T2*磁共振灌注成像监测乳腺癌新辅助化疗疗效的应用研究

目的 探讨MR T2*首过灌注成像(T2*-PWI)在乳腺癌中的应用及早期监测乳腺癌新辅助化疗疗效的价值.方法 分析45例乳腺癌(均为浸润性导管癌)T2*-PWI,比较19例按疗程随访的PWI结果(化疗前,2个疗程后),统计乳腺T2*-PWI成功率;并以负性增强积分、负性首过斜率及最大信号丢失率为分析数据源,观察分析新辅助化疗疗效.所有病例均经手术病理证实.结果 (1)乳腺癌的PWI成功率91.1%(41/45),乳腺癌灶的负性灌注曲线表现为MR信号在短暂平台期后快速下降,较少或不出现信号强度恢复.(2)新辅助化疗中对治疗敏感的肿瘤负性灌注曲线渐趋平缓.比较化疗前,2疗程后肿瘤PWI负性灌注曲线测得的负性增强积分、负性首过斜率及最大信号丢失率(P<0.01),2组差异有显著统计学意义.结论 T2*-PWI可用于评价、预测乳腺癌新辅助化疗的疗效.     

表观扩散系数预测乳腺癌新辅助化疗反应初探

目的 探讨乳腺癌患者新辅助化疗前肿瘤表观扩散系数(ADC)及化疗第1周期后ADC的变化,预测新辅助化疗反应的价值.方法 20例21个病灶经穿刺活检证实为乳腺癌的患者分别于阿霉素类和紫杉类抗肿瘤新辅助化疗前1周之内、第1周期化疗后(18～21 d之内)、术前1周之内进行MR扩散加权成像(DWI)和增强扫描,根据增强MRI肿瘤的变化,将其分为反应组及相对无反应组,对2组肿瘤初始ADC及化疗第1周期后ADC的变化进行分析.结果 反应组15个病灶化疗前初始ADC为(0.98±0.15)×10-3 mm2/s,化疗第1周期后升高到(1.22±0.23)x 10-3 mm2/s,差异具有统计学意义(P<0.05);相对无反应组6个病灶化疗前初始ADC为(1.09±0.08)×10-3mm 2/s,第1周期后为(1.11±0.07)×10-3 mm2/s,差异无统计学意义(P>0.05);反应组初始ADC低于相对无反应组(P<0.05);肿瘤初始ADC与化疗第1周期后ADC的变化值呈负相关关系(r=-0.51,P<0.05).结论 初步研究结果表明,乳腺癌肿瘤初始ADC值及新辅助化疗第1周期后ADC值变化有可能成为预测乳腺癌新辅助化疗疗效的指标之一.     

磁共振扩散加权成像早期预测乳腺癌新辅助化疗疗效价值研究

目的 评价磁共振扩散加权成像(DWI)对乳腺癌新辅助化疗(NAC)疗效的早期预测价值.方法 对35例病理证实的乳腺癌,在化疗前、化疗2个疗程、化疗后术前进行MRI检查,做扩散加权成像(DWI)和动态增强,按手术病理分为组织学显著反应组(MHR组)和非组织学显著反应组(N-MHR组),比较两组表观扩散系数(ADC)、肿瘤最大径及体积变化率的差异,分析ADC变化率的受试者工作特性曲线(ROC),预测获得MHR的ADC变化率临界值(cut-off value).结果 在化疗2个疗程后,两组ADC值,有显著性差异,P值=0.009;肿瘤最大径、肿瘤体积变化率,两组无显著性差异,P值分别为0.244和0.313.以ADC值升高12.5％为ADC值变化率诊断分界点,预测获得MHR的敏感性和特异性分别为73.7％和81.2％.结论 化疗中监测ADC值变化,有可能是早期预测NAC是否能获得MHR的指标.     

