人胚胎胃肠及胰腺D细胞发生的研究

用免疫细胞化学方法研究人胚胎各时期胃肠胰的Ｄ细胞发生及其形态与功能的关系。结果发现：Ｄ细胞最早出现于６周零５天胚的十二指肠，７周零３天胚的胰、胃、空肠，７周零６天胚的回肠，８周零４天胎的结肠及１０周零５天胎的阑尾；细胞密度在胚期低，胎期逐增，至胎晚期又依次在胰、胃窦、十二指肠、胃体、空肠、回肠、升结肠及阑尾中降低，且肠绒毛顶端可见衰老的Ｄ细胞。提示胚胎Ｄ细胞的发生与胃肠胰的发育有关。     

The pancreas in acute graft versus host disease in man

Twenty-six bone marrow transplant recipients, 14 of whom had evidence of acute graft versus host disease at autopsy, were studied. The pancreas in four of these patients exhibited changes thought to be due to acute graft versus host disease. Pathognomonic findings were in exocrine ducts which showed marked epithelial cellular atypia associated with a mild lymphocytic infiltrate. This was accompanied by ulceration and intraluminal haemorrhage in severe cases. In three of these four cases ductal epithelium showed marked hyperexpression of class I and class II major histocompatibility complex molecules. By contrast islets were not inflamed, showed no evidence of endocrine cell damage and no abnormalities of major histocompatibility complex expression were seen.     

Effects of long-term parenteral nutrition on the course of pancreatic pseudocyst

The benefit of total parenteral nutrition (TPN) for the non-operative treatment of acute pancreatic pseudocyst remains hypothetical benefit. We reviewed results for 40 patients with pancreatic pseudocyst treated with TPN who had had serial imaging studies. On presentation, mean cyst size was 7.4 cm and after non-operative treatment with TPN (mean 32.5 days) the cyst had decreased to 5.6 cm. After the non-operative period, 68% of the pseudocysts had regressed, completely in 14% and partially in 54% of the patients. Except for 1 patient with cyst-related obstructive jaundice, there were no complicated pseudocysts. Only 12 (28%) of the patients underwent cyst drainage. Fifteen patients (35%) sustained catheter-related complications, which included sepsis (26%), pneumothorax (9%), hydropneumothorax (2%), and septic right atrial thrombosis (2%), during the course of hospitalization. Most of the patients treated with TPN showed both clinical and radiographic regression of their pseudocysts. However, the risk of catheter-related complications in this group suggests that this therapy should be limited to those patients who are unable to sustain enteral nutrition.     

高能聚焦超声刀联合氟脲嘧啶、四氢叶酸治疗晚期胰腺癌临床疗效观察

目的探讨高能聚焦超声刀加氟脲嘧啶、四氢叶酸治疗晚期胰腺癌临床疗效及毒副作用。方法30例经病理学或细胞学确诊的晚期胰腺癌病人先用高能聚焦超声刀(HIFU)治疗，再予氟脲嘧啶、四氢叶酸联合化疗。氟脲嘧啶500mg／m^2加入5％GNS500ml静滴持续6小时以每天1次连用5天，CF(四氢叶酸)100mg／m^2加入生理盐水250ml静滴每天1次连用5天，28天为1周期，至少治疗2个周期。结果CR1例；PR9例；MR9例；NC5例；PD6例。总有效率63％。毒副作用主要消化道反应，其他副作用轻微。结论应用HIFU局部治疗胰腺癌同时合用四氢叶酸加氟脲嘧啶全身化疗近期疗效提高明显，止痛明显达75％，副反应小，值得应用。     

EUS AND PANCREATIC CYST DRAINAGE: AN UPDATE

Endoscopic drainage has become the primary therapy for pancreatic pseudocysts. Diagnostic endoscopic ultrasound (EUS) has added safety to the procedure and interventional EUS has broadened the indications to non‐bulging lesions. At the same time, more aggressive endoscopic treatment has also made it possible to treat infected pseudocysts and organized pancreatic necrosis. The indications and technique are reviewed in this paper.     

手助腹腔镜胆肠、胃肠内引流术联合125I粒子置入术治疗晚期胰腺癌

目的探讨手助腹腔镜胆肠、胃肠内引流术联合125I粒子置入术治疗晚期胰腺癌的可行性和临床疗效. 方法2002年2月～2004年8月,我院行手助腹腔镜胆肠、胃肠内引流术联合125I粒子置入术治疗晚期胰腺癌12例(胰头癌10例,胰体癌2例). 结果 12例手术均获成功.手术时间104～181 min,(122±29) min.术中出血量45～152 ml,(60±18) ml.住院时间6～17 d,(8.5±1.3) d.术后病人黄疸逐渐减退,术后7～10 d肝功能恢复正常.腹痛消失3例,明显缓解7例.2例出现胃肠功能障碍,治疗后缓解.10例术后随访6个月复查CT肿瘤明显缩小(PR)4例,无变化(NC)4例,肿瘤进展(PD) 2例. 结论手助腹腔镜内引流术联合癌组织间125I粒子置入术是治疗晚期胰腺癌,使其缓解症状的有效方法,具有创伤小、恢复快、能改善病人生活质量.     

