ISSN 1004-4140
CN 11-3017/P

双源CT对成人房间隔缺损肺动脉高压的诊断价值

赵海珊, 王诚, 韩曙光, 徐彤彤, 伍雪晴, 胡春峰

赵海珊, 王诚, 韩曙光, 等. 双源CT对成人房间隔缺损肺动脉高压的诊断价值[J]. CT理论与应用研究, 2023, 32(6): 761-769. DOI: 10.15953/j.ctta.2022.199.
引用本文: 赵海珊, 王诚, 韩曙光, 等. 双源CT对成人房间隔缺损肺动脉高压的诊断价值[J]. CT理论与应用研究, 2023, 32(6): 761-769. DOI: 10.15953/j.ctta.2022.199.
ZHAO H S, WANG C, HAN S G, et al. The Diagnostic Value of Dual-source CT in Adult Atrial Septal Defect with Pulmonary Hypertension[J]. CT Theory and Applications, 2023, 32(6): 761-769. DOI: 10.15953/j.ctta.2022.199. (in Chinese).
Citation: ZHAO H S, WANG C, HAN S G, et al. The Diagnostic Value of Dual-source CT in Adult Atrial Septal Defect with Pulmonary Hypertension[J]. CT Theory and Applications, 2023, 32(6): 761-769. DOI: 10.15953/j.ctta.2022.199. (in Chinese).

双源CT对成人房间隔缺损肺动脉高压的诊断价值

基金项目: 江苏省卫生健康委项目(Z2018037)。
详细信息
    作者简介:

    赵海珊: 女,徐州医科大学/徐州医科大学附属医院影像医学与核医学专业在读研究生,主要研究方向为CT和MRI在心血管疾病的临床应用,E-mail:584408224@qq.com

    通讯作者:

    胡春峰: 男,徐州医科大学附属医院影像科主任医师,主要从事影像诊断工作,尤其擅长心血管、胸部疾病的影像诊断,E-mail:hcfxz@163.com

  • 中图分类号: R  814

The Diagnostic Value of Dual-source CT in Adult Atrial Septal Defect with Pulmonary Hypertension

  • 摘要:

    目的:探讨双源CT评价成人房间隔缺损(ASD)合并肺动脉高压(PAH)的诊断价值。方法:回顾性分析我院75例成人ASD患者,根据右心导管(RHC)检查术所得肺动脉平均压(mPAP)是否≥25 mmHg分为PAH组(40例)和无PAH组(35例)。所有患者均在术前1周内行DSCT先天性心脏病检查,测量升主动脉直径(AAD)、主肺动脉直径(MPAD)、右肺动脉干直径(RPAD)、左肺动脉干直径(LPAD)、右下肺动脉直径(RLPAD)、双心室短轴最大内径(RVD、LVD)、脊柱室间隔夹角、ASD直径,计算MPAD与AAD比值(rPA)、RVD与LVD比值(RVD/LVD)。采用t检验评价两组患者临床资料、RHC检查指标、CT心血管参数差异;使用ROC曲线确定双源CT对成人ASD合并PAH的诊断效能;使用Pearson等级相关系数分析CT参数与mPAP、PVR的相关性。结果:两组间差异有统计学意义的CT指标有MPAD、RPAD、LPAD、RLPAD、RVD、脊柱室间隔夹角、rPA、RVD/LVD、ASD直径,其中RPAD、LPAD、脊柱室间隔夹角、rPA、RVD/LVD、ASD直径对PAH具有中等强度的诊断效能(AUC均>0.7);MPAD、rPA、ASD直径与mPAP呈中度正相关,MPAD、rPA、RVD/LVD与PVR呈中度正相关,ASD直径与PVR呈高度正相关。结论:双源CT对成人ASD合并PAH具有一定的诊断价值,可以为临床治疗前综合评估、长期随访与管理提供较好的依据。

    Abstract:

