Résection endoscopique des tumeurs sous-muqueuses gastriques de petite taille

Subepithelial tumors (SETs) in the stomach are usually found incidentally during endoscopic examinations. Most gastric SETs are asymptomic and are formerly considered to have a benign nature, such as lipomas, shwannomas, leiymyomas. However, several gastric SETs have malignant potential, especially when they originate from the muscularis propria layer such as gastrointestinal stromal tumors or neuroendocrine tumors. SETs diagnostic is challenging, even after endoscopic ultrasound evaluation and biopsies. Thus, gastric SETs resection is justified because it provides histological analysis and curative treatment. For small gastric SETs (<2 cm), endoscopic resection is promising and associated with lower morbi-mortality comparatively to surgery. Resection techniques are close from endoscopic submucosal dissection, such as submucosal tunneling endoscopic resection or endoscopic full thickness resection. Some studies reported that complete resection rate was superior to 90% with low recurrence rates ranging from 0 to 2%. Severe adverse event occurrence (massive bleeding, perforation and pneumothorax) is rare. However, these promising results have to be confirmed in larger studies and with long term follow-up.     

Role of endoscopic ultrasonography in the diagnosis of early esophageal carcinoma

Endoscopic ultrasonography (EUS) for the diagnosis and staging of early esophageal carcinoma is discussed. Based on the nine-layered structure of esophageal wall, which is in good correspondence with histological layers, depth of carcinoma invasion can be investigated. Ultrasound endoscopes and probes are used for the examination. Ultrasound probes with 20 MHz and 30 MHz transducers can demonstrate the clear images of early esophageal carcinoma by using water filling method, which can discuss the change of the esophageal wall from the surface layer. Although the early esophageal carcinoma is detected by endoscopic findings with or without the dye spraying method by iodine, the diagnosis of depth of carcinoma invasion is not easy. EUS can assist in the diagnosis of depth of carcinoma invasion. Confirming the depth of carcinoma invasion by EUS and the lesion is limited to the mucosa. Endoscopists can decide the indication for endoscopic resection of the lesions.     

内镜超声弹性成像的原理与临床应用

内镜超声（endoscopic ultrasound, EUS）已成为消化系统疾病的重要诊断手段之一。内镜超声弹性成像（EUS Elastography, EUS E）能够实现胃肠道及其毗邻器官的可视化弹性评估,提高了EUS对消化道疾病诊断能力。此外,EUS E还可为内镜超声引导下细针穿刺（EUS fine needle aspiration, EUS FNA）技术提供辅助信息,从而提高疾病诊断和组织学获取的准确性。本文主要就EUS E的原理、方法和临床应用作一综述。     

超声内镜在上消化道黏膜隆起型病变诊断和治疗中的应用

目的探讨超声内镜在上消化道黏膜隆起型病变的诊断和内镜治疗中的价值。方法运用超声内镜检查114例上消化道黏膜隆起型病变,并对其中26例进行超声内镜引导下病变切除术。结果黏膜隆起病变性质以间质瘤最常见,占51.8%,其次,壁外压迫占21.9%,较少见有恶性肿瘤、脂肪瘤、异位胰腺、囊肿等。对26例黏膜下肿瘤进行切除,超声诊断和病理符合率达77.0%。手术并发症少见。结论超声内镜可初步定性上消化道黏膜隆起型病变,对黏膜下肿瘤的治疗选择有指导作用;超声内镜引导下内镜切除黏膜下间质瘤安全、有效。     

超声内镜检查在低增殖活性胃肠道神经内分泌肿瘤微创治疗中的价值

目的 评价超声内镜(endoscopic ultrasonography, EUS)在低增殖活性胃肠道神经内分泌肿瘤(gastrointestinal neuroendocrine neoplasm, GI NEN)微创治疗中的价值。方法 回顾分析130例低增殖活性GI NEN的内镜病理资料,所有病例均经病理及免疫组织化学明确诊断,所有病例均行胃镜检查发现瘤体,并行镜下微创治疗,其中行超声胃镜检查59例,直接镜下切除71例。所有病例进行内镜随访。结果 130例均行病理G分期：Gl期114例,G2期16例。其中对切除病理依术前EUS评估与否进行分组,非EUS评估组垂直切缘阳性率高于EUS评估组（P=0.03）, 而水平切缘阳性率两组间差异无统计学意义。随访结果中23例再次治疗病例均为多发病例。结论 低增殖活性GI NEN在EUS指导下选择合适的内镜切除方法,可以提高内镜完全切除率。多发低增殖活性GI NEN内镜治疗复发率高,应严密随访。     

