Dynamic magnetic resonance imaging features of cavernous hemangioma in the manubrium:A case report

BACKGROUND Osseous hemangiomas,especially those located in the manubrium,are rare benign tumors.In a review of the literature,only three case reports of sternal hemangioma were found.A precise diagnosis is difficult because of their nonspecific findings on computed tomography(CT)/magnetic resonance imaging(MRI).CASE SUMMARY An 88-year-old woman was suffering from a progressively enlarging mass in the manubrium.Chest CT images showed an osteolytic and expansile lesion with cortical destruction.Vascular malformation was suspected after CT-guided biopsy.On the dynamic MRI scans,the mass showed a bright signal on the T2-weighted image,peripheral nodular enhancement on the early-phase images and progressive centripetal fill-in on the delayed-phase images.Cavernous hemangioma was suspected preoperatively based on the MRI features and finally confirmed by histopathologic analysis.CONCLUSION This uncommon case demonstrates the possible characteristic features of manubrium cavernous hemangioma on dynamic MRI scans;knowledge about these features may prevent patients from developing catastrophic complications,such as rupture or internal hemorrhage,caused by biopsy or surgery.

Gd-EOB-DTPA-enhanced magnetic resonance imaging features of hepatic hemangioma compared with enhanced computed tomography

AIM:To clarify features of hepatic hemangiomas on gadolinium-ethoxybenzyl-diethylenetriaminpentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) compared with enhanced computed tomography (CT). METHODS:Twenty-six patients with 61 hepatic hem- angiomas who underwent both Gd-EOB-DTPA-enhanced MRI and enhanced CT were retrospectively reviewed. Hemangioma appearances (presence of peripheral nodular enhancement, central nodular enhancement, diffuse homogenous enhancement, and arterioportal shunt during the arterial phase, fill-in enhancement during the portal venous phase, and prolonged enhancement during the equilibrium phase) on Gd-EOB-DTPA-enhanced MRI and enhanced CT were evaluated.The degree of contrast enhancement at the enhancing portion within the hemangioma was visually assessed using a five-point scale during each phase. For quantitative analysis, the tumor-muscle signal intensity ratio (SIR), the liver-muscle SIR, and the attenuation value of the tumor and liver parenchyma were calculated. The McNemar test and the Wilcoxon's signed rank test were used to assess the significance of differences in the appearances of hemangiomas and in the visual grade of tumor contrast enhancement between Gd-EOB-DTPA-enhanced MRI and enhanced CT. RESULTS:There was no significant difference between Gd-EOB-DTPA-enhanced MRI and enhanced CT in the presence of peripheral nodular enhancement (85% vs 82%), central nodular enhancement (3% vs 3%), diffuse enhancement (11% vs 16%), or arterioportal shunt (23% vs 34%) during arterial phase, or fill-in enhancement (79% vs 80%) during portal venous phase. Prolonged enhancement during equilibrium phase was observed less frequently on Gd-EOB-DTPA-enhanced MRI than on enhanced CT (52% vs 100%, P < 0.001). On visual inspection, there was significantly less contrast enhancement of the enhancing portion on Gd-EOB-DTPA-enhanced MRI than on enhanced CT during the arterial (3.94 ± 0.98 vs 4.57 ± 0.64, respectively, P < 0.001), portal venous (3.72 ± 0.82 vs 4.36 ± 0.53, respectively, P < 0.001), and equilibrium phases (2.01 ± 0.95 vs 4.04 ± 0.51, respectively, P < 0.001). In the quantitative analysis, the tumor-muscle SIR and the liver-muscle SIR observed with Gd-EOB-DTPA-enhanced MRI were 0.80 ± 0.24 and 1.28 ± 0.33 precontrast, 1.92 ± 0.58 and 1.57 ± 0.55 during the arterial phase, 1.87 ± 0.44 and 1.73 ± 0.39 during the portal venous phase, 1.63 ± 0.41 and 1.78 ± 0.39 during the equilibrium phase, and 1.10 ± 0.43 and 1.92 ± 0.50 during the hepatobiliary phase, respectively. The attenuation values in the tumor and liver parenchyma observed with enhanced CT were 40.60 ± 8.78 and 53.78 ± 7.37 precontrast, 172.66 ± 73.89 and 92.76 ± 17.92 during the arterial phase, 152.76 ± 35.73 and 120.12 ± 18.02 during the portal venous phase, and 108.74 ± 18.70 and 89.04 ± 7.25 during the equilibrium phase, respectively. Hemangiomas demonstrated peak enhancement during the arterial phase, and both the SIR with Gd-EOB-DTPA-enhanced MRI and the attenuation value with enhanced CT decreased with time. The SIR of hemangiomas was lower than that of liver parenchyma during the equilibrium and hepatobiliary phases on Gd-EOB-DTPA-enhanced MRI. However, the attenuation of hemangiomas after contrast injection was higher than that of liver parenchyma during all phases of enhanced CT. CONCLUSION:Prolonged enhancement during the equilibrium phase was observed less frequently on Gd-EOB-DTPA-enhanced MRI than enhanced CT, which may exacerbate differentiating between hemangiomas and malignant tumors.