    Objective: To investigate the diagnostic value of dual-source CT (DSCT) in evaluating adults with atrial septal defect (ASD) with pulmonary hypertension (PAH). Methods: Seventy-five adult patients with ASD in our hospital were retrospectively analyzed. The study sample was divided into 2 groups (PAH group (n=40) and non-PAH group (n=35 cases)) according to the mean pulmonary artery pressure (mPAP) obtained by right cardiac catheterization (RHC) (PAH: ≥ 25 mmHg). All patients were examined for congenital heart disease by DSCT one week before RHC. The ascending aorta diameter (AAD), main pulmonary artery diameter (MPAD), right pulmonary artery diameter (RPAD), left pulmonary artery diameter (LPAD), right lower pulmonary artery diameter (RLPAD), the maximum diameter of the short axis of both the ventricles (RVD, LVD), included the angle of the spinal ventricular septum and ASD diameter, were measured on the image. The MPAD to AAD ratio (rPA) and the RVD to LVD ratio (RVD/LVD) were calculated. Differences between the two groups in terms of clinical data, RHC indexes, and CT cardiovascular parameters were evaluated by a t-test. The ROC curve was used to determine the diagnostic efficacy of DSCT in adults with ASD and PAH. Pearson correlation coefficient was used to analyze the association between the CT parameters, mPAP, and PVR. Results: The statistically significant CT indexes between the two groups were MPAD, RPAD, LPAD, RLPAD, RVD including the angle of the spinal ventricular septum, rPA, RVD/LVD, and ASD diameter. Of these, the RPAD and LPAD including the angle of the spinal ventricular septum, rPA, RVD/LVD, and ASD diameter demonstrated moderate diagnostic efficacy for PAH (AUC>0.7). The MPAD, rPA, and ASD diameter with mPAP were moderately positively correlated. The MPAD, rPA, and RVD/LVD with PVR were also mildly positively correlated. Furthermore, the ASD diameter and PVR were highly positively correlated. Conclusion: DSCT is diagnostically valuable for the evaluation of adults with ASD complicated with PAH. In particular, DSCT may be used to provide a comprehensive evaluation before clinical treatment, as well as for long-term follow-up and management.

  • 患者,女,60岁。因阵发性头痛、头晕10 d、右眼疼痛1 d入院。10 d前患者无明显诱因出现头痛,呈阵发性闷痛,伴头昏、头闷不适,伴轻度恶心,无视物模糊,无耳鸣及听力障碍,无意识障碍、大小便失禁,无畏寒发热,无肢体抽搐、麻木及活动障碍,无言语不清、饮水反呛,无咳嗽咳痰,无胸痛胸闷,无腹痛腹泻;1 d前感右眼疼痛,伴右眼睑下垂。患者既往有高血压病史,长期正规使用降压药物,血压维持正常;否认糖尿病、冠心病、脑梗死等病史,否认手术外伤史。

    体格检查:体温36.3℃,脉搏71次/min,呼吸17次/min,血压125/70 mmHg。神志清晰,精神较差,步入病房;全身皮肤无黄染,全身浅表淋巴结未见肿大;双肺呼吸音粗,双肺未闻及啰音,心率71次/min,律齐,无杂音。腹软,无压痛反跳痛,肝脾肋下未触及;双下肢无浮肿。

    专科检查:神志清楚,言语清晰,高级智能正常。右眼上睑轻度下垂,眼球内转、上转、下转均部分受限,眼位:-15°,余眼球活动正常;右侧瞳孔稍散大,直径4 mm,光反射迟钝,左侧瞳孔直径3 mm,光反射灵敏;视力:右眼0.6、左眼0.15,矫正不应;眼压:右眼17.3 mmhg,左眼17.5 mmhg;双眼眼底未见明显异常。鼻唇沟等深,口角无歪斜,伸舌居中。四肢肌力、肌张力正常,腱反射对称,病理征未引出。脑膜刺激征阴性,共济运动正常,感觉检查正常。

