Objective To determine the influence of combinative assessment of 64 multi-slice spiral computer tomography (MSCT) and serum amyloid A protein (SAA) on the selection of operative procedures of upper rectal cancer in multi-disciplinary team. Methods Prospectively enrolled 110 patients, who were diagnosed definitely as upper rectal cancer (distance of tumor to the dentate line gt;7 cm) at West China Hospital of Sichuan University from August 2007 to October 2008, randomly assigned into two groups. In one group named MSCT+SAA group, both MSCT and SAA combinative assessment were made for the preoperative evaluation. In another group named MSCT group, only MSCT was made preoperatively. Then, the pooled data were analyzed for the correlative relationship between the choice of surgery strategy and clinicopathologic factors. Furthermore, the preoperative staging and predicted operative procedures were compared with postoperative pathologic staging and practical operative procedures, respectively. Results According to the criteria, 106 patients with upper rectal cancer were randomly assigned into MSCT+SAA group (n=52) and MSCT group (n=54). The baseline characteristics of two groups were statistically identical. When analyzing the proportion of multiple clinicopathologic factors in different operative procedures of upper rectal cancer, there were statistical differences in the preoperative N staging (P=0.003), M staging (P=0.022), TNM staging (P=0.003), serum level of SAA (P=0.005) and general category of tumor (P=0.027). For MSCT+SAA group the accuracies of preoperative staging T, N, M and TNM were 84.6%, 86.5%, 100% and 86.5%, respectively; For MSCT group the corresponding rates were 83.3%, 2.9%, 100% and 64.8%, respectively. There were statistically significant differences accuracies of preoperative N staging and TNM staging (P=0.005, P=0.009, respectively) in two groups. There was a statistically significant difference of the accuracy of prediction to operative procedures in two groups (96.2% vs. 81.5%, P=0.017). Conclusion Combinative assessment of 64 MSCT and SAA could improve the accuracy of preoperative staging, and thus provide higher predictive coincidence rate to operative procedures for surgeon.
Objective To evaluate the diagnostic value of analyzing the pattern of gallbladder wall enhancement on MDCT to identify the different causes of acute cholecystitis. Methods In January 2009 to December 2012， 169 patients diagnosed with acute cholecystitis caused by various pathologic conditions were performed MDCT scans， the images of portal venous phase and clinical data were retrospectively reviewed by two blinded radiologists. There were 146 cases in non-hepatopathy cholecystitis group and 23 cases in hepatopathy cholecystitis group. The other 5 normal gallbladder cases diagnosed by MDCT scans were retrospectively reviewed as contrast group. Using five patterns according to the enhancement pattern of flat gallbladder wall thickening on MDCT. The study cases were then divided into five patterns and the thickness of the mucous membrane were measured. The occurrence rate of each pattern and the thickness of the mucous membrane between the groups were compared respectively. Results In the non-hepatopathy cholecystitis group， there were typeⅡin 102 cases （69.9%）， typeⅢin 5 cases （3.4%）， typeⅣ in 30 cases （20.5%）， and typeⅤ in 9 cases （6.2%）. In the hepatopathy cholecystitis group， there were typeⅡin 2 cases （8.7%）， typeⅢ in 11 cases （47.9%）， typeⅣin 5 cases （21.7%）， and typeⅤin 5 cases （21.7%）. The occurrence rate of typeⅡin the non-hepatopathy cholecystitis group was significialtly higher than that in the hepatopathy cholecystitis group （P＜0.005）. The occurrence rate of typeⅢ and typeⅤ in the hepatopathy cholecystitis group were significialtly higher than those in the non-hepatopathy cholecystitis group（P＜0.005， P＜0.05）. The occurrence rate of type Ⅳ between the two groups had no significant difference （P＞0.05）. TypeⅠonly present in the contrast group. The non-hepatopathy group’s mean mucous membrane thickness was （2.61±1.30） mm ， which was thicker than the hepatopathy group’s （2.02±0.52） mm（t=2.22， P＜0.05）. Conclusion Analyzing the enhancement pattern of a thickened gallbladder wall on MDCT is helpful in identifying the causes of acute cholecystitis， and the gallbladder perforation or not.