THE DIAGNOSIS OF MAGNETIC RESONANCE IMAGING FOR SPINAL CAVERNOUS ANGIOMAS

Objective To assess the characteristics of magnetic resonance imaging for spinal cavernous angiomas.Methods The examinations of plain scan and contrast enhanced scan of magnetic resonance were performed in three patients with spinal cavernous angiomas.Results The focus of two cases was located in thorax segment of the spinal cord and one in lower cervical segment.All focuses were single and the shape of spinal cord was normal or slightly thick. MRI characteristic of spinal cavernous angiomas was just like popcorn or mulberry with a jumbled gobbet signal. Low and short T 2 signal appeared around the focus. In all cases, there were no obvious contrast enhanced signal in 2 cases and one case with moderate contrast enhanced signal. The diameter of hemorrhage was smaller than that of the spinal cord.Conclusion MRI has higher sensitivity and specificity in the diagnosis of spinal cavernous angioma.

The Magnetic Resonance Image and Pathology of Spinal Cord Cavernous Hemangioma

Objective To investigate the characteristics of magnetic resonance image (MRI) of spinal cord cavernous hemangioma. Methods Six cases of spinal cord cavernous heman-gioma diagnosed by MRI and confirmed by pathology were reviewed. The characteristics of MRI were analyzed and correlated with pathological characteristics of spinal cord cavernous hemangioma. Results In 4 cases, the tumors were located in thoracic segment of the spinal cord and 2 in cervical cord. All lesions were solitary and the spinal cords were normal or a little thicker. The MRI showed that the images of focus were ball-like popcorn or mulberry with mixed signal,with short T2 signal around the focus. Under microscope, the hemangioma was composed of highly expanded blood sinusoids and its wall was thin and consisted of flat epithelial cells. There were some red blood cells in the cavity of the sinusoid and a little fibrous tissue in the diazoma between blood sinusoids. And also some fresh and old hemorrhages could be seen in the specimen. Conclusion MRI has high sensitivity and specificity in the diagnosis of spinal cavernous hemangioma.

Clinical-radiological-pathological correlation of cavernous sinus hemangioma: Incremental value of diffusion-weighted imaging

AIMTo elucidate the clinical, magnetic resonance imaging (MRI), pathological features of these lesions and asses the incremental value of diffusion-weighted imaging (DWI) in diagnosing them. METHODSFifteen consecutive patients (11 females and 4 males; mean age 40.93 years; age range 13-63 years) with cavernous sinus hemangiomas (CSH) who underwent examination between November 2008 and May 2016 were included for the analysis. MRI, clinical and surgical findings of each patient was retrospectively reviewed. DWI were also analysed and mean-apparent diffusion coefficient (ADC) value was calculated. Eleven patients underwent surgical removal of the lesion and 2 patients had biopsy only. Diagnosis of CSH was confirmed histologically in 13 patients. RESULTSEleven patients (73%) presented with headaches and 10 (66%) had cranial nerve involvement. Extra cavernous sinus extension was noted in 14 (94%). Surgery was performed in 13 (87%) and post-operative radiation was given to 4 (28%) patients. Thirteen patients remained asymptomatic on follow up. Three conspicuous imaging features were highly suggestive of the diagnosis: Lack of diffusion restriction (100%), homogeneous hyperintensity on T2 weighted image sequences (93.3%) and intense post-contrast enhancement (100%). The mean ADC was 1.82 × 10-3 ± 0.2186 cm2/s. CONCLUSIONT1-weighted hypointensity with homogeneous hyperintensity on T2-weighted sequences, intense enhancement and absence of hemosiderin within the lesion on GRE sequence favour the diagnosis. Facilitated diffusion on DWI differentiates CSH from other solid cavernous sinus lesions and significantly improves the diagnostic accuracy, a critical factor for planning surgery.

