Gastric cancer ranks fifth as the most common cancer and third as the leading cause of death worldwide.Risk factors include advancing age,low-fiber diets,high salt intake and Helicobacter pylori infection.Diagnosis re...Gastric cancer ranks fifth as the most common cancer and third as the leading cause of death worldwide.Risk factors include advancing age,low-fiber diets,high salt intake and Helicobacter pylori infection.Diagnosis relies on histological examination following endoscopic biopsy with staging accomplished through various imaging modalities.Early gastric cancer is primarily managed via endoscopic resection,while non-early operable cases typically undergo surgery.Advanced cases are addressed through sequential chemotherapy lines,with initial treatment usually comprising a platinum and fluoropyrimidine combination.Linitis plastica(LP)is a rare,aggressive form of gastric cancer characterized by diffuse infiltration of the gastric wall,resulting in poor outcomes even after curative resection.The absence of a standardized definition contributes to uncertainty regarding the precise incidence of these tumors.LP is often diagnosed at advanced stages,with a reported median survival rate of approximately 4%-29%,despite“curative resection”.Its distinctive biological behavior includes perineural invasion,nodal metastasis,and peritoneal dissemination.The bleak prognosis for LP patients partly stems from delayed diagnosis and its aggressive biological nature,posing significant challenges for clinical management.Currently,no specialized treatment strategy exists for LP,and clinical approaches typically align with those used for general gastric cancer treatment.Surgical resection is the primary treatment,but the optimal surgical approach remains contentious.Recent studies have investigated the efficacy of neoadjuvant chemotherapy and radiotherapy in improving survival outcomes for LP patients.However,controversies persist regarding the role of adjuvant chemotherapy and postoperative radiotherapy.LP requires a multidisciplinary approach and personalized treatment strategies tailored to each patient’s condition.Further research is needed to elucidate optimal therapeutic interventions and improve outcomes for LP patients.展开更多
Linitis plastica is a rare condition showing circumferentially infiltrating intramural anaplastic carcinoma in a hollow viscus, resulting in a tissue thickening of the involved organ as constricted, inelastic, and rig...Linitis plastica is a rare condition showing circumferentially infiltrating intramural anaplastic carcinoma in a hollow viscus, resulting in a tissue thickening of the involved organ as constricted, inelastic, and rigid. While most secondary rectal linitis plastica(RLP) is caused by metastasis from stomach, breast, gallbladder, or bladder cancer, we report an extremely rare and unique case of secondary RLP due to prostate cancer with computed tomography(CT) and magnetic resonance imaging(MRI) findings, including diffusion weighted imaging(DWI). A 78-year-old man presented with approximately a 2-mo history of constipation and without cancer history. On sigmoidoscopy, there was a luminal narrowing and thickening of rectum with mucosa being grossly normal in its appearance. On contrast-enhanced CT,marked contrast enhancement with wall thickening of rectum was noted. On pelvic MRI, rectal wall thickening showed a target sign on both T2-weighted imaging and DWI. A diffuse infiltrative lesion was suspected in the prostate gland based on low signal intensity on T2-weighted imaging and restricted diffusion. A transanal full-thickness excisional biopsy revealed metastasis from a prostate adenocarcinoma invading the submucosa to the muscularis propria consistent with metastatic RLP. We would like to emphasize the CT and MRI findings of metastatic RLP due to prostate cancer.展开更多