    实验室检查:血常规检查显示白细胞5.85×109/L,红细胞4.27×1012/L,血红蛋白124 g/L,CRP小于10 mg/L,血小板275×109/L;BNP及心梗3项、PCT均正常;电解质正常。泌乳素(PRL)45.34 ng/mL升高;皮质醇(8 Am)2.66 ug/dl降低;促肾上腺皮质激素(0 AM)2.46 pg/mL降低,促肾上腺皮质激素(4 PM)4.96 pg/mL降低,促肾上腺皮质激素(8 AM)3.72 pg/mL降低。

    CT、MRI检查:颅脑CT(图1)示鞍区偏右侧稍低密度结节,头颈部CTA增强鞍区偏右侧结节轻度强化,邻近后床突骨质破坏,密度不均匀性减低。颅脑MRI(图2)示鞍区垂体显示不清,垂体窝偏右侧见T1WI呈低信号、T2WI呈高信号结节,FLAIR呈略高信号,且DWI水分子扩散受限呈高信号,增强扫描结节较明显强化,邻近双侧颈内动脉虹吸段呈流空信号。垂体MRI平扫+增强(图3)示垂体窝稍扩大,垂体窝偏右侧见约1.6 cm×1.3 cm×1.3 cm大小软组织信号结节,垂体柄向左侧偏移,增强后呈不均匀强化。双侧颈内动脉海绵窦段位置对称;双侧视交叉上抬;考虑鞍区占位,肿瘤性病变,垂体大腺瘤可能。

    图  1  颅脑CT
    Figure  1.  Cranial CT
    图  2  颅脑MRI
    Figure  2.  MRI of the cranial brain
    图  3  垂体MRI
    Figure  3.  MRI of hypophysis

    临床拟诊垂体瘤,痛性眼肌麻痹,完善术前相关检查,在全麻下行经蝶窦鞍区病损切除术。术中见鞍底突入蝶窦腔,邻近骨质较厚,磨开鞍底骨质即可见肿瘤结节病灶,质软、呈白色,用刮圈刮除鞍区肿瘤组织,冲洗术腔,电凝止血,并在肿瘤残腔填入明胶海绵止血,蝶窦腔填塞明胶海绵止血。退出撑开器,鼻粘膜复位,右侧鼻腔填入膨胀海绵止血结束手术。

    术后病理学检查(图4):(鞍区肿瘤)恶性肿瘤,符合小圆细胞性未分化肉瘤。免疫组化:CK(-),Vim(+),EMA(灶+),NF(灶+),CD99(+),WT-1(灶+),GH(-),PRL(-),ACTH(-),TSH(-),GFAP(-),S-100(-),CK20(-),CD34(-),CgA(-),NSE(-),Syn(-),CD117(-),INI-1(-),LCA(-),Ki67阳性细胞数80%。术后放化疗,5月后复查鞍区MR局部复发,可见新肿块形成(图5)。

    图  4  病理及免疫组化
    Figure  4.  Pathology and immunohistochemistry
    图  5  术后5月,右侧桥前池明显强化软组织信号结节
    Figure  5.  At 5 months after surgery, the right anterior pontine pool significantly enhanced the soft tissue signal nodules

    软组织未分化肉瘤可发生于任何年龄,无明显性别差异。相对来说,梭形细胞未分化肉瘤和多形性未分化肉瘤多发生于50~70岁中老年人,并以男性多见,极少发生于儿童,而小圆细胞性肉瘤多发生于儿童和青少年。垂体腺瘤在成人鞍区肿瘤中最为常见,其他性质的肿瘤仅占10% 左右,有文献报道[1],原发于鞍区小圆细胞性未分化肉瘤非常罕见,且发生在鞍区未分化肉瘤可能与垂体腺瘤患者放疗后相关。

