Aneurysmal bone cyst of the temporal bone: MR findings.

MR findings in a case of aneurysmal bone cyst of the temporal bone are described. MR can suggest the diagnosis of aneurysmal bone cyst and also give ancillary information that is helpful for surgical treatment.     

Primary and secondary aneurysmal bone cyst: a radiological study of 75 cases

Radiological findings in 75 cases of aneurysmal bone cyst were analyzed. Sixty-five per cent were primary or simple and 35% were secondary, the aneurysmal bone cyst being combined with other osseous lesions. A primary aneurysmal bone cyst can be diagnosed with a high degree of certainty, but only 20% of secondary forms had the radiological appearance of aneurysmal bone cyst; in the other 80% the associated lesion dominated the radiological picture, particularly when it was malignant. In the secondary form a small biopsy specimen may show the features of aneurysmal bone cyst only; without radiological assistance a concomitant malignant lesion may be missed. Therefore, there must be close collaboration between the radiologist and and the pathologist.     

原发性与继发性动脉瘤样骨囊肿CT表现

目的评价CT对诊断与鉴别原发性与继发性动脉瘤样骨囊肿的价值。方法回顾性分析9例经手术病理证实原发性与继发性动脉瘤样骨囊肿的CT征象,并进行献复习。结果9例患中骨皮质缺损征象出现率(67％)高于“液一液平面”出现率(44％)。继发性动脉瘤样骨囊肿骨嵴明显粗大,可构成分房。9例病灶内呈不均匀软组织密度,增强后强化明显。结论CT检查有助于动脉瘤样骨囊肿早期定性诊断,并有助于鉴别原发性与继发性病灶。     

动脉瘤样骨囊肿的CT及MRI诊断(附21例报告)

目的分析动脉瘤样骨囊肿的CT及MR I表现,评价其影像学诊断价值。方法回顾分析21例经手术或穿刺证实的动脉瘤样骨囊肿的CT及MR I表现。结果病变在CT上有16例可见明显液-液平面,其上缘CT值低于下部,其中继发性动脉瘤样骨囊肿可见明显软组织肿块,而MR I图像上除1例继发性动脉瘤样骨囊肿未见明显液-液平面以外,其它20例均有明显液-液平面。且继发性动脉瘤样骨囊肿的软组织肿块显示得更加清楚。结论动脉瘤样骨囊肿大部分病例在CT和MR I上出现有液-液平面,具有一定特征性,但不是惟一性。     

Aneurysmal bone cyst of the orbit

Aneurysmal bone cysts of the skull are rare, and orbital involvement of these cysts is even less frequent. We present CT, MR imaging, and histopathologic findings of an aneurysmal bone cyst of the orbit in a 13-year-old female adolescent. The tumor mainly involved the frontal bone. MR imaging findings of the aneurysmal bone cyst of the skull were highly suggestive of the diagnosis.     

Aneurysmal bone cyst of the orbit with unusual angiographic features.

A 14 month old boy with sudden onset of proptosis of the left eye due to an aneurysmal bone cyst of the orbit is reported. Sequential plain films of the orbital region demonstrated changes ranging from subtle loss of bone definition of the orbital margin to the characteristic appearance of an aneurysmal bone cyst twelve months later. Arteriography at the time of the initial evaluation demonstrated prolonged retention of the contrast medium which we believe represents changes secondary to the number of giant cells present in the tumor rather than the relative vascularity of the lesion. While aneurysmal bone cyst of the orbit is extremely rare, it should be included in the differential diagnosis of proptosis in the pediatric age group.     