Endoscopic resection of submucosal esophageal tumors: a prospective case series

BACKGROUND AND STUDY AIM: The introduction of endoscopic ultrasound (EUS) and endoscopic mucosal resection has offered a new alternative to simple observation or surgical resection for the management of esophageal submucosal tumors. PATIENTS AND METHODS: During a 4-year period, endoscopic resection was attempted in 20 consecutive patients (nine women, 11 men; mean age 52 +/- 10 years) with esophageal submucosal tumors < 4 cm in size, confirmed by endoscopy and miniprobe EUS (20 MHz). The mean tumor diameter was 17 +/- 8 mm (8 - 34 mm). Prior EUS-guided cytological examination revealed benign tumors in 11 patients; however, endoscopic resection was attempted in most patients for diagnostic purposes also. Several patients were symptomatic (retrosternal pain, n = 4; dysphagia, n = 4; recurrent bleeding, n = 2) but most tumors had been detected incidentally. RESULTS: In the majority of patients the tumor was ligated with a rubber band and then resected with a snare (n = 11), and in the others simple snare resection ("lift-and-cut," n = 7) or cap resection (n = 2) was done. A macroscopically complete endoscopic resection was achieved in 19/20 patients, and the remaining patient was managed surgically. Endoscopic hemostasis was necessary (and successful) in eight patients (40 %), but blood transfusion was not required. No other side effects occurred. Histological examination revealed granular cell tumor in 12 patients, leiomyoma in six patients, and a lipoma and stromal tumor in one patient each. Histologically, all tumors were judged to be benign and a microscopically complete resection (R0) was achieved in all patients, with the exception of the one patient with a stromal tumor. Thus, surgical resection was necessary in only two of the 20 patients (10 %). During the median prospective follow-up of 12 months no tumor recurrence was detected in any patient. CONCLUSION: Endoscopic resection of esophageal submucosal tumors is safe and effective. The probability of achieving curative resection (R0 resection, histologically benign) is high especially if the tumors are smaller in size (< 4 cm).     

高频小探头超声辅助内镜下治疗上消化道黏膜下肿瘤

目的探讨高频小探头超声辅助内镜下高频电凝电切圈套切除术治疗上消化道黏膜下肿瘤的安全性和疗效。方法治疗前经高频小探头超声评估和未经评估的分别为84例和110例，采用高频电凝电切圈套切除术治疗直径0．5～3．0cm上消化道黏膜下肿瘤，严密观察有无出血、穿孔等并发症，切除组织全部送组织病理学检查，术后定期门诊随访。结果经高频小探头超声评估后内镜下高频电凝电切圈套切除术治疗成功率100％（84／84），无1例出现大出血、穿孔等严重并发症；而未经超声内镜评估的治疗成功率85．69％（101／110），3例出现大出血，4例穿孔，两组病例随访2～60个月均未见肿瘤复发。结论高频小探头超声辅助内镜下高频电凝电切圈套切除术治疗上消化道黏膜下肿瘤是一项安全、有效的方法。     

Barrett's esophagus

Esophageal cancer staging is a widely accepted indication for endoscopic ultrasonography (EUS). The evaluation of Barrett's esophagus (BE) with EUS is indicated only when there is high-grade dysplasia or a concern for malignancy in an endoscopic lesion. Because the options for the management of BE and early adenocarcinoma are diverse, proper selection of patients by accurate staging with EUS is critical, particularly when nonoperative management is considered. For example, patients with BE with high-grade dysplasia may be offered esophagectomy in some medical centers, but nonoperative therapies such as endoscopic ablative therapy or mucosal resection may be the preferred treatment options in other gastroenterology practices. This article discusses the scientific evidence for the use of EUS in BE or early esophageal adenocarcinoma.     

