿瘤X光图像定量分析系统的研究

本文介绍了一种骨肿瘤Ｘ光图像的定量分析系统，对该系统采用的图像处理及模式识别方法作了简述，该系统不仅将骨肿瘤识别分类，进行横向分析，也将特征参数与随访结果结合进行纵向的分析比较，为医生提供了一种非侵入的，客观的和定量的骨肿瘤分析工具，可提高骨肿瘤临床诊断的有效性和准确性，从而使传统的Ｘ线成像设备升级为高一层的设备。