Adhesion of cavernous hemangioma in the orbit revealed by CT and MRI:analysis of 97 cases

AIM: To assess features of cavernous hemangioma (CH) in the orbit revealed by CT and MRI and summarize prediction of preoperative CT and MRI for the adhesion degree of CH in the orbit. METHODS: A total of 97 patients with pathologically confirmed CH in the orbit were examined with axial and coronal CT scan, and axial, coronal, sagittal, and enhanced fat suppression MRI scan. CT and MRI findings and intraoperative adhesion degrees were retrospectively analyzed. RESULTS: There were 47 patients with slight adhesion, for whom CT and MRI showed round masses with well defined margins in the extraocular muscles; 14 patients with mild adhesion, for whom CT and MRI revealed irregular masses with unclear boundary between CH and the optic nerve in coronal images, and emissary veins in the posterior region of masses in contrast-enhanced images; 36 patients with severe adhesion, for whom CT and MRI exhibited an irregular or ovoid mass filling the orbital apex, or showed distorted and even spiky margins in the posterior region of masses in contrast enhanced images at the presence of a transparent triangle between the mass and the orbital apex. CONCLUSION: Preoperative CT and MRI aid in accurate diagnosis, selection of the surgical approach, and assessment of the adhesion degree and surgical risks for CH.

Pancreatic cavernous hemangioma complicated with chronic intracapsular spontaneous hemorrhage:A case report and review of literature

BACKGROUND Pancreatic cavernous hemangioma(pCH)is a rare type of benign vascular tumor.Making the right diagnosis is challenging due to low clinical suspicion and the lack of existing cross-sectional imaging tools to distinguish it from other pancreatic lesions.CASE SUMMARY We describe a male patient,age 18,who presented with a pCH.Computed tomography,magnetic resonance imaging,and ultrasound showed cystic space in the tail of the pancreas.A dark spot sign on the T2 weighted image sequence was observed.Clinically,a mucinous cystic neoplasm with hemorrhage was suspected preoperatively by combining imaging,and the operative indication was clear.The patient underwent a distal pancreatic tumor resection under laparoscopic control.Immunohistochemical staining for CD31 and CD34 was positive;D2-40 was positive in interstitial lymphatic vessels and negative in vascular epithelial cells;and calcium-binding protein was negative.The results support the diagnosis of pCH combined with chronic intracapsular spontaneous hemorrhage.No complications or recurrences were observed during the follow-up period.CONCLUSION Chronic spontaneous hemorrhage may occur in pCH,which may greatly influence the accuracy of diagnosis using imaging modalities.Surgical resection for uncertain pCH seems reasonable with a good outcome.