ObjectiveTo analyze and conclude CT and MRI imaging features of ectopic pancreas in gastrointestinal tract so as to improve the understanding of the features.MethodsThe clinical, imaging, and pathological data of 12 patients with ectopic pancreas in the gastrointestinal tract confirmed by the pathology in the Sichuan Provincial People’s Hospital from November 2016 to June 2019 were retrospectively analyzed. The characteristics of image presentation were summarized.Results① The anatomical distribution: all patients had a single lesion. Of the 12 cases, 6 cases located in the gastric body lesser curvature, 3 cases located in the gastric angle, 1 case located in the posterior wall of gastric antrum, 1 case occurred in the upper jejunum, and 1 case occurred in the terminal ileum; 8 cases located in the submucosa, 2 cases located in the submucosa and muscular layer simultaneously, 1 case located in the submucosa, muscular and serous layer simultaneously, and 1 case located in the muscular layer. ② Size of the lesions: the maxium dimensions of the lesions were all 3 cm or less, and the long axes of the lesions were parallel to the gastrointestinal tract wall in 10 cases. ③ The internal characteristics: the results of 9 of 11 cases showed the isodensity compared to main pancreas on the plain CT scan. The results of 8 patients with enhanced CT showed the moderate to obvious enhancement, with 2 cases showed the slightly enhanced flaky or tube-like foci. In the arterial phase and portal venous phase, 6 cases showed the isodensity compared to main pancreas respectively. The result of MRI in 1 patient showed the isointensity compared to main pancreas on the plain scan and obviously heterogeneous enhancement.ConclusionCT and MRI could provide some information about location, size, and internal density or intensity of ectopic pancreas, and could be helpful for diagnosis.
【摘要】 目的 探讨利用术前CT多平面重建（MPR）图像上钉道设计与术中确定枢椎峡部中心，指导后路寰枢经关节螺钉内固定徒手置钉的价值。 方法 选取成人头颈尸体标本9具，及寰枢关节不稳患者5例，螺旋CT扫描，取后路寰枢经关节螺钉内固定的理想钉道（经枢椎峡部中心点）所在平面重建并设计个体化钉道，确定安全的置钉范围。参考术前钉道设计与术中确定枢椎峡部中心，徒手行后路寰枢经关节螺钉固定。术后对实际钉道CT多平面重建，分析徒手实际置钉情况。 结果 后路寰枢经关节螺钉固定共28侧，术中徒手操作顺利，无重要血管神经损伤。手术实际钉道均在术前设计钉道的安全范围内。5例患者寰枢椎间术后较术前存在相对位移变化。 结论 根据螺旋CT MPR图像设计的个体化后路寰枢经关节螺钉内固定钉道，结合术中枢椎峡部中心显露，可指导临床安全地徒手置钉。【Abstract】 Objective To explore the clinical value of the free-hand technique on making the screw path of posterior atlantoaxial transarticular screw fixation, which guided in accordance with the preoperative design of the screw trajectory in spiral CT multilevel reconstruction (MPR) imaging and intra-operative exposure of the center of C2 isthmus. Methods The cervical spine segments of 9 human cadavers and 5 patients with atlantoaxial instability were scanned with spiral computed tomography. Then the CT MPR images of ideal screw trajectory of posterior atalanto-axial transarticular screw reconstructed through the central point of C2 isthmus were used for plotting individual safe screw trajectory. According to preoperative designing of the individual screw trajectory and intraoperative exposure of the center of C2 isthmus, free-hand operation made the transarticular screw path of posterior atlantoaxial screw fixation. Postoperative CT MPR image was used to analyze the actual screw trajectory in atlantoaxial complex, as well. Results The transarticular screws were inserted atlantoaxial joints in 28 sides. The free-hand operation of screw placement was successful, and no screw misplacement or major neurovascular injury was found. There was relative displacement between the atlas and axial vertebrae in 5 patients. Conclusion The free-hand technique of posterior atlantoaxial transarticular screw placement is reliable and safe which refers the preoperative individual screw trajectory designed by CT MPR image and intraoperative exposure of the center of C2 isthmus.