乳腺癌新辅助化疗后不同退缩方式肿瘤的形态学及分子生物学特征比较研究

目的评价乳腺癌新辅助化疗后不同退缩方式肿瘤的形态学及分子生物学特征。方法收集2011年1月—2014年12月间于我院经组织学确诊为乳腺癌的病人22例,均于新辅助化疗前、化疗4周期后行乳腺动态增强MRI检查,化疗结束2周内行乳腺癌根治术。分析化疗后肿瘤的退缩方式,并分别采用独立样本t检验和Fisher确切概率法比较不同退缩方式的肿瘤体积退缩比例以及肿瘤的病变类型、化疗反应分度和肿瘤分子生物学特征指标的差异。结果 22例乳腺浸润性导管癌经新辅助化疗后有14例表现向心性退缩,8例表现多中心退缩。向心性退缩组与多中心退缩组乳腺癌的肿瘤体积退缩比例分别为71.8%±28.3%和38.7%±24.8%,两组间差异有统计学意义(t=2.757,P=0.012)。向心性退缩组多表现为肿块型病变(11/14,78.6%),多中心退缩组多表现为非肿块型病变(6/8,75%),不同退缩方式肿瘤的病变类型间差异有统计学意义(P=0.026)。不同退缩方式肿瘤的化疗反应分度、雌激素受体和孕激素受体表达情况、HER2、p53、Ki-67和分子分型间差异均无统计学意义(均P0.05)。结论乳腺癌新辅助化疗后不同的退缩方式与治疗前肿瘤的形态有关,乳腺癌新辅助化疗后向心性退缩多为肿块型病变,多中心退缩多为非肿块型病变。     

超声造影技术在乳腺癌新辅助化疗疗效评估中的应用价值

目的探讨超声造影技术在乳腺癌新辅助化疗(neoadjuvant chemotherapy,NAC)疗效评估中的应用价值。方法对54例乳腺癌患者实施第一次新辅助化疗前及手术前后采用乳腺超声造影检查,分析乳腺超声造影在乳腺癌新辅助化疗的价值。结果常规二维超声检查显示54例乳腺癌患者的54处乳腺癌原发灶的体积在新辅助化疗后较化疗前明显下降,且差异具有统计学意义(T=10.69,P0.05)。新辅助化疗前后对54例乳腺癌患者进行超声造影检查,发现化疗后乳腺癌原发灶内超声对比剂的灌注区域(长径×横径)较化疗前明显缩小,差异具有显著性(T=6.98,P0.05)。54例乳腺癌患者的54处乳腺癌原发灶内对比剂增强强度在化疗后较新辅助化疗前明显减弱,差异具有显著性(t=16.85,P0.05)。结论超声造影技术不仅能够体现新辅助化疗的效果,安全、无创、直观地评价肿瘤内新生血管网的特征。     

MRI评估及预测乳腺癌新辅助化疗疗效研究进展

准确评估及预测乳腺癌新辅助化疗后的病理反应有助于了解病情变化。MRI可以反映肿瘤形态、乳腺背景实质强化、肿瘤血流灌注及水分子扩散运动变化等重要信息,对评估和预测乳腺癌新辅助化疗疗效具有重要作用。基于MRI的影像组学可以从医学图像中获取定量和高通量的特征,反映肿瘤的异质性,从而实现对乳腺癌新辅助化疗疗效的精准评估及预测。就MRI评估及预测乳腺癌新辅助化疗疗效的研究进展予以综述。     

多模态MRI联合血清miR-125b对乳腺癌新辅助化疗疗效的预测价值

目的:探讨乳腺癌治疗前多模态MRI联合血清miR-125b水平预测新辅助化疗疗效的价值。方法:研究对象为于我院首次接受全程新辅助化疗并行手术切除治疗的90例女性乳腺癌患者。治疗前对患者进行乳腺MRI检查,记录病灶直径、边缘、形状、平扫T₂WI图像上病灶内是否高信号和时间信号强度曲线(TIC)类型、表观扩散系数(ADC)、单纯扩散系数(D)、伪扩散系数(D~*)及灌注分数(f)。依据Miller-Payne分级标准对病理学反应进行评估,分为病理反应不佳(NR)组和病理反应良好(R)组。结果:乳腺癌患者新辅助化疗后R组52例(57.78%),NR组38例(42.22%),两组的年龄、临床分期、病理类型、雌激素受体(ER)、孕激素受体(PR)和人表皮生长因子受体2(HER2)表达水平差异无统计学意义(P>0.05)。R组中Ki-67>14%的比例显著高于NR组(P<0.05)。R组与NR组的肿瘤直径、边缘、形状、T₂WI信号、D值和D~*值差异均无统计学意义(P>0.05)。R组的TIC类型为Ⅲ型的比例显著高于NR组,ADC...     

