巨淋巴结增生症的认识

目的提高对巨淋巴结增生症（GLNH）的认识。方法通过1例经手术及病理证实的GLNH的病例分析，结合复习文献，对本病的影像诊断与鉴别诊断进行讨论。结果GLNH是一种异源性的罕见的淋巴组织增生性良性疾病，其组织形态上可分为透明血管型和浆细胞型两类。前者多见，常表现为纵隔病变，也有报告表现为体表的淋巴结无疼性肿大；后者好发于肠系膜和腹膜后淋巴结，增强后有不同程度的强化。结论GLNH具有特征性的CT表现，CT具有较高的诊断价值，在动脉期明显强化，延迟期持续强化。但确诊还得靠病理证实。     

巨淋巴结增生症的认识

目的 提高对巨淋巴结增生症(GLNH)的认识.方法 通过1例经手术及病理证实的GLNH的病例分析.结合复习文献,对本病的影像诊断与鉴别诊断进行讨论.结果 GLNH是一种异源性的罕见的淋巴组织增生性良性疾病,其组织形态上可分为透明血管型和浆细胞型两类.前者多见,常表现为纵隔病变,也有报告表现为体表的淋巴结无疼性肿大;后者好发于肠系膜和腹膜后淋巴结,增强后有不同程度的强化.结论 CLNH具有特征性的CT表现,CT具有较高的诊断价值,在动脉期明显强化,延迟期持续强化.但确诊还得靠病理证实.     

Urotensin Ⅱ increases endothelin production by vascular smooth muscle cells in rats

The aim of this study was to observe the effects of urotensin Ⅱ (UII) on production of endothelin (ET) in rat aortic vascular smooth muscle cells (VSMC). Cultured VSMCs incubated with various concentrations of UII were used to measure the VSMC 3H-TdR incorporation, the amount of ET mRNA and ET production in VSMCs. In this work we found that UII (10-10-10-8 mol/L) promoted VSMC 3H-TdR incorporation (47%-83%, P < 0.01) and increased the amount of ET mRNA by 17.1% (P < 0.05) to 112.8% (P < 0.01), respectively, in a concentration dependent manner compared with control. After 4 and 8 h incubation, 10-10-10-8 mol/L of UII elevated the ET synthesis and release in a concentration dependent manner. After 4 h incubation, the content of ET in medium was 4.9, 5.36 and 7.12 pg/mL (P < 0.01). After 8 h incubation, the ET content released from VSMCs was 12.6, 12.07 and 17.17 pg/mL (P < 0.01). In addition, it was found that BQ123, a specific ETA receptor antagonist, obviously decreased the VSMC DNA synthesis induced by UII. The results of this study showed that UII could stimulate the ET mRNA expression and ET production in VSMC. The effects of UII on VSMC DNA synthesis were partly mediated by ET autocrine pathway. It suggests that the interaction between UII and ET plays an important biological regulating role as endogenous active peptides.     

Urotensin Ⅱ increases endothelin production by vascular smooth muscle cells in rats

The aim of this study was to observe the effects of urotensin Ⅱ (UII) on production of endothelin (ET) in rat aortic vascular smooth muscle cells (VSMC). Cultured VSMCs incubated with various concentrations of UII were used to measure the VSMC ³H-TdR incorporation, the amount of ET mRNA and ET production in VSMCs. In this work we found that UII (10^-10—10^-8 mol/L) promoted VSMC ³H-TdR incorporation (47%—83%, P < 0.01) and increased the amount of ET mRNA by 17.1% (P < 0.05) to 112.8% (P < 0.01), respectively, in a concentration dependent manner compared with control. After 4 and 8 h incubation, 10^-10—10^-8 mol/L of UII elevated the ET synthesis and release in a concentration dependent manner. After 4 h incubation, the content of ET in medium was 4.9, 5.36 and 7.12 pg/mL (P < 0.01). After 8 h incubation, the ET content released from VSMCs was 12.6, 12.07 and 17.17 pg/mL (P < 0.01). In addition, it was found that BQ₁₂₃, a specific ET_A receptor antagonist, obviously decreased the VSMC DNA synthesis induced by UII. The results of this study showed that UII could stimulate the ET mRNA expression and ET production in VSMC. The effects of UII on VSMC DNA synthesis were partly mediated by ET autocrine pathway. It suggests that the interaction between UII and ET plays an important biological regulating role as endogenous active peptides.     

N0期鼻咽癌颈部放射治疗不同方法的比较

目的分析和比较鼻咽癌上颈部预防照射和全颈部预防照射的颈部复发率和生存率的差异,以探讨N0期鼻咽癌颈部放疗的范围.方法选取156例经病理组织学确诊的N0期鼻咽癌患者,其中80例接受上颈预防照射(上颈照射组),76例接受全颈预防照射(全颈照射组).用Kaplan-Meier和log-rank法计算和比较两组的生存率.结果上颈照射组和全颈照射组的1、3、5年生存率分别是98.7%、90.7%、81.3%和97.3%、85.1%、78.4%(P＞0.05),1、3、5年无瘤生存率分别是89.3%、82.7%、72.0%和87.8%、79.7%、68.9%(P＞0.05),颈部复发率分别是5.0%和3.9%,两组比较差异无显著性(P＞0.05).结论对于颈淋巴结阴性的鼻咽癌患者只需作上颈部预防性照射.