胰十二指肠损伤的临床特点及术后并发症危险因素分析

目的探讨胰十二指肠损伤的临床特点及术后并发症发生的危险因素。方法回顾性分析47例外伤性胰十二指肠损伤手术病例的临床特点,探讨年龄、术前/术中休克、胰十二指肠联合损伤、确诊时间及ISS、APACHEⅡ评分等因素与术后并发症发生率、死亡率的关系。结果47例病例中,腹部闭合性损伤占76.60%,开放性损伤23.40%,多发伤40.43%。胰腺损伤13例,十二指肠损伤28例,胰十二指肠联合损伤6例。术前确诊率为53.19%,手术诊断率97.87%,确诊时间(7.85±3.17)h。术后并发症发生率和死亡率分别为27.66%和8.51%。并发症组的术前/术中休克发生率、胰十二指肠联合损伤发生率、确诊时间、ISS、APACHEⅡ评分分别为53.85%、38.46%、(9.78±2.16)h、20.92±8.11、10.32±3.16,无并发症组分别为11.76%、2.94%、(6.81±2.35)h、16.47±5.28、7.12±2.74,组间差异均有统计学意义(P<0.01或<0.05)。死亡组ISS、APACHEⅡ评分值分别为29.17±10.31、14.75±5.37,显著高于无死亡组的16.85±6.73、8.39±3.13(P<0.01)。结论胰十二指肠损伤在病史、实验室及影像学检查方面具有其特点,综合分析有利于迅速明确诊断,休克、胰十二指肠联合损伤、确诊时间及高ISS、APACHEⅡ评分是其术后并发症发生的危险因素。     

Tetrahydrobiopterin Attenuates Microvascular Reperfusion Injury Following Murine Pancreas Transplantation

In this study we investigated the effect of tetrahydrobiopterin (BH4), an essential cofactor for nitric oxide synthases, on ischemia-reperfusion injury (IRI) following murine pancreas transplantation. Pancreatic grafts were exposed to prolonged cold ischemia times (CIT) and different treatment regimens: normal saline (S), S + 16 h CIT, BH4 50 mg/kg + 16 h CIT. Nontransplanted animals served as controls. Graft microcirculation was analyzed by means of functional capillary density (FCD) and capillary diameters (CD) after 2 h reperfusion using intravital microscopy. Quantification of inflammatory responses (mononuclear infiltration) and endothelial disintegration (edema formation) was done by histology (hematoxylin and eosin), and peroxynitrite formation assessed by nitrotyrosine immunostaining. FCD was significantly reduced after prolonged CIT, paralleled by increased peroxynitrite formation as compared with controls (all p < 0.05). Microcirculatory changes correlated significantly with intragraft peroxynitrite generation (Spearman: r = -0.56; p < 0.01). Pancreatic grafts treated with BH4 displayed markedly higher FCD values (p < 0.01) and abrogated nitrotyrosine staining (p = 0.03). CD were not significantly different in any group. Histology showed increased inflammation, interstitial edema, hemorrhage, acinar vacuolization and focal areas of necrosis after 16 h CIT, which was diminished by BH4 administration (p < 0.01). BH4 treatment significantly reduces post-ischemic deterioration of microcirculation as well as histologic damage and might be a promising novel strategy in attenuating IRI following pancreas transplantation.     

胰头癌的早期诊断分析

目的 探讨胰头癌的早期诊断措施和各种影像学检查方法的合理应用。方法 对我院1998年1月～2002年12月间，42例胰头癌患者的临床资料和诊治过程进行回顾性统计分析。结果 所有病例均经剖腹手术和病理检查证实为胰头癌，92．8％的患者出现上腹饱胀不适的时间早于黄疸1～2月，胰头癌的ERCP、MRCP、CT等检查的影像学特征明显。对其中16例患者行胰十二指肠切除术，手术切除率为38．1％。结论 重视胰头癌早期非特异性症状，及时行B超检查。若B超发现阳性征象，应进一步综合、有序地运用各种影像学检查方法，力争达到早期诊断的目的。     

PRIMARY LYMPHOMA OF THE PANCREAS

Lymphoma of the pancreas is uncommon. Secondary invasion from contiguous, retroperitoneal lymph node disease is the predominant mode of involvement. Lymphoma originating in and remaining localized to the pancreas is very rare. A case of primary lymphoma confined to the pancreas, in a 35 year old man, is described. Only two other similar cases could be found in the English literature.