Chondroblastoma of the patella with a secondary aneurysmal bone cyst

A case of chondroblastoma of the patella combined with an aneurysmal bone cyst is presented. Chondroblastoma of the patella is an uncommon, benign neoplasm. On the other hand, secondary aneurysmal bone cyst is frequently associated with giant cell tumour of chondroblastoma. Received 15 July 1997; Revision received 6 November 1997; Accepted 13 November 1997     

Case report 748

A case of chondroblastoma associated with an aneurysmal bone cyst has been described. The radiographic appearance of the lesion understandably reflects the combined features of both tumors. Up to one-half of all cases of aneurysmal bone cysts are found in association with other tumors, benign or malignant, and up to 15% of chondroblastomas are combined with an aneurysmal bone cyst (4).     

Treatment of an aneurysmal bone cyst of the spine by radionuclide ablation

We report the nonoperative treatment of a recurrent, multilevel spinal aneurysmal bone cyst by injection of 32P chromic phosphate colloid into the cyst. The patient was then followed up with serial CT examinations, which showed stabilization and progressive ossification within the lesion. The rationale, alternatives, and possible contraindications to radionuclide ablation of spinal aneurysmal bone cysts are discussed.     

Computed tomography of aneurysmal bone cyst of the L1 vertebral body

A 31-year-old woman with an aneurysmal bone cyst of the L1 vertebral body proved by biopsy and studied by plain lumbar spine roentgenography, radionuclide studies, myelography, and CT is presented. The unusual location of involvement of the vertebral body alone and the difficulty in differential diagnosis between aneurysmal bone cyst and benign giant cell tumor are discussed.     

A case of aneurysmal bone cyst in father and son

The authors report a familial case of primary aneurysmal bone cyst in father and son, affecting both at the same location at nearly the same age. This fact again raises the speculation of a genetic link as another factor in the pathogenesis of aneurysmal bone cyst.     

Juxtaepiphyseal aneurysmal bone cyst

Nine cases of aneurysmal bone cyst arising in juxtaepiphyseal locations with gross invasion of the adjacent growth plate are reported. In five of these patients an abnormality of growth, due to premature fusion of the affected growth plate, ultimately developed. Treatment of these lesions should attempt to avoid this complication, which appears to be more common than has been appeaciated in the past. These nine cases represent 23% of 39 cases of aneurysmal bone cyst occurring in a long bone adjacent to an open epiphyseal plate. This series was extrapolated from a total of 198 cases of aneurysmal bone cyst in the files of the Istituto Ortopedico Rizzoli, Bologna, Italy.     

Biopsy proven eradication of an aneurysmal bone cyst treated by superselective embolization: A case report

A large aneurysmal bone cyst of the upper tibia in a 17-year-old patient was treated by superselective embolization with excellent clinical and radiological results. Extensive curettage and detailed pathologic analysis performed 2 years following embolization revealed only healing bone. The presented case and reviewed cases in the literature indicate that embolization is a promising method for definitive therapy of the aneurysmal bone cyst.     

Regression of aneurysmal bone cyst following open biopsy

Aneurysmal bone cysts are well described but relatively rare bone lesions. Histological diagnosis is usually obtained before definitive treatment. We report a patient with aneurysmal bone cyst regression after excisional biopsy and prior to preoperative embolization. This was also a patient with the William syndrome. This has not previously been reported, nor is there any known association between aneurysmal bone cyst and the William syndrome.     

髋周骨肿瘤及肿瘤样病变影像学诊断

目的评价髋周骨肿瘤及肿瘤样病变的影像学表现。资料与方法回顾性分析82例经穿刺活检或手术病理证实的髋周骨肿瘤及肿瘤样病变的影像学表现。全部病例均行X线平片检查,42例行CT检查,24例行MRI检查。结果骨囊肿13例,动脉瘤样骨囊肿16例,骨巨细胞瘤6例,软骨母细胞瘤2例(合并动脉瘤样骨囊肿1例),骨母细胞瘤1例,骨样骨瘤3例,骨化性纤维瘤2例,非骨化性纤维瘤3例,骨纤维异常增殖症6例,嗜酸性肉芽肿3例,骨肉瘤4例,软骨肉瘤3例,恶性骨母细胞瘤1例,淋巴瘤2例,转移瘤17例。良性骨肿瘤17例(占20.7%),肿瘤样病变38例(占46.4%),原发恶性骨肿瘤10例(占12.2%),转移瘤17例(占20.7%)。结论髋周是良性骨肿瘤及肿瘤样病变的好发部位,X线平片+CT或X线平片+MRI是较好的综合检查手段。     

