首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   671篇
  免费   53篇
  国内免费   3篇
耳鼻咽喉   6篇
儿科学   28篇
妇产科学   38篇
基础医学   46篇
口腔科学   26篇
临床医学   70篇
内科学   146篇
皮肤病学   14篇
神经病学   57篇
特种医学   31篇
外科学   153篇
综合类   6篇
预防医学   30篇
眼科学   17篇
药学   30篇
肿瘤学   29篇
  2023年   4篇
  2022年   12篇
  2021年   19篇
  2020年   10篇
  2019年   13篇
  2018年   31篇
  2017年   13篇
  2016年   22篇
  2015年   27篇
  2014年   24篇
  2013年   52篇
  2012年   56篇
  2011年   25篇
  2010年   36篇
  2009年   36篇
  2008年   43篇
  2007年   70篇
  2006年   48篇
  2005年   48篇
  2004年   36篇
  2003年   30篇
  2002年   17篇
  2001年   4篇
  2000年   1篇
  1999年   5篇
  1998年   3篇
  1997年   3篇
  1995年   2篇
  1993年   1篇
  1992年   2篇
  1990年   4篇
  1989年   9篇
  1988年   6篇
  1987年   1篇
  1985年   3篇
  1982年   1篇
  1981年   1篇
  1977年   2篇
  1975年   1篇
  1974年   1篇
  1973年   1篇
  1970年   1篇
  1884年   3篇
排序方式: 共有727条查询结果,搜索用时 484 毫秒
131.
132.
133.
Hydatid disease (HD) is a parasitosis caused by Echinococcus granulosus, which is still an important health problem worldwide, and our country is an endemic region for HD. There is little information regarding the role of human leucocyte antigen (HLA) in genetic susceptibility or resistance to HD. In this study, we aimed to investigate the HLA profile of Turkish children with HD and to compare them with healthy individuals. We also planned to investigate whether HLAs have a potential role in the predisposition to or prevention of the occurrence of HD and to study the relationship between the clinical features of HD and the HLA profile of the patients. The study included 81 children (25 boys, 56 girls) with HD aged between 3 and 18 years. All the patients’ and control subjects’ HLA class I and II antigens were examined, antigen allele frequencies were calculated, and clinical characteristics were also evaluated. The frequency of HLA-B18, -DR1, and -DR15 alleles were significantly different between the patients and healthy groups; HLA-DR15 antigen might be associated with HD occurrence, and the presence of HLA-B18 and HLA-DR1 antigens might be associated with HD resistance. Compared with the healthy group, patients with lung HD had a significant increase in HLA-B44 frequency, and liver HD patients had a significant increase in HLA-DR15 antigen frequency. Furthermore, presence of HLA-DR11 was found to be a significant factor associated with cure of the disease. We concluded that HLA types have significant impact on the development of HD and clinical course of disease.  相似文献   
134.
135.

Purpose

To present a case of spontaneous aortic rupture in the course of mantle cell lymphoma and successful management with endovascular repair.

Case Report

A 69-year-old woman presented with a cervical mass. The patient was found to have stage IIIA and Mantle Cell Lymphoma International Prognostic Index (MIPI) 4. She was placed in an intermediate-risk group. The patient received an initial cycle of systemic chemotherapy consisting of rituximab, anthracycline, vincristine and methyl prednisolone. During follow-up, she developed abdominal aortic rupture secondary to intramural hematoma which was successfully managed with endovascular exclusion.