The objective of this study was to investigate the endosonographic appearance of gastric linitis plastica(GLP) and to study the usefulness of endoscopic ultrasonography(EUS) for the T and N staging of GLP.EUS examinat...The objective of this study was to investigate the endosonographic appearance of gastric linitis plastica(GLP) and to study the usefulness of endoscopic ultrasonography(EUS) for the T and N staging of GLP.EUS examinations of 55 patients with histologically proven GLP were retrospectively studied.In all patients,EUS showed that lesions involved at least one-third of the circumference of the stomach.Based on the findings of the EUS,the 55 patients were divided into two groups.There were 32(58.2%) patients in the first group.EUS of this group showed that the five sonographic layers had disappeared and had been replaced by a hypoechogenic thickening of the gastric wall.There were 23(41.8%) patients in the second group.EUS of this group showed that the first three sonographic layers were blurred and thickened,and the fourth layer was significantly thickened.The full thickness of the gastric wall was significantly thicker in first than in the second group of patients(P<0.01).The incidence of perigastric lesions was significantly higher in the first than in the second group of patients(P<0.01).Results for the 15 patients following preoperative EUS were compared postoperatively with histopathologic findings for T and N staging.The overall diagnostic accuracy of the T stage was 73.3% and of the N stage was 60.0%.In eight patients,we used EUS to assess a therapeutic response.No response was observed in five patients and a partial response in three.EUS images of GLP are characteristic.EUS is helpful in diagnosing GLP and for assessing the T and N stages.展开更多
BACKGROUND Gastric linitis plastica(GLP)is a subset of gastric cancer with a poor prognosis.It is difficult to obtain a definitive diagnosis by endoscopic mucosal biopsies,and the usefulness of an endoscopic ultrasono...BACKGROUND Gastric linitis plastica(GLP)is a subset of gastric cancer with a poor prognosis.It is difficult to obtain a definitive diagnosis by endoscopic mucosal biopsies,and the usefulness of an endoscopic ultrasonography-guided fine-needle biopsy(EUSFNB)for GLP has been recently reported.Meanwhile,autoimmune diseases are occasionally known to coexist with malignant tumors as paraneoplastic syndrome.We herein report the usefulness of an EUS-FNB for detecting GLP and the possibility of paraneoplastic syndrome coexisting with GLP.CASE SUMMARY An 81-year-old man was admitted to our hospital for a 1-mo history of epigastric pain that increased after eating.His laboratory data revealed high levels of serum carbohydrate antigen 19-9 and immunoglobulin-G4.Endoscopic examinations showed giant gastric folds and reddish mucosa;however,no epithelial changes were observed.The gastric lumen was not distensible by air inflation,suggesting GLP.Computed tomography showed the thickened gastric wall,the diffuse enlargement of the pancreas,and the peripancreatic rim,which suggested autoimmune pancreatitis(AIP)coexisting with GLP.Because the pathological findings of the endoscopic biopsy showed no malignancy,he underwent an EUSFNB and was diagnosed with GLP.He received chemotherapy for unresectable gastric cancer due to peritoneal metastasis,after which both the gastric wall thickening and diffuse enlargement of the pancreas were improved.CONCLUSION An EUS-FNB for GLP with a negative endoscopic biopsy is useful,and AIP may develop as a paraneoplastic syndrome.展开更多
Aim: We report a rare case of gastric linitis plastica revealed by vertebral metastases without another digestive dissemination. Case presentation: The Benin native woman was hospitalized in rheumatology for inflammat...Aim: We report a rare case of gastric linitis plastica revealed by vertebral metastases without another digestive dissemination. Case presentation: The Benin native woman was hospitalized in rheumatology for inflammatory back pain without another signs. Rx ray showed vertebra metastasis. In the etiologic research, gastroscopy showed an infiltrating lesion of the antral area, indicating gastric linitis which was confirmed by biopsy. Short and medium-term evolution was favourable, characterized by a complete disappearance of the pains and a good physical condition. Conclusion: Vertebral metastases can reveal digestive cancer, although human gut is not among the most bone metastatic cancers.展开更多