fMRI监测乳腺癌新辅助化疗疗效的应用

目的:探讨磁共振波谱(1H-MRS)、扩散加权成像(DWI)和首过灌注成像(PWI)对早期监测乳腺癌新辅助化疗疗效的价值.方法:19例乳腺癌患者在术前进行新辅助化疗,比较化疗前和2个疗程后病灶的1H-MRS,DWI和PWI表现,观察分析新辅助化疗疗效.所有病例均经手术病理证实.结果:乳腺癌在DWI上信号强度较高,ADCb=1000值较低[(1.12±0.03)×10-3mm2/s];17例化疗后缓解病例在治疗后ADC值升高[(1.29±0.05)×10-3mm2/s],肿瘤有缩小趋势.1H-MRS示乳腺癌组织可出现明显的胆碱复合峰(11/17);化疗后部分缓解病例(10/11),肿瘤内胆碱复合峰下降或消失.PWI示乳腺癌灶的负性灌注曲线表现为MR信号在短暂平台期后快速下降,较少或不出现信号强度恢复;新辅助化疗后肿瘤负性灌注曲线渐趋平缓.结论:1H-MRS、DWI和PWI均可用于乳腺癌的诊断,并为乳腺癌新辅助化疗早期监测疗效提供有价值的诊断信息.     

氢质子磁共振波谱监测乳腺癌新辅助化疗疗效的应用研究

目的:探讨乳腺癌氰质子磁共振波谱(~1H-MRS)的谱线特征及早期临测乳腺癌新辅助化疗疗效的价值.方法:前瞻性研究一组98例在术前进行新辅助化疗的乳腺癌患者(99个病灶,98个浸润性导管癌,1个黏液腺癌),比较按疗程随访的~1H-MRS结果(化疗前,一疗程后),观察分析胆碱共振峰的峰高、峰下面积及胆碱信噪比,以评估新辅助化疗疗效.所有病例均经手术病理证实.结果:①~1H-MRS可用于乳腺癌监测(成功率83.8%),乳腺癌可出现明显的胆碱复合峰,敏感度75.9%(63/83).②48个成功随访病灶中,8个治疗无效,40个有效;③比较治疗有效、无效组Cho峰高、峰下面积及信噪比,P<0.05,差异有统计学意义.④治疗有效组一疗程后Cho峰高、峰下面积及信噪比的变化有显著统计学意义,P<0.001,肿瘤Cho峰有下降趋势或部分消失;无效组Cho峰变化无统计学意义(P>0.05).结论:~1H-MRS可用于乳腺癌的诊断,并可在乳腺癌新辅助化疗早期通过Cho的变化,评价、预测新辅助化疗疗效,提供早期判断疗效的有价值信息.     

DWI对局部进展期乳腺癌新辅助化疗疗效评价的初步研究

目的:探讨磁共振扩散加权成像(DWI)对局部进展期乳腺癌新辅助化疗疗效评价以及作为预测因子的可行性.方法:根据10例乳腺癌化疗后退缩情况将肿瘤分成缓解和进展两组,比较两组化疗前后ADC值和DWI信号强度的变化,并评价治疗前ADC值与化疗结束肿瘤退缩变化的相关性.结果:无论是治疗前还是治疗后,ADC值和DWI信号强度在缓解组和进展组间差异均无显著性意义(P＞0.05),但缓解组治疗后ADC值升高,而进展组则降低,尤其在b=1000和2000 s/mm2时明显.b=1000 s/mm2时,肿瘤高活性区和低活性区对治疗反应比较显示,肿瘤高活性区ADC值较低,治疗后ADC值升高(1.195±0.230和1.371±0.295);而肿瘤低活性区ADC值较高,治疗后ADC值反而下降(1.632±0.241和1.312±0.297);与病理对照显示,治疗后肿瘤细胞蜕变,并伴有明显的胶元和纤维化形成.治疗前ADC值与治疗后肿瘤退缩呈负相关,当b取1000和2000 s/mm2时相关更明显,前者为r= -0.802,P=0.005,后者的r = -0.745,P=0.013.结论:DWI可以对局部进展期乳腺癌新辅助化疗疗效作评价,并能对治疗疗效作出预测.     