内镜超声在食管黏膜下肿物临床诊疗中的应用价值

目的探讨内镜超声在食管黏膜下肿物(SMT)临床诊疗中的应用价值。方法回顾性分析该院113例胃镜下发现的食管SMT并行超声内镜(EUS)检查的患者,收集患者115处SMT病变的临床特点、内镜检查治疗和病理组织学结果等资料,并对术后患者进行随访。结果 SMT好发于食管上段44处(38.26%)和中段(38/115,33.04%);病理结果显示,84.35%为平滑肌瘤(97/115),另外5处食管囊肿(4.35%),5处黏膜下固有腺体增生伴导管扩张(4.35%),2处间质瘤(1.74%),2处脂肪瘤(1.74%),1处神经鞘瘤(0.87%),1处血管瘤(0.87%),1处浆液性腺瘤(0.87%),1处颗粒细胞瘤(0.87%);EUS诊断符合率分别为平滑肌瘤93.00%(93/100),食管囊肿55.50%(5/9),间质瘤0.00%(0/3),脂肪瘤100.00%(2/2),血管瘤100.00%(1/1)。EUS诊断起源于黏膜肌层者,主要选择内镜下黏膜切除术(EMR)(76.12%,51/67)和内镜黏膜下剥离术(ESD)(23.88%,16/67)治疗,起源于黏膜下层者,主要选择EMR(35.71%,5/14)和ESD(64.29%,9/14)治疗,起源于固有肌层或累及固有肌层者,多选择经内镜黏膜下隧道肿瘤切除术(STER)(84.85%,28/33)治疗。免疫组化结果示平滑肌瘤98.97%(96/97)平滑肌肌动蛋白(SMA)和97.94%(95/97)结蛋白(Desmin)表达阳性。结论 EUS对SMT的病理性质可进行较准确的诊断,并指导食管SMT内镜下微创手术方式的选择,能进行安全有效的治疗,但对食管间质瘤、神经鞘瘤等少见食管肿瘤的诊断具有一定的局限性。     

Impact of endoscopic ultrasonography in the diagnosis of aberrant right subclavian artery: a case report

Aberrant right subclavian artery (ARSA) is the most common anomaly of the aortic arch. We present the successful use of endoscopic ultrasonography (EUS) in the diagnosis of ARSA. A 65-year-old woman was admitted because of dyspnoea and inspiratory stridor. Bronchoscopy revealed a subglottic tracheal stenosis. To exclude an underlying malignancy, endoscopy was performed showing an oesophageal impression, which subsequently was identified as ARSA by EUS. Computed tomography excluded neoplasm and confirmed the diagnosis of ARSA. After laser resection of subglottic tissue the stridor resolved and could therefore not be attributed to the co-existence of ARSA. In most cases the ARSA crosses between the oesophagus and the spine from the descending aortic arch to the right and may seldom cause dysphagia due to oesophageal compression. Diagnosis is usually based upon computed tomography or magnetic resonance imaging, whereas angiography is only rarely needed. Endoscopic ultrasonography offers a convenient alternative diagnostic tool and can be performed even as a bedside examination. The diagnosis can be easily assessed in all patients referred for EUS of the upper gastrointestinal tract for any reason. Especially in patients undergoing invasive procedures in the upper thorax or neck, knowledge of an abnormal course of the great vessels is important. Arteria lusoria is often found by chance. EUS is a simple and excellent tool for assessing the diagnosis and usually does not require confirmation through other investigation methods.     

Endoscopic resection of benign tumors of the papilla of vater

Most benign papillary tumors are adenomas which can potentially undergo the adenoma-carcinoma-sequence making complete removal mandatory for curative therapy. Endoscopic resection (papillectomy) of these lesions is being increasingly performed as a less traumatic alternative to surgery. Available data shows endoscopic papillectomy to be effective and safe in experienced hands with usually little morbidity and virtually no mortality. Success rates are around 80 % for lesions without intraductal involvement. Selected cases of limited distal intraductal involvement accessible after sphincterotomy may also be managed curatively by endoscopic resection. Endoscopic snare resection of entire lesions should be primarily regarded as a diagnostic procedure. It allows for an accurate histological diagnosis based on examination of the entire specimen rather than forceps biopsies and thus a reliable assessment of the need for surgical therapy. Subsequent surgery in operable patients is not precluded by previous endoscopic resection. Surgery is indicated in case of incomplete removal and if malignancy is present. The curative role of endoscopic papillectomy for early invasive carcinoma needs to be established. Histological features and individual risk for surgery are factors to be considered. Inoperable patients may still benefit from palliative endoscopic stenting. After endoscopic papillectomy has been completed, regular follow-up examinations including biopsies are warranted because of the risk of local recurrence. For benign looking papillary tumors, endoscopic papillectomy serves as a diagnostic tool and should be considered as first line procedure regardless of age. The following article details the approach to patients with benign papillary tumor and the technique of endoscopic papillectomy.     