    2013年版WHO软组织分类新设立了未分化/未分类软组织肉瘤(undifferentiated/unclassified soft tissue sarcoma,USTS),这一类软组织肉瘤相对比较少见,约占软组织肉瘤的20%[2]。根据瘤细胞的组织学形态,USTS可分为梭形细胞未分化肉瘤、多形性未分化肉瘤、小圆细胞未分化肉瘤和上皮样未分化肉瘤[3]。鞍区肿瘤中,原发性肉瘤极少见,其中发生率最高的是纤维肉瘤,且主要发生于垂体良性肿瘤术后放疗后[4-5],其中至少25% 放射相关的软组织肉瘤为未分化肉瘤。鞍区良性肿瘤主要包括垂体腺瘤、脑膜瘤、神经鞘瘤、肌纤维母细胞瘤、毛细胞性星形细胞瘤等[6-7];其经放疗后易出现的恶性肿瘤主要包括血管周细胞瘤、纤维肉瘤、骨肉瘤、软骨肉瘤、平滑肌肉瘤、横纹肌肉瘤等峰[5,8],其中横纹肌肉瘤是发生于儿童的最常见的肉瘤[9-10],极少发生小圆细胞未分化肉瘤。

    本例小圆细胞未分化肉瘤CT表现为稍低密度结节影,平扫与垂体及邻近海绵窦分界不清楚,邻近蝶鞍后床突可见骨质破坏,可提示恶性肿瘤可能。MRI可见垂体窝扩大,垂体窝偏右侧软组织信号结节影,T1WI呈低信号,T2WI呈高信号,似见与正常垂体有边界,垂体柄受压向左侧偏移,视交叉上抬,增强结节明显强化,强化不均匀,早期明显强化与正常垂体可见分界,强化方式不一致。但本例患者结节位于垂体窝内,信号差异不明显,增强扫描呈渐进性强化,早期虽较正常垂体强化低,术前误诊考虑垂体大腺瘤可能。术后复习垂体MRI影像,仔细可见肿瘤与垂体似见边界,偏侧可见正常垂体,垂体呈受压改变,应考虑到肿瘤不来源垂体,另外强化以延迟性强化较明显,且强化不均匀,也不是典型垂体腺瘤强化方式,垂体瘤虽可压迫蝶鞍至蝶鞍扩大,但基本上不会累及蝶鞍导致骨质破坏。国外文献[5,10-11]中非辐射暴露下发生的鞍区原发未分化肉瘤迄今仅报道3例,因此病罕见,无大宗病例报道,因此对其临床、影像表现和治疗都缺乏经验。

    复习文献并结合该病例,CT鞍区稍低密度,MR T1WI呈低信号,T2WI呈高信号软组织结节,DWI扩散受限,ADC值降低,可累及邻近颅底骨质,甚至骨质破坏,在排除鞍区其他常见肿瘤后,应考虑到小圆细胞未分化肉瘤等罕少见恶性肿瘤可能。Sateen等[1]报道1例鞍区原发未分化肉瘤患者,术后行放疗、化疗,术后半年未见肿瘤复发。但对其总体预后难以评估,未分化肉瘤恶性程度极高,即使术后及时行放化疗或伽玛刀等综合治疗,其总体预后应较差[12],本例术后半年复发。

    未分化肉瘤因缺少大多数特征性的免疫标识,影像学表现不典型,术前诊断与鉴别诊断均较困难。需注意与垂体瘤、颅咽管瘤、鞍区脑膜瘤鉴别。

    垂体瘤:肿瘤向上生长,突破鞍膈则可以见到鞍上池变形,甚至有一些情况下会出现大部分的闭塞,其中可以看到有等密度或者稍高密度的肿块。肿瘤当中可以见到有坏死或者囊性的低密度区。如果是向下生长,会在蝶窦内出现圆形的软组织影。CT表现为稍高密度影;MRI提示病变区T1WI为等信号,T2WI为高信号,明显均匀强化。垂体瘤通常DWI信号不高,而小圆细胞未分化肉瘤DWI呈高信号具有一定特征性。