BACKGROUND Secondary rectal linitis plastica(RLP)from prostatic adenocarcinoma is a rare and poorly understood form of metastatic spread,characterized by a desmoplastic response and concentric rectal wall infiltration...BACKGROUND Secondary rectal linitis plastica(RLP)from prostatic adenocarcinoma is a rare and poorly understood form of metastatic spread,characterized by a desmoplastic response and concentric rectal wall infiltration with mucosal preservation.This complicates endoscopic diagnosis and can mimic gastrointestinal malignancies.This case series underscores the critical role of magnetic resonance imaging(MRI)in identifying the distinct imaging features of RLP and highlights the importance of considering this condition in the differential diagnosis of patients with a history of prostate cancer.CASE SUMMARY Three patients with secondary RLP due to prostatic adenocarcinoma presented with varied clinical features.The first patient,a 76-year-old man with advanced prostate cancer,had rectal pain and incontinence.MRI showed diffuse prostatic invasion and significant rectal wall thickening with a characteristic"target sign"pattern.The second,a 57-year-old asymptomatic man with elevated prostatespecific antigen levels and a history of prostate cancer exhibited rectoprostatic angle involvement and rectal wall thickening on MRI,with positron emission tomography/computed tomography PSMA confirming the prostatic origin of the metastatic spread.The third patient,an 80-year-old post-radical prostatectomy,presented with refractory constipation.MRI revealed a neoplastic mass infiltrating the rectal wall.In all cases,MRI consistently showed stratified thickening,concentric signal changes,restricted diffusion,and contrast enhancement,which were essential for diagnosing secondary RLP.Biopsies confirmed the prostatic origin of the neoplastic involvement in the rectum.CONCLUSION Recognizing MRI findings of secondary RLP is essential for accurate diagnosis and management in prostate cancer patients.展开更多
AIM To report on a more accurate diagnostic possibility offered by endoscopic ultrasound-guided cutting of holes and deep biopsy (EUS-CHDB) for pathologic diagnosis of gastric infiltrative tumors and gastrointestinal ...AIM To report on a more accurate diagnostic possibility offered by endoscopic ultrasound-guided cutting of holes and deep biopsy (EUS-CHDB) for pathologic diagnosis of gastric infiltrative tumors and gastrointestinal submucosal tumors. METHODS Ten consecutive patients who were suspected of having gastric invasive tumors or gastrointestinal submucosal tumors underwent EUS-CHDB with a novel vertical diathermic loop. We reviewed their medical data and analysed the effectiveness and safety of this new method. The final diagnosis was based on the surgical pathology or clinical/imaging follow-up. RESULTS EUS-CHDB was performed successfully in all the ten patients. Neither severe haemorrhage nor perforation occurred in any patient. Among the ten patients, there were three cases of gastric linitis plastica, one case of gastric lymphoma, five cases of gastrointestinal stromal tumors (GISTs), and only one case of chronic non-atrophic gastritis. That is, nine (90%) of the cases CONCLUSION EUS-CHDB may be a technically feasible and safe option for patients with gastric infiltrative tumors or gastrointestinal submucosal tumors. EUS-CHDB may be used as a remedial or even preferred biopsy method for submucosal lesions.展开更多
Aim： To discuss important points on medical history, preoperative evaluation, real expectations, and selection of the appropriate surgical procedure to improve patient satisfaction after surgical procedures for Peyro...Aim： To discuss important points on medical history, preoperative evaluation, real expectations, and selection of the appropriate surgical procedure to improve patient satisfaction after surgical procedures for Peyronie＇s disease. Methods： Recent advances in approaches to Peyronie＇s disease are discussed based on the literature and personal experiences. Issues concerning surgical indication, patient selection, surgical techniques, and grafting are discussed. Lengthening procedures on the convex side of the penile curvature by means of grafting offer the best possible gain from a reconstruction standpoint. Penile rectification and rigidity are required to achieve a completely functional penis. Most patients experience associated erectile dysfunction （ED）, and penile straightening alone may not be enough to restore complete function. Twenty-five patients were submitted to total penile reconstruction on length and girth with concomitant penile prosthesis implant. The maximum length restoration was possible and limited by the length of the dissected