MRI of acquired posterior urethral diverticulum following surgery for anorectal malformations

Background  

Posterior urethral diverticulum (PUD) is one of the most common postoperative complications associated with anorectal malformation (ARM) correction.     

Surgical treatment for pancreatic cancer

胰腺癌是一种预后很差的恶性肿瘤,85%的病人在确诊后12个月内死亡,5年生存率仅为1%～2%.胰腺癌预后差的原因主要包括(1)很难在疾病早期做出诊断;(2)当发现胰腺发生病变时,又很难对疾病进行正确分期;(3)外科手术治疗的并发症和死亡率仍然较高;(4)缺乏有效的肿瘤辅助治疗手段.胰腺癌的分期非常重要,它可以尽早地区分肿瘤可切除的病人与不可切除的病人,避免不必要的剖腹探查术.在过去的20年中,用于胰腺癌分期的影像学技术越来越多,取得了很大进步,它们包括超声探测,双相螺旋CT扫描,选择性脏器血管造影,内窥镜逆行胰胆管造影,超速核磁共振,以及腹腔镜检查.它们各有优缺点,需综合分析几项检查结果才能得出准确分期.随着诊断和外科手术技术的提高,尤其是在拥有胰腺专业外科医师的疾病治疗中心,胰十二指肠切除术的并发症和死亡率近20年有了明显下降,同时手术切除率和术后生存率也有稳步提高.Whipple手术虽然仍是壶腹周围癌的标准手术方式,但是越来越多的外科医师将保留幽门的胰十二指肠切除术用于胰头癌的治疗,并证明它是一种安全、根治性切除手术.保留幽门的胰十二指肠切除术术后生存率、局部复发和远处转移与Whipple手术一样,但是术后病人的生活质量、体重增加和社会活动能力都明显好于Whipple术后病人.全胰切除由于存在许多弊端,而且没有明显改善胰腺癌病人的预后,除非在特殊情况下,不宜使用.一些临床资料显示姑息性切除的病人预后优于不切除的病人,尤其是在术后第1年.扩大性淋巴结清扫是否可以提高5年生存率目前意见尚未统一,需要进一步临床前瞻性观察.虽然胰腺癌外科治疗取得了很大成绩,但是,目前一致认为单靠外科手术切除尚不能控制此疾病的进展.为了改善胰腺癌病人的预后,必须深入研究胰腺癌的生物学特性,及其对化疗、放射治疗和基因治疗等肿瘤辅助治疗的反应,并进行临床前瞻性观察.     

Iliac vein recanalisation and stenting accelerate healing of venous leg ulcers associated with severe venous outflow obstruction

Obstruction involving the iliac veins and/or inferior vena cava is highly comorbid in patients with chronic venous leg ulcers and is a barrier to healing. Intervention with venous stenting is recommended to promote wound healing; however, there is limited data to quantify the effects of venous outflow restoration on wound healing. We retrospectively identified patients with venous ulcers and comorbid venous outflow obstruction. Data regarding demographics, wound size, degree of obstruction, interventions, wound healing and recurrence were collected. Intervention was performed when possible and patients were grouped based on whether or not the venous outflow was reopened successfully and maintained for at least 1 year. Outcomes, including time to wound healing, wound recurrence, stent patency and ulcer-free time, were measured. Patients who maintained a patent venous outflow tract experienced higher rates of wound healing (79.3%) compared to those with persistent outflow obstruction (22.6%) at 12 months (p < 0.001). Ulcer-free time for the first year was also greater with patent venous outflow (7.6 ± 4.4 months versus 1.8 ± 3.0 months, p < 0.0025). Patients with severe obstruction of the venous outflow tract experience poor healing of VLUs despite appropriate wound care. Healing time is improved and ulcer-free time increased after venous intervention with stenting to eliminate obstruction.