    颅咽管瘤:CT表现提示病灶位于鞍上或鞍内,多数呈均匀低密度,部分呈均匀等密度或低等混杂密度灶。肿瘤钙化率较高,约半数沿肿瘤边缘分布,呈壳状,其余为大小不等、多少不一的块状或点状钙化,也可几种钙化形态同时存在。增强后,囊性病灶可见囊壁呈薄环状或壳状增强,少数可显示薄壁分房状强化。实质性肿瘤呈不均匀或均匀强化。颅咽管瘤通常有钙化,且大多位于鞍上区,可资鉴别。

    鞍区脑膜瘤:肿瘤多呈圆形或椭圆形,边界较清楚,多以鞍结节或床突为附着点,可向各个方向生长。病灶密度或信号多均匀,CT平扫多呈等密度或稍高密度,其内可见点状或斑片状钙化影;MRI扫描T1WI多呈等信号或稍低信号,T2WI多呈等信号或稍高信号,其内钙化灶在T1WI、T2WI均为低信号;动态增强扫描,肿瘤多呈均匀明显强化,部分病灶在轴位和矢状位上可显示肿瘤邻近脑膜增厚并明显强化,形成典型的“脑膜尾征”。脑膜瘤通常造成邻近骨质增生,具有良性肿瘤的表现,而小圆细胞未分化肉瘤出现骨质破坏,表现出恶性特征。

    小圆细胞性未分化肉瘤是一种高度恶性肿瘤,预后较差。本例发生于中老年女性的小圆细胞未分化肉瘤甚少见。软组织肉瘤可发生于任何部位,但绝大多数病例发生于四肢、躯干和头颈部软组织内,发生在鞍区也实属罕见。未分化/未分类软组织肉瘤的临床表现无特异性,主要表现为深部软组织肿块,但本例发生在鞍区表现为软组织密度小结节,病灶小,却引起了邻近器官相应临床表现,并出现垂体相关激素泌乳素(Prolactin,PRL)升高、皮质醇及促肾上腺皮质激素降低,垂体柄和视交叉受压,瞳孔不等大,视物有重影,视物模糊,右眼疼痛,上睑轻度下垂,眼球旋转部分受限。

    本例行颅脑CT呈稍低密度结节,邻近骨质可见破坏,MRI可见鞍区结节扩散受限呈高信号,ADC值明显降低,提示恶性肿瘤可能。因此术前阅片不仔细,对鞍区典型肿瘤,如垂体瘤影像表现不熟悉,是本例误诊为垂体瘤的主要因素。但该病例肿瘤病理类型少见,同时发生在罕见部位,术前无论是临床还是影像诊断都困难,最终确诊需术后病理学检查。

  • 图  1   女,57岁,ASD合并PAH,mPAP=41.0 mmHg

    Figure  1.   Female, 57 years old, atrial septal defect with pulmonary hypertension, mPAP=41.0 mmHg

    图  2   女,57岁,ASD不合并PAH,mPAP=16.0 mmHg

    Figure  2.   Female, 57 years old, atrial septal defect without pulmonary hypertension, mPAP=16.0 mmHg

    表  1   两组间临床基线资料及RHC指标比较

    Table  1   Comparison of clinical baseline data and right heart catheterization indexes between the two groups

    项目组别P
    无PAH组(n=35)PAH组(n=40)
        年龄/岁    40.49±16.99    44.68±12.28 0.22
        男性/(n,%)    11.00(31.43)    10.00(25.00) 0.54
        BSA/m2    1.65±0.11    1.67±0.14 0.59
        NYHA分级<0.05
        Ⅰ~Ⅱ级(n,%)    35.00(100.00)    31.00(77.50)
        Ⅲ~Ⅳ级(n,%)    0.00(0.00)    9.00(22.50)
        PASP/mmHg    38.03±12.78    50.85±20.76<0.05
        PADP/mmHg    16.12±6.80    20.98±8.80<0.05
        mPAP/mmHg    17.97±2.75    34.00±11.08<0.05
        PVR(Wood)    1.38±0.67    5.70(3.24~15.12)<0.05
    下载: 导出CSV

