经皮双针囊内注射类固醇治疗小儿孤立性骨囊肿

目的探讨经皮双针囊内注射类固醇治疗小儿孤立性骨囊肿的疗效. 方法 1996年1月～2004年1月,对28例小儿孤立性骨囊肿,在X线透视下,将2根细的骨穿针或腰穿针分别自囊腔顶部和底部刺入骨囊肿内,抽去囊液,冲洗囊腔后注入类固醇. 结果 27例随访10～62个月,平均28个月,无并发症发生.根据Chigira等X线骨囊肿愈合评价标准,Ⅳ级20例,Ⅲ级5例,Ⅱ例1例,Ⅰ级1例,治愈率92.6%(25/27).25例骨囊腔愈合时间3～10个月,平均4.5个月. 结论经皮双针囊腔内注射类固醇适合于小儿孤立性骨囊肿,简单,安全,治愈率高.     

椎弓根固定结合椎体成形术治疗胸腰椎爆裂骨折

目的探讨椎弓根固定结合经椎弓根椎体内植骨行椎体成形术治疗胸腰椎爆裂骨折的疗效。方法采用椎管环形减压、短节段椎弓根螺钉系统固定结合经椎弓根椎体内植骨治疗胸腰椎爆裂骨折116例,其中93例获得随访。术前及术后随访行X线和CT检查,测量伤椎椎体中央高度值,比较植骨后椎体高度的恢复程度,同时观察植骨融合情况。采用配对t检验方法进行统计学分析。结果93例患者术后平均随访24.2个月,90%以上患者伤椎椎体高度恢复并维持良好,无塌陷。伤椎椎体中央高度值犤T12(3.14±0.41)cm,L1(3.33±0.34)cm犦与正常值犤(T12(3.26±0.38)cm,L1(3.47±0.61)cm)犦比较,差异无显著性意义(P>0.05)。未出现植骨操作引起的神经血管并发症。CT显示椎体内植骨块边缘模糊,融合良好,植骨块无吸收现象。结论后路椎管环形减压及内固定时,经伤椎椎弓根进行椎体内植骨行椎体成形术可恢复伤椎椎体高度,重建前、中柱的稳定性,预防术后椎体塌陷的发生。     

冠状CT扫描对颅脑疾患的诊断意义

作者通过对30例颅脑疾患冠状CT扫描资料进行研究,提出在一定情况下,在横断CT扫描的基础上,加用冠状CT扫描或冠矢重建图象,对病变的精确定位、病变的起源和发展方向以及病变与周围结构的关系等很有裨益。     

Warping of cross sections in the torsion of long bones with internal fracture fixation plates

Torsion of noncircular beams results in warping of each cross section. When noncircular cross sections are constrained to remain plane, the resulting shear stress distribution is different from what Saint Venant torsion (with warping) would predict. This has practical implications to the stress analysis of plated long bones subjected to torsional loadings. Analyses in which warping is not allowed predict incorrect stress fields in the plate and bone and overpredict the amount of stress shielding associated with fracture plate fixation.     

Immunohistochemical localization of cathepsin D, proliferating cell nuclear antigen and epidermal growth factor receptor in human breast carcinoma analysed by computer image analyser: correlation with histological grade and metastatic behaviour

 

Aims:

The purpose of this study is to examine the relationship between immunohistochemical localization of cathepsin D (CD), proliferating cell nuclear antigen (PCNA) and epidermal growth factor receptor (EGF-R) in 65 cases of breast carcinoma in Japanese women and traditional prognostic factors such as histological grade, lymph node status, mitotic rate and clinical stage, in order to possibly identify some indicator(s) that may be specifically associated with prognosis.  

Methods and results:

Serial sections of 5-μm thick were cut from the archival formalin-fixed, paraffin-embedded tissue blocks, and processed for CD, PCNA and EGF-R immunostaining. The results were analysed by computer-based image analysis system. All samples showed a positive immunoreaction for cathepsin D in both the parenchyma and stroma. However, the staining area and intensity varied from cell to cell in the parenchyma and stroma as well as among samples. Subsequently, the evaluation of immunostaining for CD was separately performed in both the parenchyma and stroma (CDpar and CDstr, respectively) and the combination of both components (CDtotal). PCNA and EGF-R showed positive immunostaining almost exclusively in the parenchymal component of the carcinoma tissue specimens. CDtotal significantly correlated with the histological grade, PCNA index (PI), mitotic rate (MR), EGF-R and lymph node metastasis. Significant correlation was also demonstrated between CDpar and the histological grade, EGF-R and lymph node metastasis, or between CDstr and MR, EGF-R and lymph node metastasis. EGF-R correlated highly with the histological grade, MR score, lymph node metastases and recurrence-free survival.  

Conclusions:

Both the CD parameters and EGF-R are valuable indicators for predicting the biological behaviour of human breast carcinoma.     