neurovascular bundle. The mean age was 55.4 years （32-69 years） and the mean angle of curvature 74.2± 22.4° （0-100°）. Pericardial grafting was used to cover the defect. The mean follow-up time was 11.2 ± 5.9 months （3-22 months）. Results： Mean functional penile length gain was 3.40 ＋ 0.73 cm （2-5 cm）. Penile prosthesis maintained the penis straight. No infections occurred. Sexual intercourse was restored in all patients and all reported recovered self-esteem. Conclusion： Improving patient satisfaction with the surgical treatment includes proper preoperative evaluation on stable disease, penile shortening, vascular and erectile status, patient decision and selection as well as extensive discussion on surgical technique for restoring functional penis （length and rigidity）. Length and girth restoration is very important for self-esteem and patient satisfaction.展开更多
Based on the Plastica theory (see ref. [12]), the large deflection of an elastic-perfectly plastic cantilever subjected to an inclined concentrated force at its tip, before the unloading in the plastic region occurs, ...Based on the Plastica theory (see ref. [12]), the large deflection of an elastic-perfectly plastic cantilever subjected to an inclined concentrated force at its tip, before the unloading in the plastic region occurs, is analyzed in this paper. The emphasis of the analysis is put on the effects of the angle of inclination of the concentrated force upon the deformed shape, the load-deflection relationship and the length of the plastic region. Both analytical and computed results are given.展开更多
目的:构建皮革胃患者术后预后的列线图预测模型,并验证其准确性。方法:收集2008年12月—2014年9月共203例在福建医科大学附属协和医院胃外科行R_0切除的皮革胃患者的临床病理资料。根据Cox逻辑回归分析确定的独立预后因素,用R软件建立...目的:构建皮革胃患者术后预后的列线图预测模型,并验证其准确性。方法:收集2008年12月—2014年9月共203例在福建医科大学附属协和医院胃外科行R_0切除的皮革胃患者的临床病理资料。根据Cox逻辑回归分析确定的独立预后因素,用R软件建立列线图预测模型,并分析所建模型对皮革胃患者预后预测的准确度。结果:全组患者中,男152例,女51例,其平均年龄为60.3(21～89)岁;II期患者25例(12.3%),III期患者178例(87.7%);中位随访时间38(2～111)个月;3、5年总体生存率分别为31.2%、18.7%。多因素分析结果示,BMI(P=0.006)、肿瘤细胞分化程度(P=0.042)、T分期(P=0.032)、N分期(P=0.032)、ASA评分(P=0.016)是预后的独立危险因素。根据以上独立危险因素建立列线图,并根据列线图的得分将患者进行危险分组分析发现,高危组(>16分)、中危组(>8～16分)和低危组(≤8分)患者的生存差异有统计学意义(P<0.001)。列线图的线性χ~2、阳性似然比、赤池信息量值准则均优于第七版AJCC-TNM分期系统(68.99 vs. 58.58、70.18 vs. 58.36、1 473.38 vs. 1 485.04)。结论:所建立的列线图模型能有效预测皮革胃患者的术后总体生存率,其预测准确度优于第7版AJCC-TNM分期系统,但该结果仍需进一步通过大宗的病例和多中心研究验证。展开更多
文摘Gastric cancer ranks fifth as the most common cancer and third as the leading cause of death worldwide.Risk factors include advancing age,low-fiber diets,high salt intake and Helicobacter pylori infection.Diagnosis relies on histological examination following endoscopic biopsy with staging accomplished through various imaging modalities.Early gastric cancer is primarily managed via endoscopic resection,while non-early operable cases typically undergo surgery.Advanced cases are addressed through sequential chemotherapy lines,with initial treatment usually comprising a platinum and fluoropyrimidine combination.Linitis plastica(LP)is a rare,aggressive form of gastric cancer characterized by diffuse infiltration of the gastric wall,resulting in poor outcomes even after curative resection.The absence of a standardized definition contributes to uncertainty regarding the precise incidence of these tumors.LP is often diagnosed at advanced stages,with a reported median survival rate of approximately 4%-29%,despite“curative resection”.Its distinctive biological behavior includes perineural invasion,nodal metastasis,and peritoneal dissemination.The bleak prognosis for LP patients partly stems from delayed diagnosis and its aggressive biological nature,posing significant challenges for clinical management.Currently,no specialized treatment strategy exists for LP,and clinical approaches typically align with those used for general gastric cancer treatment.Surgical resection is the primary treatment,but the optimal surgical approach remains contentious.Recent studies have investigated the efficacy of neoadjuvant chemotherapy and radiotherapy in improving survival outcomes for LP patients.However,controversies persist regarding the role of adjuvant chemotherapy and postoperative radiotherapy.LP requires a multidisciplinary approach and personalized treatment strategies tailored to each patient’s condition.Further research is needed to elucidate optimal therapeutic interventions and improve outcomes for LP patients.