Anastomosing hemangioma arising from the left renal vein:A case report

BACKGROUND Anastomosing hemangioma(AH)is a rare subtype of benign hemangioma that is most commonly found in the genitourinary tract.Due to the lack of specific clinical and radiologic manifestations,it is easily misdiagnosed preoperatively.Here,we report a case of AH arising from the left renal vein that was discovered incidentally and confirmed pathologically,and then describe its imaging characteristics from a radiologic point of view and review its clinicopathologic features and treatment.CASE SUMMARY A 74-year-old woman was admitted to our department for a left retroperitoneal neoplasm measuring 2.6 cm×2.0 cm.Her laboratory data showed no significant abnormalities.A non-contrast-enhanced computed tomography(CT)scan showed a heterogeneous density in the neoplasm.Non-contrast-enhanced magnetic resonance imaging(MRI)revealed a heterogeneous hypointensity on T1-weighed images and a heterogeneous hyperintensity on T2-weighed images.On contrastenhanced CT and MRI scans,the neoplasm presented marked septal enhancement in the arterial phase and persistent enhancement in the portal phase,and its boundary with the left renal vein was ill-defined.Based on these clinical and radiological manifestations,the neoplasm was initially considered to be a neurogenic neoplasm in the left retroperitoneum.Finally,the neoplasm was completely resected and pathologically diagnosed as AH.CONCLUSION AH is an uncommon benign hemangioma.Preoperative misdiagnoses are common not only because of a lack of specific clinical and radiologic manifestations but also because clinicians lack vigilance and diagnostic experience in identifying AH.AH is not exclusive to the urogenital parenchyma.We report the first case of this neoplasm in the left renal vein.Recognition of this entity in the left renal vein can be helpful in its diagnosis and distinction from other neoplasms.

Familial cerebral cavernous malformation Retrospective analysis of one Chinese pedigree

Cerebral cavemous malformation （CCM） is a frequently occurring disease in Latin American populations, but little is known about the prevalence in China. This study enrolled one Chinese family with CCM, comprising 16 members; four were diagnosed with CCM which corresponded with autosomal incomplete dominance inheritance. The main clinical manifestations included headache, focal neural dysfunction, and cerebral hemorrhage. The lesions were a mixture of hyperintensity and hypointensity signals on TlWl and T2Wl, with a black hypointensity ring on T2Wl. CCM cranial magnetic resonance imaging T2Wl revealed an iron ring as a result of hemosiderin deposition. Pathological findings of CCM revealed tightly packed and variably thickened vascular channels lacking smooth muscle or elastic tissue. Intralesional hyalinosis, calcification, or bleeding of different phases and perilesional glial hyperplasia were observed, as well as hemosiderin deposition within or around the lesions. These features of this family were consistent with specific genetic, imaging and pathological features of familial CCM. Pathological characteristics reveal repeated hemorrhage, as well as intralesional and perilesional hemosiderin deposition.

Atypical aggressive vertebral hemangioma of the sacrum with postoperative recurrence:A case report

BACKGROUND Aggressive vertebral hemangioma(VH)is an uncommon lesion in the adult population.The vast majority of aggressive VHs have typical radiographic features.However,preoperative diagnosis of atypical aggressive VH may be difficult.Aggressive VHs are likely to recur even with en bloc resection.CASE SUMMARY A 52-year-old woman presented with a 3-mo history of numbness and pain in her right lower extremity.Physical examination showed sacral tenderness and limited mobility,and the muscle strength was grade 4 in the right digital flexor.Computed tomography revealed osteolytic bone destruction from S1 to S2.Magnetic resonance imaging(MRI)showed that the mass was compressing the dural sac;it was heterogeneously hypointense on T1-weighted MRI and hyperintense on T2-weighted MRI,and gadolinium contrast enhancement showed that the tumor was heterogeneously enhanced and invading the vertebral endplate of S1.The patient developed progressive back pain and numbness in the bilateral extremities 6 mo postoperatively,and MRI examination showed recurrence of the mass.The mass was larger in size than before the operation,and it was extending into the spinal canal.CONCLUSION The radiographic findings of atypical aggressive VH include osteolytic vertebral bone destruction,extension of the mass into the spinal canal,and heterogeneous signal intensity on T1-,T2-,and enhanced T1-weighted MRI.These characteristics make preoperative diagnosis difficult,and biopsy is necessary to verify the lesion.Surgical decompression and gross total resection are recommended for treatment of aggressive VH.However,recurrence is inevitable in some cases.

Extradural Hemangioma of Thoracic Spine

A 50-year-old woman presented with mid-thoracic backache and progressive, spastic, paraparesis for 3 months. Magnetic resonance imaging revealed an epidural mass without bone lesion at the level of thoracic vertebrae (T7, T8 and T9). The mass had a paraspinal invasion. The spinal cord was compressed ventrally. The lesion was totally excised through an anterolateral transthoracic approach. Histopathological examination revealed a cavernous hemangioma. The patient improved dramatically after the excision of the lesion. We report this case for its rarity.

