Evolution of a mural thrombus in false aneurysm: CT demonstration

A case of postoperative false aneurysm of the ascending aorta with serial CT and angiographic demonstration is described. Some considerations on the behavior of early thrombosis are discussed.     

小脑血管母细胞瘤的MRI诊断

目的:研究小脑血管母细胞瘤的MRI表现,并探讨其临床诊断价值.方法:搜集经MRI诊断及手术病理证实的小脑血管母细胞瘤37例,男性25例,女性12例,年龄8～62岁.所有病例均行MRI平扫和增强扫描,以及液体衰减反转恢复成像(FLAIR).结果:肿瘤的活性部分于FLAIR和T2WI呈高信号,增强后明显强化;T1WI肿瘤囊性部分呈均匀低信号、肿瘤壁结节呈稍低信号或等信号.MRI表现为囊壁结节型28例(75.7%),实质型5例(13.5%),囊旁结节型4例(10.8%).结论:小脑血管母细胞瘤发生部位、形态对诊断有一定价值,MRI是诊断小脑血管母细胞瘤的可靠方法,MRI增强扫描对小脑血管母细胞瘤的诊断具有重要的价值.     

血管母细胞瘤的CT、MRI表现

目的:探讨血管母细胞瘤的CT和MRI影像学特征。方法:回顾性分析37例血管母细胞瘤的CT和MRI表现,25例行CT平扫和增强扫描,其中2例行CTA三维重建。14例行MRI检查,其中2例作MRI平扫,12例作MRI平扫加增强,其中1例3D TOF MRA检查。结果:37例共43个病灶。35例单发病灶中,发生于小脑半球者23例,小脑蚓部9例,第四脑室1例,延髓背侧1例,左桥小脑角区1例。其中囊结节型29例,实质型3例,囊实型2例,单纯囊性1例。2例为多发病灶,均位于后颅窝,其中1例有6处病灶,实质型和囊结节型混合存在。CT平扫囊结节型肿瘤壁结节显示率仅为54.6%。增强扫描壁结节及实质型、囊实型肿瘤均明显均匀或不均匀强化;23.1%显示肿瘤周围有增粗迂曲的血管。CTA示肿瘤为富血管的团块。MRI平扫肿瘤壁结节显示率100%。肿瘤周围流空血管显示率达57.9%。与CT比较此两项指标差异有统计学意义。增强扫描示壁结节及实质型、囊实型肿瘤明显均匀或不均匀强化。MRA显示肿瘤区域丰富的紊乱血管。结论:CT、MRI可作为血管母细胞瘤的首选检查方法。     

小脑血管母细胞瘤的MRI表现及其病理探讨

目的 分析小脑血管母细胞瘤的MRI表现与病理特点,探讨二者之间的关系.方法 回顾性分析经手术病理证实的32例小脑血管母细胞瘤,探讨其MRI表现和病理特点.结果 MRI表现大囊小结节型21例,实质型9例,囊性型2例.T1 WI上肿瘤囊性部分呈均一低信号,实性部分或瘤结节呈稍低或等信号;T2WI及FLAIR上肿瘤囊性部分呈均一高信号,实性部分或瘤结节呈稍高信号;增强后实性部分或瘤结节明显强化.病理表现实性部分或瘤结节主要由基质细胞构成,囊性部分主要由毛细血管网构成.结论 小脑血管母细胞瘤具有典型的MRI表现,且与其病理基础密切相关.MRI是诊断小脑血管母细胞瘤的有效检查方法.     