目的 探讨急性重症胰腺炎不同时期的治疗方式，观察治疗效果以及治疗前后的临床表现。 方法 回顾性分析2006年1月-2009年1月收治的34例急性重症胰腺炎患者的临床资料，患者给予内科规范化治疗，并对比治疗前、后的APACHEⅡ评分、主要的实验室检查指标以及CT检查表现。 结果 31例治愈，2例中途转外科治疗，1例死亡。所有患者治疗后APACHEⅡ评分较治疗前减小（Plt;0.01），治疗后血清淀粉酶和白细胞计数较治疗前明显降低（Plt;0.05），而治疗后短期内CT检查表现无明显变化。 结论 内科规范化治疗能有效地治疗急性重症胰腺炎，适当的肠内外营养和预防性使用抗生素可有效地减少急性重症胰腺炎并发症的发生。APACHE-Ⅱ评分可作为判断急性重症胰腺炎患者预后的指标。
Objective To determine the influence and significance of combinative assessment of 64 multi-slice spiral computed tomography (MSCT) with serum amyloid A protein (SAA) or C-reactive protein (CRP) on the selection of operative procedures of rectal cancer under the multi-disciplinary team. Methods Prospectively enrolled patients diagnosed definitely as rectal cancer at West China Hospital of Sichuan University from February to August 2009 were randomly assigned into two groups. In one group named MSCT+SAA group, both 64 MSCT and SAA combinative assessment were made for the preoperative evaluation. In another group named MSCT+CRP group, both MSCT and CRP combinative assessment were made for preoperative evaluation. Furthermore, the preoperative staging and predicted operation procedures were compared with postoperative pathologic staging and practical operation procedures, respectively, and the relationship between the choice of operation procedures and clinicopathologic factors was analyzed. Results All 165 patients were randomly assigned into MSCT+SAA group (n=83) and MSCT+CRP group (n=82). The baseline characteristics of two groups were statistically similar (Pgt;0.05). For MSCT+SAA group, the accuracies of preoperative staging T, N, M and TNM were 74.7%， 68.7%, 100% and 66.3%, respectively. For MSCT+CRP group, the accuracies of preoperative staging T, N, M and TNM were 72.0%, 86.6%, 100% and 81.7%, respectively. There were statistically significant differences in the accuracies of N staging and TNM staging between two groups (P＜0.05). However, there was no statistically significant difference of the accuracy of prediction to operative procedures between two groups (90.4% vs. 95.1%, Pgt;0.05). The pathological T staging (P＜0.001), N staging (P＜0.001), TNM staging (P＜0.001), preoperative serum level of SAA (P=0.010), serum level of CRP (P=0.042), and distance of tumor to the dentate line (P=0.011) were associated with the operative procedures. Conclusion Combinative assessment of MSCT+CRP could improve the accuracy of preoperative staging and operative procedures prediction, which may be superior to MSCT+SAA.
Objective We sought a good understanding of the current role of computed tomography (CT) in the diagnosis of small bowel obstruction (SBO).Methods We looked for the best evidence on computed tomography for diagnosing small bowel obstruction by searching MEDLINE/PubMed (1978-April, 2006), SUMsearch (1978-April, 2006), CNKI (1978-April, 2006) and critically appraised the evidence. Results There was powerful evidence supporting the efficacy of computed tomography in the diagnosis of small bowel obstruction. Given the current evidence together with our clinical experience and considering the patient and his family members, values and preferences, computed tomography was done. We confirmed the diagnosis of strangulating small bowel obstruction, which needed immediate operation. Conclusions Computed tomography is a very useful tool for the diagnosis of small bowel obstruction with high sensibility and specificity.
Objective To determine the influence of combinative assessment of 64 multi-slice spiral computer tomography (MSCT) and serum amyloid A protein (SAA ) on the selection of operative procedures in lower rectal cancer.MethodsProspectively enrolled 130 patients diagnosed definitely as lower rectal cancer (distance of tumor to the dentate line ≤7 cm) at West China Hospital of Sichuan University from July 2007 to September 2008 were randomly assigned into two groups with 65 participants, respectively. In one group named MSCT+SAAgroup, both 64 MSCT and SAA combinative assessment were made for the preoperative evaluation. In another group named MSCT group, only the preoperative MSCT was made. Furthermore, the preoperative staging and predicted operation procedures were compared with postoperative pathologic staging and practical operation program, respectively.ResultsAccording to the criteria, 119 patients with colorectal cancer were actually included into MSCT+SAA group (n=58) and MSCT group (n=61). The baselines characteristics of two groups were basically identical. For MSCT+SAAgroup, the accuracies of preoperative staging T, N, M and TNM were 89.66%, 79.31%, 100% and 77.59%, respectively; For MSCT group, the corresponding rates were 86.89%, 70.49%, 100% and 65.57%, respectively. There was a statistically significant difference of the accuracy of prediction to operative procedures in two groups (93.10% vs. 80.33%, P=0.041). The clinical staging (P=0.001), preoperative T staging (P=0.000), M staging (P=0.016), TNM staging (P=0.013) and serum level of SAA (P=0.029) were related to the selection of operative procedures when analyzing the relationship between the operative procedures and multiple clinicopathologic factors in lower rectal cancer. ConclusionCombinative assessment of 64 MSCT and SAA could improve the accuracy of preoperative staging, thus provide higher predictive coincidence rate to operative procedures for surgeon.