Endoscopic Ultrasound-Guided Drainage of Pancreatic Fluid Collections (with Video)

Endoscopic ultrasound (EUS) is often used to guide drainage of pancreatic fluid collections (PFCs). EUS enhances the diagnosis of cystic pancreatic lesions and enables real-time image-guided control of PFC drainage. EUS may facilitate the endoscopic treatment of patients with pancreatic necrosis and patients with disconnected pancreatic duct syndrome.     

Advances in the endoscopic management of patients with pancreatic and biliary malignancies

Major advances in endoscopic techniques to diagnose and manage pancreatic biliary diseases have fundamentally changed the approach to these difficult clinical challenges. The diagnosis of benign and malignant pancreatic-biliary diseases is much more readily obtained through a combination of cross-sectional imaging and endoscopic procedures. Endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic ultrasound (EUS) are the most important endoscopic tools for imaging and accessing the pancreatic biliary system. The review summarizes the major imaging methods for providing a diagnosis of bile duct malignancy, including ERCP, transhepatic cholangiography (THC), and magnetic resonance cholangiopancreatography (MRCP). High quality image examples of cholangiocarcinoma are provided. EUS has provided a new imaging modality for the detection of pancreatic and biliary malignancy. EUS is particularly sensitive for the detection of early pancreatic malignancy. Furthermore, EUS excels at the guidance of fine needle aspiration of pancreatic lesions. Diagnostic tissue acquisition for cholangiocarcinoma remains an important challenge. The endoscopic therapy for pancreatic-biliary malignancy involves the use of stenting which relieves the biliary obstruction commonly seen in these patients.     

Endoscopic ultrasound-guided fine needle aspiration in hollow viscus cancer

Accurate cancer staging is essential in patients with hollow viscus malignancy to decide therapeutic modalities. Endoscopic ultrasound (EUS) is considered as the best modality for local staging of hollow viscus cancer. EUS-guided fine needle aspiration (FNA) is a minimally invasive and effective sampling method. EUS-FNA should be applied when positive diagnosis of malignancy can possibly change the choice of therapeutic options. EUS in conjunction with EUS-FNA can optimize stage-directed therapy which is helpful in selecting minimally invasive treatment option including endoscopic treatment and avoiding unnecessary surgery in advanced cases.     

Complications of endoscopy

This article focuses on potential complications of standard upper and lower endoscopic procedures. Adverse events associated with endoscopic retrograde cholangiopancreatography, EUS, and certain advanced therapeutic techniques such as mucosal resection are not covered. Rather, the article focuses on the recognition of preprocedure risk factors for various complications and the diagnosis and management for procedure-related adverse events.     

EUS-guided FNA of solid pancreas tumors

Although endoscopic ultrasonography (EUS) is considered superior to MRI and CT in detecting pancreatic masses, it is the ability to target and place a needle into suspicious lesions that has made EUS indispensible in the evaluation of patients with solid pancreatic tumors. Endoscopic ultrasound-guided-fine-needle aspiration (EUS-FNA) is an accurate and safe technique to confirm the diagnosis of pancreatic cancer. EUS-FNA is now the principal technique applied to obtain the diagnosis of malignancy. We have designed this article to address a number of the key technical aspects of EUS-FNA of solid pancreatic masses.     

88例胃肠间质瘤临床诊断分析

目的探讨胃肠道间质瘤（GIST）的临床诊断方法。方法回顾性分析88例GIST患者的临床表现、影像学资料、胃肠镜、超声内镜（EUS）的结果,并进行分析、总结。结果 GIST缺乏特异性症状或体征;88例行腹部彩超发现16例病变,腹部彩超仅能发现腔外、转移病灶和少部分腔内病灶,价值不大;46例行腹部CT发现32例病变,腹部螺旋CT检查可发现较大病灶并且有助于判断胃肠间质瘤的危险性,对有无转移也有明确的诊断价值,但对于微小病灶的检出有一定困难;53例胃或结直肠病变的患者胃肠镜检查发现率为100%,但难以对病变进行定性;53例胃或结直肠病变的患者EUS误诊为其他疾病的有6例,对GIST的定性和定位有较好的辅助价值,但与病理结果之间仍有一定的出入。结论结合多种检查手段对明确GIST的诊断有重要价值,但确诊仍需病理检查。     

超声内镜实时组织弹性成像的应用

近年来随着超声及内镜技术的进一步发展和日趋完善,融合2项技术的超声内镜功能不断拓展.超声内镜实时组织弹性成像技术(EUS R.TEI)就是在超声内镜检查中对组织弹性的量化和可视化的一种最近发展起来的影像技术,在明确病变性质和鉴别病变良恶性方面为超声内镜提供了有效补充,袁现出优越的性能,是一项很有前途的技术.该文就超声内镜实时组织弹性成像的原理及在临床上的应用作一介绍.     