Breast-conserving surgery after chemotherapy: value of MDCT for determining tumor distribution and shrinkage pattern

OBJECTIVE: For this study, we investigated the usefulness of MDCT in assessing the extent of residual breast cancer after neoadjuvant chemotherapy. To ensure the success of breast-conserving surgery, we evaluated the usefulness of determining the tumor distribution before neoadjuvant chemotherapy and the shrinkage pattern after neoadjuvant chemotherapy. SUBJECTS AND METHODS: MDCT before and after neoadjuvant chemotherapy was performed in 46 consecutive patients with 47 locally advanced breast cancers. The distribution pattern of contrast enhancement on MDCT before neoadjuvant chemotherapy was classified into five categories: solitary lesion, grouped lesion (localized lesion with linear, spotty, or linear and spotty enhancement), separated lesion (multiple foci of contrast enhancement), mixed lesion (grouped lesion with multiple foci), and replaced lesion (diffuse contrast enhancement in whole quadrants). RESULTS: There was agreement between the MDCT assessment and pathologic findings in 44 (94%) of the 47 tumors. In the partial response group with nonreplaced lesions, MDCT revealed three shrinkage patterns: pattern 1a, concentric shrinkage without surrounding lesions; pattern 1b, concentric shrinkage with surrounding lesions; and pattern 2, shrinkage with residual multinodular lesions. Breast-conserving surgery was performed successfully in 14 patients including complete response cases that were detected on the basis of MDCT findings and partial response cases that were detected on the basis of observation of pattern 1 shrinkage. In all five patients with pattern 2 shrinkage, CT underestimated the residual tumor extent by more than 2 cm. CONCLUSION: MDCT classification of tumor distribution before neoadjuvant chemotherapy and of shrinkage patterns after neoadjuvant chemotherapy is important in the preoperative evaluation of patients undergoing breast-conserving surgery.     

应用1HMR波谱在新辅助化疗早期评估乳腺癌化疗效果的研究

目的 应用1HMRS评价化疗早期复合胆碱(tCho)浓度变化在早期评估乳腺癌新辅助化疗效果的价值.方法 搜集已确诊为乳腺癌(肿瘤T分期在T1c以上者)并进行新辅助化疗的患者20例.所有患者化疗前均进行乳腺病变穿刺活检,在化疗结束后均进行手术治疗.将手术病理切片与化疗前穿刺病理片比较,将患者分为化疗有效组和无效组.所有患者均在化疗前1周内及化疗第1疗程结束后3周内(化疗第二疗程开始前)各进行1次乳腺MRS检查.采用外参照定量法计算化疗前、后tCho浓度,并采用配对样本均数t检验比较2组统计学意义.采用秩和检验比较2组病灶大小的统计学意义.以病理作为金标准,用ROC曲线分析根据tCho浓度变化判断化疗有效的价值.结果 20例中化疗有效为16例,无效为4例.化疗有效组化疗前、后胆碱浓度分别为(4.24±3.09)、(1.13±1.14)mmol/L,两者差异有统计学意义(t=5.040,P<0.01),而无效组[(3.72±2.69)、(3.06±2.21)mmol/L]差异无统计学意义(t=1.785,P>0.05).2组间病灶大小变化值(中位数均为0 cm)差异无统计学意义(U=23.00,W=33.00,P=0.437).以病理作为金标准根据化疗前、后的tCho浓度变化评估化疗有效性的ROC曲线下而积为0.984.结论 MRS能在肿瘤大小发生改变之前即反映出肿瘤代谢的变化,从而能在新辅助化疗早期评估其疗效.     

Accuracy of MRI in the detection of residual breast cancer after neoadjuvant chemotherapy

OBJECTIVE: This study was undertaken to evaluate the ability of MRI to accurately show residual primary breast malignancy in women treated with neoadjuvant chemotherapy. MATERIALS AND METHODS: Twenty-one patients with locally advanced primary breast carcinoma underwent contrast-enhanced MRI before and after treatment with neoadjuvant anthracycline-based chemotherapy. For each patient, the maximum extent of the MRI abnormality was measured both before and after treatment. These measurements were subsequently compared with physical examination findings and histologic results to determine the ability of MRI to accurately reveal tumor extent after neoadjuvant chemotherapy. RESULTS: MRI after chemotherapy showed a correlation coefficient of 0.75 with histology, which was better than physical examination (r = 0.61). MRI underestimated the extent of residual tumor in two patients by more than 1 cm (including one false-negative examination), was within 1 cm in 12 of 21 patients, and overestimated tumor extent by more than 1 cm in seven of 21 patients. CONCLUSION: MRI can show residual malignancy after neoadjuvant chemotherapy better than physical examination, particularly in patients who have not had a complete clinical response to therapy.     