Aggressive Dorsal Vertebral Hemangioma Causing Compressive Mielopathy

Vertebral hemangiomas are common benign lesions of the spine, characterized by abnormal vascular proliferation, being commonly asymptomatic incidental findings, presenting symptoms in only a small portion of affected individuals. In a smaller number of cases, however, hemangiomas can present an expansive effect and extra-osseous extension, determining a mass effect and neurological symptoms, being therefore called aggressive hemangiomas. On MRI, aggressive hemangiomas are characterized by having a larger vascular component and a smaller fat component, thus producing a low signal on T1-weighted images. We illustrate the case of a young male patient who presented with pain in the upper thoracic spine, who developed paraparesis and ascending sensory deficit and progressive lower limbs, progressing to paraplegia and loss of sphincter control.

高场磁共振多b值弥散加权成像对肝细胞癌与肝血管瘤的鉴别诊断价值分析

目的分析高场磁共振(MRI)多b值弥散加权成像(DWI)对肝细胞癌与肝血管瘤中的鉴别诊断价值。方法选取行高场MRI-DWI检查的109例患者,所有患者病情经病理检查明晰,43例肝细胞癌患者划入观察组,66例肝血管瘤患者划入对照组,对比两组不同b值下的表观弥散系数(ADC)值;另绘制受试者工作曲线(ROC),分析不同b值下ADC值鉴别诊断肝细胞癌与肝血管瘤的效能。结果b值为50 s/mm 2、400 s/mm 2、1000 s/mm 2时,观察组的ADC值分别为(2.09±0.42)×10^(-3)/mm^(2)/s、(1.72±0.36)×10^(-3)/mm^(2)/s、(1.39±0.28)×10^(-3)/mm^(2)/s,均低于对照组的(2.45±0.57)×10^(-3)/mm^(2)/s、(2.16±0.45)×10^(-3)/mm^(2)/s、(1.88±0.47)×10^(-3)/mm^(2)/s,有统计学差异(P<0.05);ROC结果显示:当b值在1000 s/mm 2时,ADC值鉴别诊断肝细胞癌与肝血管瘤的曲线下面积(AUC)、敏感度、特异度最高,分别为0.816、90.70%、72.70%。结论高场MRI-DWI能够有效鉴别诊断出肝细胞癌与肝血管瘤,且b值越大,诊断效果越强,具有一定的应用价值。

CT增强扫描与磁共振检查诊断肝血管瘤和肝细胞癌价值分析

目的研究CT与磁共振(MRI)增强扫描诊断肝血管瘤(HH)和肝细胞癌(HCC)的价值。方法2020年6月~2022年6月淮安市第一人民医院诊治的HH患者32例和HCC患者37例,常规接受CT和MRI增强扫描,经手术或穿刺取得肝组织,行病理学检查。采用Kappa检验评定诊断方法之间的一致性,应用MedCalc15.1统计学软件绘制受试者工作特征曲线(ROC),计算曲线下面积(AUC),评估诊断效能。结果以病理学检查为诊断的金标准,CT增强扫描发现29例(78.4%)HCC和24例(75.0%)HH,而MRI扫描发现35例(94.6%)HCC和29例(90.6%)HH;经Kappa一致性检验,CT和MRI扫描与病理学诊断HH和HCC具有一致性(Kappa=0.532,P<0.05和Kappa=0.749,P<0.05);MRI扫描诊断肝内占位性的灵敏度、特异度和准确性分别94.6%、90.6%和92.8%,显著优于CT诊断(分别为78.4%、75.0%和76.8%),而两者联合诊断并不能显著提高诊断效能(分别为90.6%、90.6%和92.8%)。结论临床在鉴别原发性肝癌与HH困难时,应首先进行MRI检查。

