目的 探讨腹膜后囊性淋巴管瘤的CT诊断价值和治疗方法。方法 回顾性分析2004年6月至2010年5月期间我院收治的5例经病理检查证实的腹膜后囊性淋巴管瘤患者的临床表现、CT影像特征、手术治疗及术后随访的资料。结果 5例患者术前CT均诊断为囊性淋巴管瘤，均行手术完整切除肿瘤，术后病理结果均证实为囊性淋巴管瘤。术后7 d顺利出院，随访3个月～6年均无复发。结论 CT对腹膜后囊性淋巴管瘤的诊断具有重要意义，手术完整切除整个囊壁是治疗及预防术后复发的最好方法。
Objective To establish a safe, effective, and economic feeder-free culture system which is suitable for the culture of human parthenogenetic embryonic stem cells (hPESCs) in vitro. Methods hPESCs were cultured with mTeSRTMl medium (control group) and human foreskin fibroblasts-conditional medium (hFFs-CM) (experimental group). The growth status of hPESCs in both feeder-free culture systems were observed with inverted microscope. Alkaline phosphatase (ALP) analysis and karyotype analysis were used to study the biological characteristics of hPESCs. The expression of hPESCs pluripotent marker Oct-4 was analyzed by RT-PCR. Differentiation experiment in vivo and in vitro was applied to observe the differentiation potential of hPESCs into three germ layers. Results hPESCs had regular morphology with difficulty in differentiation in both culture systems. No obvious difference was observed in morphology and expansion speed of hPESCs between 2 groups. After subcultured for 15 passages in vitro, hPESCs in 2 groups could maintain normal female diploid karyotype 46, XX and pluripotency. The expression of Oct-4 mRNA was positive in 2 groups. hPESCs in 2 groups could form embryonic body in differentiation experiment in vitro and could develop into teratomas containing three germ layers in nude mice. Conclusion Feeder-free culture system of hFFs-CM can sustain the growth of hPESCs and keep hPESCs undifferentiated state for long. A feeder-free culture system of hPESCs is successfully established, which can support the growth of hPESCs, reduce the contamination from animals, decrease the cost of culture, and satisfy the clinical large-scale application.