Early assessment of neoadjuvant chemotherapy by FEC-courses of locally advanced breast cancer using 99mTc-MIBI

Purpose: 
Response assessment at neoadjuvant (preoperative) chemotherapy of locally advanced breast cancer using clinical examination and mammography is insensitive. Mammoscintigraphy with ^99mTc-MIBI was studied for the prediction of response at such therapy before finishing the chemotherapy cycles. Material and Methods: 
Chemotherapy was given as repeated courses of 5-fluorouracil, epirubicin and cyclophosphamide (FEC). In 1 patient group (n = 23), the tumor uptake relative to surrounding breast tissue and lung tissue at SPECT examination after finishing neoadjuvant chemotherapy was compared with the examination made before chemotherapy. In another group (n = 30), a similar comparison after the first therapy cycle (mean 19 days) with a baseline examination was made. Histologic examination of the resected tumors was made. Results: 
After finishing chemotherapy, there was a strong reduction of the relative tumor activity, while there was no correlation with therapy effect as assessed by histology. After one therapy course, there was no significant reduction of the relative tumor uptake. Conclusion: 
Scintigraphy with ^99mTc-MIBI demonstrated the response after finished neoadjuvant chemotherapy of breast cancer using FEC-courses. It cannot be used to predict a therapy response after one therapy course.     

Invasive ductal breast carcinoma response to neoadjuvant chemotherapy: noninvasive monitoring with functional MR imaging pilot study

PURPOSE: To investigate if the extraction flow product (EFP), as determined on dynamic contrast material-enhanced magnetic resonance (MR) images, could be a potential marker of tumor response to neoadjuvant chemotherapy in patients with locally advanced breast cancer. MATERIALS AND METHODS: Fourteen women with proven breast cancer underwent MR imaging prior to and following neoadjuvant chemotherapy. Dynamic gradient-echo and echo-planar MR images were acquired before and after injection of gadopentetate dimeglumine. Precontrast T1s were measured before EFP maps were calculated by using a multicompartmental model. Mean EFP (EFPmean) and distribution analysis of EFP (EFPcount) were measured in tumors before and after neoadjuvant chemotherapy and were compared with tumor response at MR imaging. The significance of the difference in EFP values between the responders and nonresponders was calculated with a two-tailed Student t test. RESULTS: EFPmean after neoadjuvant chemotherapy in partial responders and nonresponders was 33 mL x 100 g-1 x min-1 +/- 9.8 and 54.2 mL x 100 g-1 x min-1 +/- 10.3, respectively (P <.005). EFPmean decreased after neoadjuvant chemotherapy in the responders and nonresponders by 37% +/- 30 and -5% +/- 35, respectively (P >.05). An increase in EFPmean values was observed only in nonresponders who received taxanes. For regimens without taxanes, EFPmean decreased regardless of the morphologic response. EFPcount decreased for all the responders by 77% +/- 33 and increased for all the nonresponders by 45% +/- 68 (P <.02). CONCLUSION: EFPcount appears to provide functional information regarding changes in tumor angiogenesis due to neoadjuvant chemotherapy. Functional MR imaging of the breast may be useful in monitoring tumor response to neoadjuvant chemotherapy.     

DWI在早期评估骨肉瘤新辅助化疗疗效中的应用价值

目的:探讨磁共振扩散加权成像(DWI)在早期评估骨肉瘤化疗疗效中的应用价值.方法:搜集行新辅助化疗的骨肉瘤患者11例,患者分别于新辅助化疗开始前、第1个化疗周期结束后、所有4个化疗周期结束后行常规MRI及DWI检查,检测骨肉瘤内水分子扩散及血液灌注变化情况,观察新辅助化疗过程中骨肉瘤形态、大小结构等方面的变化情况.结果...     

Evaluation of neoadjuvant therapy response of osteogenic sarcoma using FDG PET.