海绵状血管瘤累及左侧乳房、腋窝及肩背部1例

患者女,31岁,左侧乳房胀痛7年,发现左侧乳房、腋窝及肩背部皮下弥漫性占位并渐进性增大2年余;既往体健,无特殊家族史。查体:左侧乳房、腋窝及肩背部肿胀,见弥漫放射状血管影(图1A),触之质地偏硬、有轻压痛,皮温无明显改变;左侧乳头稍凹陷,无溢液。

眼眶海绵状血管瘤眼眶神经鞘瘤患者的CT MRI影像特征及诊断鉴别研究

目的:观察眼眶海绵状血管瘤、眼眶神经鞘瘤患者的计算机体层摄影(CT)、磁共振成像(MRI)影像特征及诊断鉴别价值。方法:选取2021年1月至2024年1月我院收治的眼眶海绵状血管瘤与眼眶神经鞘瘤患者82例,根据手术病理学诊断结果将患者分为海绵状血管瘤组(n=44)与神经鞘瘤组(n=38),所有患者术前均接受CT、MRI检查,比较两组患者CT、MRI影像特征及两种检查方法对眼眶海绵状血管瘤与眼眶神经鞘瘤的鉴别诊断价值。结果:CT检查显示海绵状血管瘤组患者软组织密度均匀、CT值≥50HU比例高于神经鞘瘤组(P<0.05)。MRI检查显示海绵状血管瘤组患者眼球壁变平、T1WI与T2WI等信号强度、T1WI与T2WI信号均匀、渐进性强化、TIC类型为平台型或流出型比例高于神经鞘瘤组(P<0.05)。MRI检查对眼眶海绵状血管瘤、眼眶神经鞘瘤的定性诊断符合率与定位诊断符合率均高于CT检查(P<0.05)。结论:眼眶海绵状血管瘤与眼眶神经鞘瘤患者的MRI影像特征具有较大差异,且MRI检查对眼眶海绵状血管瘤与眼眶神经鞘瘤的定性与定位诊断价值高于CT检查,可为临床诊断鉴别提供影像学依据。

超声、CT和MRI在眶内海绵状血管瘤诊断中的准确率比较

目的 比较超声、CT和MRI在眶内海绵状血管瘤诊断中的准确率。方法 选择2019年3月至2022年3月接诊的疑似眶内海绵状血管瘤患者80例,分别给予超声、CT、MRI检查,将病理活检穿刺诊断结果作为本研究的金标准,对比超声、CT、MRI定性、定位诊断准确率、灵敏度、特异度,Kappa检验超声、CT、MRI定性、定位诊断与金标准的一致性。结果 MRI、超声定性诊断准确率(87.50%、86.25%)、灵敏度(87.50%、87.50%)、特异度(87.50%、75.00%)均高于CT(72.50%、77.78%、25.00%)差异有统计学意义(P<0.05)。MRI定性诊断准确率、灵敏度、特异度与超声比较,差异无统计学意义(P>0.05)。Kappa检验MRI、超声定性诊断与金标准的一致性均较好(Kappa值=0.728、0.752),CT定性诊断与金标准的一致性一般(Kappa值=0.596)。MRI、CT定位诊断准确率(85.00%、82.50%)、灵敏度(85.71%、84.29%)、特异度(80.00%、70.00%)均高于超声(67.50%、72.86%、30.00%),差异有统计学意义(P<0.05),MRI定位诊断准确率、灵敏度、特异度与CT比较,差异无统计学意义(P>0.05)。Kappa检验MRI、CT定位诊断与金标准的一致性均较好(Kappa值=0.734、0.771),超声定位诊断与金标准的一致性一般(Kappa值=0.586)。结论 眶内海绵状血管瘤诊断中,超声定性诊断准确率较高,CT定位诊断准确率较高,MRI定性与定位诊断准确率均较高,可辅助临床制定治疗方案,但价格昂贵,故医生应根据患者实际情况选择最佳的诊断技术。