Fatal ethibloc embolization of vertebrobasilar system following percutaneous injection into aneurysmal bone cyst of the second cervical vertebra

A 4-year-old boy developed progressive neck pain and an expansile osteogenic lesion of C2; the diagnosis was an aneurysmal bone cyst. An image-guided biopsy with 3D CT planning was performed followed by Ethibloc injection into the aneurysmal bone cyst. Subsequent CT and MR images demonstrated embolization material in the vertebrobasilar system, and the patient died of brain stem and cerebellar infarction 23 hours after the intervention. The course of events and technical considerations are discussed.     

颅骨动脉瘤样骨囊肿的影像学表现

目的：探讨颅骨动脉瘤样骨囊肿的影像学表现，提高对颅骨动脉瘤样骨囊肿的认识。资料与方法：搜集经手术病理证实的4例颅骨动脉瘤样骨囊肿，全部病例均作了CT平扫与MRI检查，其中1例摄有颅骨平片，1例MR／增强扫描，1例DSA检查。结果：4例颅骨动脉瘤样骨囊肿中，1例位于左蝶骨嵴和左眶骨处，2例位于左颞骨。1例位于右额骨。CT上均表现为不同程度的膨胀性吹气球样溶骨破坏区，密度不均匀；MRI示有出血、囊变及液面，T1WI和R2WI上呈混杂信号，1例增强后示肿瘤实质和邻近脑膜强化；血管造影示血管有推移改变。结论：颅骨动脉瘤样骨囊肿的影像学表现有一定的特征性，CT与MRI相结合能提示诊断，并有助于评价周围结构。     

Diagnosis of aneurysmal bone cyst of the mandible. A report of two cases with emphasis on scintigraphic approaches

Aneurysmal bone cyst is rarely found in the mandible, and roentgenographic diagnosis of this condition is not easily made. In this report, the diagnostic value of bone scintigraphy and radionuclide angiography and CT imaging in two cases of aneurysmal bone cyst of the mandible are discussed. Bone scintigraphy with Tc-99m MDP demonstrated ring-like or doughnut-pattern accumulation of radioactivity, which corresponded to the expansile character of the bony lesion. The accumulation of radioactivity was intensive in the peripheral region despite the fact that the lesion was benign. Furthermore, the central rarefaction showed that the lesion was cystic. Radionuclide angiography with Tc-99m HSA, including blood pool scan, did not detect radioactive concentration. Thus bone scintigraphy and radionuclide angiography were found to be essential in the differential diagnosis of aneurysmal bone cyst from other forms of tumor, especially hypervascularized tumor and central hemangioma of the mandible.     

Intracortical and subperiosteal aneurysmal bone cysts: a report of three cases

 Aneurysmal bone cyst of the long bones in a purely intracortical or subperiosteal location is unusual. Three such cases are reported, and the radiographic and pathologic differential diagnoses are discussed.Those subperiosteal or intracortical aneurysmal bone cysts with radiographic features similar to the intramedullary variety should suggest the same diagnosis. However, the radiographic features may be less specific, so that a diagnosis of aneurysmal bone cyst must be entertained when considering a subperiosteal or intracortical lytic lesion.     

血管异常扩张性骨囊肿——对动脉瘤样骨囊肿命名及归属的商榷

本文报告11例血管异常扩张性骨囊肿,其病理特点是静脉动脉异常扩张引起的骨膨胀,原命名为动脉瘤样骨囊肿并不符合其病理改变。并对其归属及分类进行了讨论。