    表  2   两组间CT心血管参数测量值比较

    Table  2   Comparison of CT cardiovascular parameters between the two groups

    心血管参数 组别P
    无PAH组(n=35)PAH组(n=40)
        AAD28.91±4.7428.41±4.81 0.652
        MPAD/mm31.14±6.2736.34±8.52<0.05
        RPAD/mm23.66±5.2827.91±6.23<0.05
        LPAD/mm23.05±5.2427.30±5.84<0.05
        RLPAD/mm14.24±2.7816.49±3.75<0.05
        RVD/mm43.22±9.7248.43±8.75<0.05
        LVD/mm35.97±5.7734.87±7.89 0.499
        脊柱室间隔夹角/° 51.93±12.83 61.87±11.68<0.05
        rPA 1.08±0.18 1.31±0.38<0.05
        RVD/LVD 1.21±0.24 1.43±0.29<0.05
        ASD直径/mm17.28±4.4324.95±5.32<0.05
    下载: 导出CSV

    表  3   CT心血管参数预测PAH的ROC曲线分析

    Table  3   ROC curve analysis of CT cardiovascular parameters predicting PAH

    心血管参数AUC值(95%CI)P截断值敏感度/%特异度/%约登指数
      MPAD/mm0.68(0.55~0.80)<0.0535.000.580.740.32
      RPAD/mm0.71(0.59~0.83)<0.0521.950.880.510.39
      LPAD/mm0.72(0.60~0.83)<0.0523.500.800.600.40
      RLPAD/mm0.68(0.56~0.81)<0.0516.950.450.910.36
      脊柱室间隔夹角/°0.72(0.61~0.84)<0.0563.350.530.860.38
      rPA0.70(0.58~0.82)<0.05 1.200.630.830.45
      RVD/LVD0.71(0.59~0.82)<0.05 1.220.830.510.34
      ASD直径/mm0.85(0.77~0.93)<0.0522.320.680.890.56
    下载: 导出CSV

    表  4   mPAP与CT心血管测量参数相关性分析

    Table  4   Correlation analysis of mPAP and CT cardiovascular measurement parameters

    心血管参数  rP
      MPAD/mm0.51<0.05
      RPAD/mm0.45<0.05
      LPAD/mm0.44<0.05
      RLPAD/mm0.47<0.05
      脊柱室间隔夹角/°0.36<0.05
      rPA0.61<0.05
      RVD/LVD0.47<0.05
      ASD直径/mm0.62<0.05
    下载: 导出CSV

    表  5   PVR与CT心血管测量参数相关性分析

    Table  5   Correlation analysis of PVR and CT cardiovascular measurement parameters

    心血管参数  rP
      MPAD/mm0.56<0.05
      RPAD/mm0.48<0.05
      LPAD/mm0.47<0.05
      RLPAD/mm0.44<0.05
      脊柱室间隔夹角/°0.39<0.05
      rPA0.63<0.05
      RVD/LVD0.52<0.05
      ASD直径/mm0.81<0.05
    下载: 导出CSV

    表  6   CT心脏参数测量值相关性分析

    Table  6   Correlation analysis of CT cardiac parameter measurements

    相关系数  RVDLVDRVD/LVD脊柱室间隔夹角
       RVD1.00
       LVD0.49**1.00
       RVD/LVD0.45**-0.06 1.00
       脊柱室间隔夹角0.52**-0.47**0.50**1.00
     注:**-在0.01级别(双尾),相关性显著。
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-10-14
  • 录用日期:  2023-04-06
  • 网络出版日期:  2023-04-10
  • 刊出日期:  2023-10-31

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