Cytomorphometric analysis of vaginal cells during normal cycle, under oral contraceptive therapy or in-vitro fertilization stimulation protocol

A cytomorphometric analysis of superficial vaginal cells inwomen in three groups of different types of hormonal concentrationwas made. There were 15 women in each group. Group I was studiedduring a natural cycle, group II under oral contraceptive therapyand group III during an in-vitro fertilization (IVF) stimulationprotocol. Morphometric parameters were measured on an imageanalyser. The area, perimeter and several form factors weremeasured separately for nuclei and cytoplasm. The nucleus:cytoplasmicratio was also determined. The cytoplasmic area was significantlyreduced in group II and was associated with a statisticallysignificant reduction of the nuclear area. The nucleus:cytoplasmicratio appeared significantly increased in group II and reducedin group III. Low oestradiol impregnation obtained with an oralminidosed contraceptive interfered with vaginal cell maturation.High oestradiol concentrations obtained during IVF protocolsinduced marked nuclear pycnosis but did not induce supra-physiologicalcell enlargement. Maximal cell size is genetically regulatedaccording to Driesch's law of volume invariance and hormonalover-stimulation has no effect on cell size. The nucleus:cytoplasmicratio appears to be a powerful parameter reflecting the oppositeeffects of hormones on cell compartments.     

双头加压螺纹钉贴股骨距内固定治疗股骨颈骨折

在Ｘ光电视下采用双头加压螺纹钉贴股骨距内固定治疗新鲜股骨颈骨折４２例，随访平均２．５年，其中１６例随访３年以上，骨折愈合率９５．２％，骨折不愈合并股骨头缺血性坏死率４．７６％。认为加压螺纹钉贴股骨距内固定可使钉的受力由较大剪应力变为较大轴向力承受，减少骨折处的剪应力，并加压于骨折端能促进骨折愈合。具有操作简单、进钉准确、创伤小、固定牢靠、并发症少等优点。     

Prevention of early postmenopausal bone loss using low doses of conjugated estrogens and the non-hormonal,bone-active drug ipriflavone

Hormone replacement therapy is the optimal therapeutic choice for postmenopausal syndrome. While low doses of estrogens (0.3 mg/day of conjugated estrogens) can counteract neurovegetative menopausal symptoms, higher doses (0.625 mg/day of conjugated estrogens) are required to prevent bone loss in postmenopausal women. Experimental and clinical studies have shown that ipriflavone, a non-hormonal isoflavone derivative, is effective in the prevention and treatment of postmenopausal osteoporosis. The aim of the present investigation was to evaluate the efficacy and toler-ability of ipriflavone and very low doses of equine conjugated estrogens on bone loss in early postmenopausal women. Eighty-three healthy postmenopausal women (50.3±0.7 years) were enrolled for this 1-year multicenter study. All subjects were randomly allocated to receive: double placebo (n=24; group A), placebo plus conjugated equine estrogens 0.30 mg/day (n=31; group B) or conjugated equine estrogens 0.30 mg/day plus oral ipriflavone 200 mg tris in die at meals (n=28; group C), according to a double-masked design. Among women who completed the treatment period (valid completers), those of group A showed a progressive decrease in forearm bone density (FBD; measured by dual photon absorptiometry) that reached 1.7% after 12 months. The women in group B maintained their FBD in the first 6 months of treatment but, at the end of the study, showed a bone loss of 1.4% compared with basal values. By contrast, women in group C showed a significant increase in FBD after 1 year of treatment (+5.6%;p<0.01). Bothvalid completers andintention to treat analyses revealed a significant difference (p<0.05) between group A and group C over the study period. None of the treatments produced significant changes of biochemical markers of bone turnover, while hot flushes and other climacteric symptoms were significantly reduced after the sixth month of treatment in women receiving estrogens. Adverse events were generally mild, and did not differ among the groups. The results of this study suggest that low doses of estrogens combined with ipriflavone could represent a new therapeutic approach to the treatment of the postmenopausal syndrome.     

牛骨形成蛋白在骨不连中的临床应用

应用牛骨形成蛋白（ｂｏｖｉｎｅＢｏｎｅＭｏｒｐｈｏｇｅｎｅｔｉｃＰｒｏｔｅｉｎ简称ｂ－ＢＭＰ）成功的治愈１３例骨不连病人。经过１３个月～２９个月随访观察，效果较好。本组病人术前平均已做过１．５次手术。１３例病人中，有１２例被１次治愈。１例病人再次行内固定加用牛骨形成蛋白的植入也被治愈。骨形成蛋白的应用方式，采用同锻石膏复合后植入骨不连处。平均每个病人植入１００ｍｇＢＭＰ，１３例病人平均治愈时间为４．７个月。术后没有任何并发症。     

Ridge number density: A new parameter for in vivo bone structure analysis

An advanced analysis of the mechanical properties of bone should include information about the microarchitecture of cancellous bone in addition to its density. It has recently been shown that high-resolution quantitative computed tomography and magnetic resonance imaging have the potential to assess such information in a noninvasive way in patients. Both techniques, however, lack sufficient spatial resolution to image the individual trabeculae with true precision. In this work, a new parameter, Ridge number density (RND), is introduced. RND is a measure for the trabecular number, which can be extracted directly from high-resolution three-dimensional (3D) images of patients. We applied the RND technique to a test group of nine healthy, postmenopausal women measured repetitively with a high-resolution 3D peripheral quantitative computed tomography (3D-pQCT) system with 165 × 165 × 165 μm³ voxel size. Simultaneously with the RND determination, the trabecular bone density (TBD) was also assessed in the same volume of interest. The examination site was the distal radius. The intersubject variability of the measured test group was 10.5% for RND and 26.3% for TBD. The root mean square error between first and second examinations (midterm reproducibility) was 1.6% and 1.1%, respectively. RND is determined independently from TBD and pertains to the structure of the cancellous bone. As such, it might add crucial information in cases where bone mass or bone density measurements alone give ambigous results.