Objective To establish the optimal morphological criteria combined with fibrinogen level for evaluation of lymph node metastasis in colorectal cancer. Methods A consecutive series of 690 patients who underwent curative surgery for colorectal cancer, were examined by abdominopelvic enhanced multi-slice spiral computed tomography (MSCT) scan. If regional lymph nodes appeared, the maximal long-axis diameter (MLAD), maximal short-axis diameter (MSAD), and axial ratio (MSAD/MLAD) were recorded. At each lymph node size cut-off value, the following were calculated: accuracy, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV). Moreover, preoperative plasma level of fibrinogen was retrospectively examined to identify metastatic or inflammatory lymph node combined with MSCT image. Both modalities, MSCT plus fibrinogen and MSCT alone, were compared based on the pathologic findings. Results The study population consisted of 100 patients with regional lymph nodes show. No significant difference was found between metastatic and inflammatory lymph nodes in imaging characteristics (Pgt;0.05). The best cut-off value of MSAD was 6 mm for lymph node metastasis with the sensitivity of 46.8%, specificity of 68.4%, accuracy of 55.0%, PPV of 70.7% and NPV of 44.1%. The best cut-off value of MLAD was 8 mm with the sensitivity of 43.5%, specificity of 63.2%, accuracy of 51.0%, PPV of 65.9% and NPV of 40.7%. Using hyperfibrinogenemia (FIB ≥3.5 g/L) to identify small metastatic lymph node, of which MSAD lt;6 mm or MLAD lt;8 mm, showed statistical diagnostic value (Kappa=0.256, P=0.047). Compared with MSAD (6 mm) alone, MSAD (6 mm) combined with hyperfibrinogenemia had a higher sensitivity (79.0% vs. 46.8%, Plt;0.001), but a similar accuracy (66.0% vs. 55.0%, Pgt;0.05) and a lower specificity (44.7% vs. 68.4%, P=0.037). MLAD (8 mm) combined with hyperfibrinogenemia led to a greater diagnostic value in sensitivity (80.6% vs. 43.5%, Plt;0.001) and accuracy (66.0% vs. 51.0%, P=0.031) than MLAD (8 mm) alone, with a no-significantly decreasing specificity (42.1% vs. 63.2%, Pgt;0.05). Conclusions This present study recommend MSAD ≥6 mm or MLAD ≥8 mm as the optimal criteria for preoperative N staging in colorectal cancer. Moreover, the sensitivity and even accuracy could be improved by combining hyperfibrinogenemia for lymph node metastasis identification.
Objective To determine the role of multi-slice spiral computed tomography (MSCT) compared with transrectal ultrasound (TRUS) in preoperative staging of rectal cancer. Methods Patients with rectal cancer from January to May 2009 in Department of Anal-Colorectal Surgery of West China Hospital were enrolled. All patients were preoperatively examined by both MSCT and TRUS for T and N staging, which were compared with postoperative pathological findings. Results The study population consisted of 81 patients. Regarding depth of tumor invasion, the accuracy of TRUS (88.89%) was not significantly higher than that of MSCT (77.78%), P=0.168. Regarding lymph node metastasis, the result of MSCT was more accurate than that of TRUS (66.67% vs. 48.15%, P=0.034). Conclusions Although TRUS remains the advantages in evaluating local invasion, the gap between MSCT and TRUS are significantly diminished. MSCT is superior to TRUS in evaluation of lymph node metastasis, however, further improvement on the diagnostic accuracies would be warranted in both modalities.