文摘Linitis plastica is a rare condition showing circumferentially infiltrating intramural anaplastic carcinoma in a hollow viscus, resulting in a tissue thickening of the involved organ as constricted, inelastic, and rigid. While most secondary rectal linitis plastica(RLP) is caused by metastasis from stomach, breast, gallbladder, or bladder cancer, we report an extremely rare and unique case of secondary RLP due to prostate cancer with computed tomography(CT) and magnetic resonance imaging(MRI) findings, including diffusion weighted imaging(DWI). A 78-year-old man presented with approximately a 2-mo history of constipation and without cancer history. On sigmoidoscopy, there was a luminal narrowing and thickening of rectum with mucosa being grossly normal in its appearance. On contrast-enhanced CT,marked contrast enhancement with wall thickening of rectum was noted. On pelvic MRI, rectal wall thickening showed a target sign on both T2-weighted imaging and DWI. A diffuse infiltrative lesion was suspected in the prostate gland based on low signal intensity on T2-weighted imaging and restricted diffusion. A transanal full-thickness excisional biopsy revealed metastasis from a prostate adenocarcinoma invading the submucosa to the muscularis propria consistent with metastatic RLP. We would like to emphasize the CT and MRI findings of metastatic RLP due to prostate cancer.
基金supported by the Scientific Research Foundation of Ministry of Health of Chinathe Major Project of Medical and Health Science Foundation of Zhejiang Province of China(No.WKJ-2009-2-021)
文摘The objective of this study was to investigate the endosonographic appearance of gastric linitis plastica(GLP) and to study the usefulness of endoscopic ultrasonography(EUS) for the T and N staging of GLP.EUS examinations of 55 patients with histologically proven GLP were retrospectively studied.In all patients,EUS showed that lesions involved at least one-third of the circumference of the stomach.Based on the findings of the EUS,the 55 patients were divided into two groups.There were 32(58.2%) patients in the first group.EUS of this group showed that the five sonographic layers had disappeared and had been replaced by a hypoechogenic thickening of the gastric wall.There were 23(41.8%) patients in the second group.EUS of this group showed that the first three sonographic layers were blurred and thickened,and the fourth layer was significantly thickened.The full thickness of the gastric wall was significantly thicker in first than in the second group of patients(P<0.01).The incidence of perigastric lesions was significantly higher in the first than in the second group of patients(P<0.01).Results for the 15 patients following preoperative EUS were compared postoperatively with histopathologic findings for T and N staging.The overall diagnostic accuracy of the T stage was 73.3% and of the N stage was 60.0%.In eight patients,we used EUS to assess a therapeutic response.No response was observed in five patients and a partial response in three.EUS images of GLP are characteristic.EUS is helpful in diagnosing GLP and for assessing the T and N stages.