Rectosigmoid endometriosis: endoscopic ultrasound features and clinical implications

BACKGROUND AND STUDY AIMS: The main area of the gastrointestinal tract affected by deep pelvic endometriosis is the rectosigmoid colon in 3-37% of cases. Due to the risk of infiltration and the clinical symptoms of endometriosis, with pain and infertility, the condition may require surgical resection. Preoperative imaging diagnosis of rectosigmoid involvement is therefore important. Rectal endoscopic ultrasonography (EUS), which is already used for the staging of anorectal carcinoma and submucosal lesions, may be a promising technique for this indication. The present study was conducted in order to describe the endosonographic appearance of rectosigmoid endometriosis, and to define the potential relevance of the technique to the choice of resection method. PATIENTS AND METHODS: Between 1993 and 1997, 46 women (mean age 31) with deep pelvic endometriosis underwent imaging investigations and surgical resection. The clinical and imaging findings, and the surgical and histological features identified--mainly with regard to infiltration of the rectal wall--were compared retrospectively. The impact of the EUS findings on the decision on whether or not to carry out resection, either by laparoscopy or open abdominal surgery, was also examined. RESULTS: When there was deep pelvic endometriosis with suspected rectal wall infiltration, EUS showed normal anatomy in nine patients, endometriotic lesions without rectal wall infiltration in 12, and typical rectal infiltration in 25. The lesions were confirmed by the surgical findings during therapeutic laparoscopy (n = 22) and laparotomy (n = 25), as well as by clinical follow-up. Rectal wall infiltration, demonstrated in all cases using EUS, had initially been suspected on the basis of clinical examinations, rectoscopy, barium enema, computed tomography, and magnetic resonance imaging in 62%, 50%, 33%, 67% and 66% of cases, respectively. CONCLUSIONS: EUS is a simple and noninvasive technique capable of correctly diagnosing rectal wall infiltration in deep pelvic endometriosis. It may be helpful in determining the choice between laparoscopy and laparotomy when complete resection is indicated.     

Impact of miniprobes compared to conventional endosonography in the staging of low-grade gastric malt lymphoma

BACKGROUND AND STUDY AIMS: In patients with low-grade gastric MALT lymphoma, conventional endoscopic ultrasonography (EUS) is considered to be the most accurate modality for locoregional staging. The aim of this study was to evaluate the diagnostic role of ultrasonic miniprobes as part of routine clinical staging. PATIENTS AND METHODS: A total of 39 patients who were histologically diagnosed with low-grade MALT lymphoma were reviewed retrospectively before treatment (n = 15) and during follow-up (n = 24). Assessment of tumor penetration into the gastric wall was based on the TNM system. Pathological lymph-node involvement was suggested by the presence of inhomogeneous hypoechoic echo patterns, with clearly demarcated borders. All examinations were carried out using a mechanical miniprobe (Olympus; diameter 2.4 mm, 12 MHz) introduced through the working channel of the endoscope. Ultrasonic miniprobe findings were compared with conventional EUS data and histology. RESULTS: Using pretreatment endoscopic ultrasonography, gastric lymphomas presented endoscopically with an ulcer (in five of 15 patients) or a diffuse infiltrative pattern (ten of 15 patients). The ultrasonic miniprobe identified a T1 lesion in 53 % (T2, 33 %) and EUS in 60 % (T2, 20 %) of cases. Pathological lymph-node involvement in T1-T2 lesions was diagnosed with the ultrasonic miniprobe in 53 % of cases and with EUS in 60 %. Using endoscopic ultrasonography during the follow-up period, in patients with normal miniprobe ultrasonography (n = 15), the histological examination confirmed a complete remission in all patients. Hypoechoic thickening of the mucosa or submucosa, or both, was seen in nine patients. Endoscopic biopsies in four of these nine patients revealed recurrent lymphoma. CONCLUSIONS: The ultrasonic miniprobe can be recommended as part of routine care in patients with gastric MALT lymphoma, both initially and during the follow-up period. The clinical significance of ultrasonic miniprobe examinations is that they can be performed as a single-step procedure during diagnostic endoscopy.