According to the current treatment protocol of the Cooperative Osteosarcoma Study (COSS), monitoring preoperative chemotherapy response and estimating grade of tumor regression in patients with osteosarcoma is mandatory before surgical removal of the tumor, particularly if a limb salvage procedure is intended. In addition, response to neoadjuvant chemotherapy is considered as an important prognostic indicator. The aim of this prospective study was to assess the usefulness of 2-(18F) fluoro-2-deoxy-D-glucose (FDG) PET in the noninvasive evaluation of neoadjuvant chemotherapy response in osteosarcoma. METHODS: In 27 patients with osteosarcoma, we determined tumor-to-background ratios (TBRs) of FDG uptake with PET, before and after neoadjuvant chemotherapy according to COSS 86c or COSS 96 protocols, respectively. We compared changes in glucose metabolism of osteosarcomas with the histologic grade of regression in the resected specimen, according to Salzer-Kuntschik, discriminating responders (grades I-III; n = 17) and nonresponders (grades IV-VI; n = 10). RESULTS: The decrease of FDG uptake in osteosarcomas expressed as a ratio of posttherapeutic and pretherapeutic TBRs showed a close correlation to the amount of tumor necrosis induced by polychemotherapy (P < 0.001; Spearman). With a TBR ratio cutoff level of 0.6, all responders and 8 of 10 nonresponders could be identified by PET. In addition, lung metastases of osteosarcoma were detected with FDG PET in 4 patients. CONCLUSION: FDG PET provides a promising tool for noninvasive evaluation of neoadjuvant chemotherapy response in osteosarcoma. This could imply consequences for the choice of surgical strategy, because a limb salvage procedure cannot be recommended in patients nonresponsive to preoperative chemotherapy unless wide surgical margins can safely be achieved.     

Blood flow and metabolism in locally advanced breast cancer: relationship to response to therapy.

Locally advanced breast cancer (LABC) is commonly treated with neoadjuvant chemotherapy followed by definitive surgery. The factors influencing the response of LABC to presurgical chemotherapy are incompletely understood. To characterize in vivo tumor biology in patients with LABC, we measured pretherapy blood flow and glucose metabolism in LABC, compared measurements with clinical and pathologic parameters, and examined blood flow and response to subsequent neoadjuvant chemotherapy. METHODS: Thirty-seven patients with newly diagnosed LABC underwent (18)F-FDG and (15)O-water PET imaging. Thirty-one of these patients underwent neoadjuvant chemotherapy, and response was evaluated by serial measurements of tumor size and pathologic examination after definitive surgery after chemotherapy. Tumor metabolism was estimated from graphic analysis of dynamic (18)F-FDG studies and was expressed as the metabolic rate of (18)F-FDG (MRFDG). Blood flow was estimated from dynamic images after bolus (15)O-water injection using a 1-compartment model. Tumor blood flow and metabolism were compared with clinical and pathologic parameters and with response to chemotherapy. RESULTS: Both blood flow and metabolism were significantly higher in tumor than in normal breast. Tumor blood flow and metabolism were correlated but highly variable. There were weak associations of metabolism with patient age and tumor grade and of blood flow with estrogen receptor status. There was a statistically significant trend for patients with a high MRFDG to have a poorer response to therapy (P = 0.001). Response was not significantly correlated with any other parameters. A low ratio of MRFDG to blood flow was the best predictor of macroscopic complete response (CR) (P = 0.02 vs. non-CR). Preliminary analysis of patient follow-up showed the ratio of MRFDG to blood flow to also be predictive of disease-free survival. CONCLUSION: Despite uniformly large tumor size, blood flow and metabolism in LABC are highly variable. High glucose metabolism predicts a poor response to neoadjuvant chemotherapy, and low MRFDG relative to blood flow is a predictor of CR. Further work is needed to elucidate the biologic mechanisms underlying these findings.     

新辅助化疗联合腹腔镜手术治疗进展期胃癌的临床研究

目的评价术前新辅助化疗联合腹腔镜手术治疗进展期胃癌的疗效。方法应用改良FOLFOX4方案对42例进展期胃癌患者施行术前新辅助化疗,然后行腹腔镜手术治疗。结果全组患者各种化疗毒副反应较低,均可耐受化疗。新辅助化疗后23例(54.8%)肿瘤再分期降低,临床完全缓解(CR)6例(14.3%),部分缓解(PR)26例(61.9%),疾病稳定(SD)6例(14.3%),进展(PD)4例(9.5%),总有效率(RR)为76.2%(32/42)。疗程结束后1～2周行腹腔镜手术治疗,37例(88.1%)切除肿瘤,25例(59.5%)获根治性切除,8例(19.0%)相对根治切除,4例(9.5%)行姑息性手术;5例(11.9%)仅行腹腔镜探查未切除肿瘤。结论术前新辅助化疗联合腹腔镜手术治疗进展期胃癌疗效显著,有效率高,显著提高了手术切除率且不良反应轻,耐受性良好,并可发挥腹腔镜手术创伤小、恢复快的微创优势。