超声、CT、MRI单独与联合诊断眼眶海绵状血管瘤的价值分析

目的探讨超声、电子计算机断层扫描(computed tomography,CT)以及核磁共振(magnetic resonance imaging,MRI)对眼眶海绵状血管瘤(orbital cavernous hemangioma,OCH)的诊断效能。方法选取2019年1月至2021年1月眼科收治经手术病理证实OCH患者53例,以病理学诊断为标准,归纳总结OCH患者的超声、MRI影像学表现异同,探讨最适合鉴别区分OCH的影像学检查方法。结果超声扫描:53例OCH患者中未检查到2例,明确位于肌锥内51例,B超表现为肿物呈圆形或类圆形,边界不清晰,内回声多且分布不均匀,声衰减少,肿物内未见血流信号;肌锥内组的RT、mTT与非肌锥内组相比更慢(P<0.05)。MRI扫描:53例OCH患者中经眶上裂蔓延至颅内1例,与脑组织分界清晰;位于眼眶锥内51例,MRI显示肿瘤呈圆形或类圆形,动态增强扫描呈渐进性明显均匀强化。CT扫描:53例OCH患者不均匀渐进性强化,肿瘤直径>1.5 cm 49例,肿瘤直径<1.5 cm,均匀强化4例。以病理诊断为金标准,超声、CT联合MRI诊断OCH的灵敏度、特异度、准确度(95.67%、88.91%、92.37%)高于单独超声、CT、MRI诊断。结论渐进性强化[不均匀或(和)持续性]是OCH特点,超声、CT及MRI对OCH诊断作用重要优势各异,超声在OCH定位诊断方面优势明显,MRI除能直接形成冠状位、矢状位及横轴位三种位置图像外,其他方面与CT相比优势不显著,超声、CT、MRI联合诊断对提升OCH诊断符合率有益。

磁共振成像在成人眼眶海绵状血管瘤诊断中的价值探讨

目的 分析眼眶海绵状血管瘤的磁共振成像(MRI)影像征象,探讨其对海绵状血管瘤的诊断价值。方法 回顾性分析经手术病理证实的17例海绵状血管瘤患者的MRI影像学表现,并与手术结果对照。结果 MRI能清楚显示肿瘤与眼外肌及视神经的关系。海绵状血管瘤有特殊的强化方式,表现为中央或边缘局部点状及小结节状强化,然后逐步向全肿瘤填充扩展。结论 MRI可对海绵状血管瘤准确定位,揭示痛变与周围组织关系。MRI增强检查对诊断海绵状血管瘤有重要诊断意义。

磁共振弥散加权成像检查在肝细胞癌、肝血管瘤鉴别诊断中的价值

目的:探讨磁共振弥散加权成像(diffusion weighted imaging,DWI)检查在肝细胞癌、肝血管瘤鉴别诊断中的价值。方法:回顾性分析2020年8月—2022年8月贵州茅台医院收治的89例肝脏肿瘤患者的临床资料。所有患者均开展常规磁共振成像(magnetic resonance imaging,MRI)平扫、磁共振DWI检查。以术后病理为金标准。统计常规MRI平扫、磁共振DWI检查对肝细胞癌及肝血管瘤检出情况。分析常规MRI平扫、磁共振DWI检查鉴别诊断肝细胞癌、肝血管瘤的价值。分析常规MRI平扫、磁共振DWI检查与术后病理的一致性。比较肝细胞癌及肝血管瘤患者不同b值平均表观扩散系数(apparent diffusion coefficient,ADC)值。结果:89例肝脏肿瘤患者经术后病理检出肝细胞癌34例,肝血管瘤55例。常规MRI平扫检出肝细胞癌29例,肝血管瘤60例;磁共振DWI检查检出肝细胞癌33例,肝血管瘤56例。磁共振DWI检查的敏感度、准确度均高于常规MRI平扫,差异有统计学意义(P<0.05)。Kappa检验显示,常规MRI平扫与术后病理一致性尚可(Kappa=0.731,P<0.001);磁共振DWI检查与术后病理一致性极好(Kappa=0.928,P<0.001)。肝细胞癌患者50 s/mm^(2)、400 s/mm^(2)、1 000 s/mm^(2)平均ADC值均低于肝血管瘤患者,差异有统计学意义(P<0.05)。结论:磁共振DWI检查在肝细胞癌、肝血管瘤鉴别诊断中价值更高,可提高疾病诊断敏感度、准确度,减少漏诊、误诊发生,以便于更好地指导临床治疗。