Solid cerebellar hemangioblastoma with an evolving large cystic component

We present a case of solid cerebellar hemangioblastoma which subsequently developed a large cystic component. Received 29 April 1996; Revision received 11 September 1996; Accepted 18 October 1996     

Indium-111 pentetreotide uptake within cerebellar hemangioblastoma in von Hippel-lindau syndrome

A 38-year-old woman with known von Hippel-Lindau syndrome underwent In-111 pentetreotide (OctreoScan) scintigraphy to evaluate a suspected pancreatic neuroendocrine tumor. The patient had undergone surgical resection of a left adrenal pheochromocytoma and a large right cerebellar hemangioblastoma several years previously. Although there was no evidence for recurrence of pheochromocytoma and no uptake within the pancreatic lesion, there was focal tracer accumulation within the left cerebellar hemisphere. MR imaging of the brain confirmed the presence of recurrent hemangioblastoma in the left cerebellum.     

Successful removal of a cerebellar hemangioblastoma in a combat support hospital

The case of a 24-year-old male U.S. Marine Corps sergeant who presented with headache and ataxia to a combat support hospital (CSH) in Kuwait, during Operation Iraqi Freedom, is described. Imaging studies revealed a cystic brain neoplasm causing hydrocephalus and increased intracranial pressure. Because of the patient's deteriorating clinical condition and the high risk of further brain injury during a prolonged air evacuation flight, immediate surgery at the CSH was deemed the safest treatment option. The tumor was completely removed and the patient's symptoms resolved, allowing safe evacuation. A CSH is not intended to provide comprehensive neurosurgical capabilities and some equipment usually considered necessary to perform this surgery was unavailable, but field-expedient methods were devised to overcome these deficiencies. This is the first reported case of a brain tumor successfully removed in a CSH.     

Cystic renal cancers: CT characteristics

The preoperative distinction between renal cyst and tumor has long been a dilemma. A cystic renal adenocarcinoma may appear similar to a largely necrotic tumor or a cancer incorporated into a cyst or arising from a cyst wall. Overall, these cystic cancers present the same preoperative features. In our series of 15 cases, the characteristic pattern on computed tomography scans included size greater than or equal to 10 cm, localized thickening of cyst walls with contrast enhancement, and irregularly and poorly defined implantation in the kidney.     

Elastofibroma dorsi: CT demonstration

Elastofibroma dorsi is a pseudotumorous connective tissue mass that characteristically arises between the chest wall and the inferior angle of the scapula. Its long axis is typically craniocaudal. Two patients are illustrated, each presenting with a fixed subscapular mass. Computed tomography showed each mass as elongated, incompletely marginated, and of soft tissue density deep to the inferior angle of a scapula. The latissimus dorsi and an underlying layer of fat were posterolaterally elevated inferior to the tip of the scapula. After incisional biopsy excluded sarcoma, each mass was locally excised.     

Clivus fracture: CT demonstration

A transverse fracture of the clivus through the region of the fused sphenooccipital synchondrosis involving the carotid canals was studied by CT. The patient also had bilateral temporal bone fractures with otorrhea and a carotid cavernous fistula. The literature related to clivus fractures is reviewed.     

孤立性肺炎性结节的CT诊断

目的：研究孤立性肺炎性结节的CT表现。提高对该病的正确诊断率。方法：选择接受CT检查的孤立性肺炎性结节60例，27例抗炎治疗后病灶消失，15例经皮肺穿刺活检证实，18例手术证实。结果：（1）病灶部位；两下叶60%，上叶23.3%，中叶10%。（2）CT征象；形状不规则53.3%，圆形或类圆形46.7%；病灶边缘模糊45%，部分清楚，部分模糊16.7%，边界清楚38.3%；密度均匀58.3%，密度不均匀41.7%；与胸膜广泛粘连50%，条状或线状粘连11.7%。无胸膜改变38.3%。（3）经抗炎治疗证实的27例，15例治疗1-3周病灶吸收，12例治疗1个多月才吸收。结论：病灶边界模糊，形状不规则且长轴与肺段的走行一致，与胸膜广泛粘连对孤立性肺炎性结节的诊断很有价值。结节边界清楚应考虑到炎性假瘤；各种征象的综合分析对诊断很有帮助。在同一层面上，若纵隔窗较肺窗明显缩小多见于炎性结节。