文摘BACKGROUND Gastric linitis plastica(GLP)is a subset of gastric cancer with a poor prognosis.It is difficult to obtain a definitive diagnosis by endoscopic mucosal biopsies,and the usefulness of an endoscopic ultrasonography-guided fine-needle biopsy(EUSFNB)for GLP has been recently reported.Meanwhile,autoimmune diseases are occasionally known to coexist with malignant tumors as paraneoplastic syndrome.We herein report the usefulness of an EUS-FNB for detecting GLP and the possibility of paraneoplastic syndrome coexisting with GLP.CASE SUMMARY An 81-year-old man was admitted to our hospital for a 1-mo history of epigastric pain that increased after eating.His laboratory data revealed high levels of serum carbohydrate antigen 19-9 and immunoglobulin-G4.Endoscopic examinations showed giant gastric folds and reddish mucosa;however,no epithelial changes were observed.The gastric lumen was not distensible by air inflation,suggesting GLP.Computed tomography showed the thickened gastric wall,the diffuse enlargement of the pancreas,and the peripancreatic rim,which suggested autoimmune pancreatitis(AIP)coexisting with GLP.Because the pathological findings of the endoscopic biopsy showed no malignancy,he underwent an EUSFNB and was diagnosed with GLP.He received chemotherapy for unresectable gastric cancer due to peritoneal metastasis,after which both the gastric wall thickening and diffuse enlargement of the pancreas were improved.CONCLUSION An EUS-FNB for GLP with a negative endoscopic biopsy is useful,and AIP may develop as a paraneoplastic syndrome.
文摘Aim: We report a rare case of gastric linitis plastica revealed by vertebral metastases without another digestive dissemination. Case presentation: The Benin native woman was hospitalized in rheumatology for inflammatory back pain without another signs. Rx ray showed vertebra metastasis. In the etiologic research, gastroscopy showed an infiltrating lesion of the antral area, indicating gastric linitis which was confirmed by biopsy. Short and medium-term evolution was favourable, characterized by a complete disappearance of the pains and a good physical condition. Conclusion: Vertebral metastases can reveal digestive cancer, although human gut is not among the most bone metastatic cancers.
文摘BACKGROUND Secondary rectal linitis plastica(RLP)from prostatic adenocarcinoma is a rare and poorly understood form of metastatic spread,characterized by a desmoplastic response and concentric rectal wall infiltration with mucosal preservation.This complicates endoscopic diagnosis and can mimic gastrointestinal malignancies.This case series underscores the critical role of magnetic resonance imaging(MRI)in identifying the distinct imaging features of RLP and highlights the importance of considering this condition in the differential diagnosis of patients with a history of prostate cancer.CASE SUMMARY Three patients with secondary RLP due to prostatic adenocarcinoma presented with varied clinical features.The first patient,a 76-year-old man with advanced prostate cancer,had rectal pain and incontinence.MRI showed diffuse prostatic invasion and significant rectal wall thickening with a characteristic"target sign"pattern.The second,a 57-year-old asymptomatic man with elevated prostatespecific antigen levels and a history of prostate cancer exhibited rectoprostatic angle involvement and rectal wall thickening on MRI,with positron emission tomography/computed tomography PSMA confirming the prostatic origin of the metastatic spread.The third patient,an 80-year-old post-radical prostatectomy,presented with refractory constipation.MRI revealed a neoplastic mass infiltrating the rectal wall.In all cases,MRI consistently showed stratified thickening,concentric signal changes,restricted diffusion,and contrast enhancement,which were essential for diagnosing secondary RLP.Biopsies confirmed the prostatic origin of the neoplastic involvement in the rectum.CONCLUSION Recognizing MRI findings of secondary RLP is essential for accurate diagnosis and management in prostate cancer patients.
文摘AIM To report on a more accurate diagnostic possibility offered by endoscopic ultrasound-guided cutting of holes and deep biopsy (EUS-CHDB) for pathologic diagnosis of gastric infiltrative tumors and gastrointestinal submucosal tumors. METHODS Ten consecutive patients who were suspected of having gastric invasive tumors or gastrointestinal submucosal tumors underwent EUS-CHDB with a novel vertical diathermic loop. We reviewed their medical data and analysed the effectiveness and safety of this new method. The final diagnosis was based on the surgical pathology or clinical/imaging follow-up. RESULTS EUS-CHDB was performed successfully in all the ten patients. Neither severe haemorrhage nor perforation occurred in any patient. Among the ten patients, there were three cases of gastric linitis plastica, one case of gastric lymphoma, five cases of gastrointestinal stromal tumors (GISTs), and only one case of chronic non-atrophic gastritis. That is, nine (90%) of the cases CONCLUSION EUS-CHDB may be a technically feasible and safe option for patients with gastric infiltrative tumors or gastrointestinal submucosal tumors. EUS-CHDB may be used as a remedial or even preferred biopsy method for submucosal lesions.
