Histopathology of the teeth in segmental odontomaxillary dysplasia: new findings

Histological examination of the deciduous teeth in two cases of segmental odontomaxillary dysplasia (SOMD) showed fibrous enlargement of the pulps, an irregular pulp/dentine interface displaying many pseudoinclusions and pulp stones. There were tubular defects in the coronal dentine from pulp horn to cusp tip, an irregular tubular structure to the circumpulpal dentine of the apical half, a focally deficient odontoblast layer and widespread external resorption. Together with the clinical features of unilateral maxillary enlargement, upper alveolar expansion in the distal segment, increased spacing and delayed eruption of the deciduous molars and absence of premolar teeth, these histological appearances allow distinction of this condition from fibrous dysplasia (FD), segmental hemifacial hypertrophy (SHH) and regional odontodysplasia (ROD).     

阿昔洛韦对单纯疱疹病毒脑炎小鼠脑细胞的保护作用

目的 了解单纯疱疹病毒脑炎(HSE)脑细胞结构的改变及药物的影响。方法 采用光学显微镜及透射电子显微镜观察HSE小鼠脑细胞结构的变化，并给予阿昔洛韦(ACV)及地塞米松(DEX)治疗，观察治疗后脑细胞结构的变化。结果 HSE小鼠脑神经细胞明显肿胀，核仁固缩，核内结构破坏，线粒体及高尔基体可见空泡样变性，核仁内可见病毒颗粒。用药物干预的小鼠脑神经细胞改变较轻微，未找到病毒颗粒；与单用ACV干预的小鼠相比，用ACV DEX干预的小鼠脑神经细胞及毛细血管周围水肿明显减轻。结论 HSE早期给予ACV DEX治疗，对HSE脑细胞结构有明显保护作用。     

宫颈上皮内瘤变108例临床分析

目的通过总结108例宫颈上皮内瘤变（CIN）的临床与预后，探讨分析CIN的诊断与治疗。方法归纳总结共108例各级CIN的临床特点及治疗方法，术前肉眼多点活检及阴道镜下活检与术后病理诊断的符合率，分析其预后。结果所有病人均有性生活史。除45／108（417％）无症状外，63／108（58．3％）有分泌物增多，或同房出血或阴道不规则流血。术前阴道镜下活检与术后病理诊断的符合率高于肉眼多．最活检符合率，但统计学差异无显著性，（P〉0．05）。根据病人要求、CIN级别及病变部位、范围采取不同的手术方式，其中14例随访超过5a，全部病人无1例复发，3、5a存活率均为100％。结论临床上对有性生活史的生育年龄妇女要警惕CIN，肉眼多点活检或阴道镜下活检可作为确诊手段，对不同的病人，依据病灶的性质，采用不同的手术方式，可避免复发，获100％的治愈率。     

Survivin在T细胞非霍奇金淋巴瘤组织中的表达及临床意义

【目的】了解生存蛋白Survivin在T细胞非霍奇金淋巴瘤（T—NHL）中的表达，以及Survivin表达与预后的关系。【方法】用免疫组化S-P法检测83例T细胞NHL组织Survivin表达情况，分析Survivin表达与预后的关系。【结果】Survivin表达阴性10例（12％），表达阳性73例（88％），Survivin表达与病理类型、性别、年龄、B症状、结外病变数、PS、分期、LDH水平、IPI等临床特征均无相关性（P〉0．05）。78例接受了化疗，大多数采用CHOP方案化疗，全组CR率45％，有效率86％，Survivin阴性者CR率60％，阳性者43％（P〉0．05）。中位随访22月（1—76月），全组5年生存率31％，Survivin表达阳性的T—NHL患者5年生存率明显低于Survivin表达阴性患者（21％比70％，P〈0．001）。多因素分析显示Survivin表达是T细胞NHL的独立预后指标。【结论】Survivin在T细胞NHL表达上调，Survivin阳性T—NHL患者5年生存率低于Survivin阴性者，Survivin表达可能为T细胞NHL预后的独立指标。     

Pollen extracts reduce the hepatotoxicity of paracetamol in mice

Cernitins are preparations obtained from plant pollen which contain numerous compounds of potential biological significance. This work deals with the influence of cernitins upon acute paracetamol toxicity in mice. The survival rate and indices of hepatic injury: aminotransferase and alkaline phosphatase activities, bilirubin level in serum, glutathione and cytochrome P-450 content in liver, liver weight, histopathologic picture of the liver and presence of glycogen and lipids in stained liver sections, under different experimental protocols, were determined. It was found that cernitins are able to increase the survival rate of mice and reduce liver injury in acute paracetamol poisoning. Cernitins are more effective when administered after, rather than before, a dose of paracetamol. The possible mechanism through which cernitins may act is discussed.     

Ultrasonography of rotator cuff tears: a review of 500 diagnostic studies

Ultrasonography of the rotator cuff has been shown to be of value in diagnosing rotator cuff tears. This report summarizes our experience with our first 500 diagnostic examinations. All patients were examined in the hyperextended internal rotation view with commercially available high-resolution real-time ultrasound equipment. Patients were diagnosed as having a rotator cuff tear if a focal echogenic lesion or a defect within the rotator cuff was identified. This study confirmed the value of ultrasonography for the diagnosis of rotator cuff tears. Accuracy, sensitivity, and specificity all exceeded 90%, and correlated with surgical findings. This was better than arthrography in the same patient population. Ultrasound is an accurate noninvasive method of examining the rotator cuff for the presence of tears. We suggest that rotator cuff ultrasonography is the procedure of choice for the diagnosis of tears if adequate instrumentation is available.     

冠心病同型半胱氨酸与其相关酶基因MTHFR、CBS多态性关系的研究

目的:探讨冠心病血浆同型半胱氨酸(Hcy)水平与其代谢相关酶MTHFR、CBS基因型的关系。方法:采用试剂盒法提取人基因组DNA;采用聚合酶链反应-限制性片段长多态性(PCR-RFLP)法检测MTHFR基因型,采用扩增阻滞实变体系法(ARMS)检测CBS基因型。结果:冠心病患者MTHFR基因型异常者Hcy水平明显高于MTHFR基因型正常者,有显著差异(P<0.05);在本研究中没有检测出CBS基因突变者。结论:MTHFR基因突变是引起血浆Hcy水平升高的主要原因。     

原发性胃肠道粘膜相关淋巴组织淋巴瘤47例临床病理分析

目的 探讨原发性胃肠道粘膜相关淋巴组织淋巴瘤(GIL-MALT)的临床病理特点。方法 回顾性分析1990～2000年我院经手术及病理证实的47例胃肠道MALT患者临床病理资料。结果 47例患者平均年龄57．2岁，男女比例2．1：1。以腹痛和发热为主。病变分布为胃32例，小肠4例，回盲部及盲肠5例，大肠6例。内窥镜下息内型15例，溃疡型25例，弥漫型7例。除1例为T细胞淋巴瘤，其余均为B细胞淋巴瘤。结论 胃肠道粘膜相关淋巴瘤以中老年为主，男性居多，临床误诊率较高。内窥镜下多次多点活检、深凿活检可提高本病的确诊率。