文摘Aim： To discuss important points on medical history, preoperative evaluation, real expectations, and selection of the appropriate surgical procedure to improve patient satisfaction after surgical procedures for Peyronie＇s disease. Methods： Recent advances in approaches to Peyronie＇s disease are discussed based on the literature and personal experiences. Issues concerning surgical indication, patient selection, surgical techniques, and grafting are discussed. Lengthening procedures on the convex side of the penile curvature by means of grafting offer the best possible gain from a reconstruction standpoint. Penile rectification and rigidity are required to achieve a completely functional penis. Most patients experience associated erectile dysfunction （ED）, and penile straightening alone may not be enough to restore complete function. Twenty-five patients were submitted to total penile reconstruction on length and girth with concomitant penile prosthesis implant. The maximum length restoration was possible and limited by the length of the dissected neurovascular bundle. The mean age was 55.4 years （32-69 years） and the mean angle of curvature 74.2± 22.4° （0-100°）. Pericardial grafting was used to cover the defect. The mean follow-up time was 11.2 ± 5.9 months （3-22 months）. Results： Mean functional penile length gain was 3.40 ＋ 0.73 cm （2-5 cm）. Penile prosthesis maintained the penis straight. No infections occurred. Sexual intercourse was restored in all patients and all reported recovered self-esteem. Conclusion： Improving patient satisfaction with the surgical treatment includes proper preoperative evaluation on stable disease, penile shortening, vascular and erectile status, patient decision and selection as well as extensive discussion on surgical technique for restoring functional penis （length and rigidity）. Length and girth restoration is very important for self-esteem and patient satisfaction.
文摘Based on the Plastica theory (see ref. [12]), the large deflection of an elastic-perfectly plastic cantilever subjected to an inclined concentrated force at its tip, before the unloading in the plastic region occurs, is analyzed in this paper. The emphasis of the analysis is put on the effects of the angle of inclination of the concentrated force upon the deformed shape, the load-deflection relationship and the length of the plastic region. Both analytical and computed results are given.
文摘目的:构建皮革胃患者术后预后的列线图预测模型,并验证其准确性。方法:收集2008年12月—2014年9月共203例在福建医科大学附属协和医院胃外科行R_0切除的皮革胃患者的临床病理资料。根据Cox逻辑回归分析确定的独立预后因素,用R软件建立列线图预测模型,并分析所建模型对皮革胃患者预后预测的准确度。结果:全组患者中,男152例,女51例,其平均年龄为60.3(21～89)岁;II期患者25例(12.3%),III期患者178例(87.7%);中位随访时间38(2～111)个月;3、5年总体生存率分别为31.2%、18.7%。多因素分析结果示,BMI(P=0.006)、肿瘤细胞分化程度(P=0.042)、T分期(P=0.032)、N分期(P=0.032)、ASA评分(P=0.016)是预后的独立危险因素。根据以上独立危险因素建立列线图,并根据列线图的得分将患者进行危险分组分析发现,高危组(>16分)、中危组(>8～16分)和低危组(≤8分)患者的生存差异有统计学意义(P<0.001)。列线图的线性χ~2、阳性似然比、赤池信息量值准则均优于第七版AJCC-TNM分期系统(68.99 vs. 58.58、70.18 vs. 58.36、1 473.38 vs. 1 485.04)。结论:所建立的列线图模型能有效预测皮革胃患者的术后总体生存率,其预测准确度优于第7版AJCC-TNM分期系统,但该结果仍需进一步通过大宗的病例和多中心研究验证。