Conclusion

Hemodynamic changes can be seen during the course of lymphoma subsequent to systemic chemotherapy. These changes might be related to the spontaneous rupture of the main vessels. Endovascular repair may be a more appropriate treatment option than open surgery, especially in a patient with multiple comorbidities.Key Words: Systemic chemotherapy, Abdominal aortic rupture, Lymphoma, Endovascular stent-graft repair  相似文献   
136.
Abstract:  Infantile acne is an uncommon condition in pediatric age. We determined the efficacy and safety of adapalene gel 0.1% in the treatment of infantile acne. Twelve patients were enrolled for adapalene gel 0.1% application once daily over a 16-week treatment period. Efficacy evaluation included counting the inflammatory and noninflammatory lesions by the physician and global evaluation of the improvement. After 16 weeks all patients were followed up for a 1-year period. The time of clearance of the infantile acne lesions was 3 months in four (33%) patients and 4 months in eight (67%) patients (median 3.4 months). Adapalene gel produced reductions in noninflammatory and inflammatory lesions counts. Limited side effects were observed and none of them required stopping the therapy. No patient was left with scarring. Three patients were showed mild lesions in the 1-year follow-up period. Adapalene gel 0.1% was found to be a highly effective and safe drug in the treatment of mild-to-moderate infantile acne.  相似文献   
137.
Objective: To compare refraction measurements of young patients obtained using Plusoptix S04 with those obtained using cycloplegic retinoscopy.Design: Cohort study.Participants: Data were collected from 64 patients (128 eyes), aged 2–19 years.Methods: All eyes underwent photorefraction using Plusoptix S04 with or without cycloplegia and cycloplegic retinoscopy. Eyes with a maximum spherical and cylinder range of −7.00 to +5.00 were excluded from the study.Results: The difference in spherical equivalents between Plusoptix S04 without cycloplegia and cycloplegic retinoscopy was more than ± 0.50 D in 70.2% of the eyes. In 100 eyes (78.1%), photorefraction underestimated the hyperopic refractive error. The cylinder powers determined by Plusoptix S04 and cycloplegic retinoscopy were similar. The difference in the spherical equivalents between Plusoptix S04 with cycloplegia and cycloplegic retinoscopy was + 0.50 D in 89.8% of the eyes. In 96 eyes (75%), photorefraction with cycloplegia overestimated the hyperopic refractive error. The difference in cylindrical power determined using Plusoptix S04 with cycloplegia and cycloplegic retinoscopy was statistically significant (paired ttest, p = 0.009).Conclusions: The statistically significant difference in spherical equivalent values obtained using Plusoptix S04 with or without cycloplegia and cycloplegic retinoscopy suggests that Plusoptix S04 is more in evaluating the cylinder power and axis in young patients. Our results also suggest that Plusoptix S04 is not an accurate tool to estimate the refraction in children.  相似文献   
138.

Objective

Non-specific heel pain (calcaneal apophysitis) is a common disorder, particularly in physically active growing children. Foot radiographs are usually obtained as part of the clinical evaluation in routine orthopaedic practice. However, there is still controversy about the specific findings on radiographs, and it is unclear what information is present on radiographs that may alter the diagnosis and management. The purpose of this study was to review a consecutive series of patients with the diagnosis of calcaneal apophysitis to assess the yield of routine radiographs of the foot.

Material and methods

A prospective study was performed on 61 consecutive patients with a diagnosis of calcaneal apophysitis in a single-surgeon practice. Standard anteroposterior and lateral weight-bearing foot radiographs were obtained for each patient. Seventy-one sets of foot radiographs were reviewed to determine whether radiographs had an impact on diagnosis and management. Patients with antecedent trauma, penetrating injury, foot deformity, achilles tendonitis, bursitis and infections were excluded from the study.

Results

Seventy foot radiographs were considered to be normal. The radiographs changed the diagnosis in only one patient, in whom a simple bone cyst of the calcaneous was seen.

Conclusion

Calcaneal apophysitis is a self-limiting disease, and patients can be treated conservatively. Neither the sclerosis nor the fragmentation of the apophysis could be used to establish the diagnosis of calcaneal apophysitis. Therefore, obtaining radiographs as an initial step in their evaluation does not seem to be justified.  相似文献   
139.

Introduction

A 51-year-old female was admitted to emergency unit with sudden loss of consciousness. Her blood glucose level from fingertip was 33 mg/dl, and insulin level was 55 (normal range, 4–17 IU). Abdominal ultrasonography revealed pancreatic mass with diffuse liver metastases. Biopsy of liver metastases showed differentiated neuroendocrine carcinoma.

Methods and Results

Diazoxide and chemotherapy stabilized her glucose level for more than 4 months. However, the disease showed progression, and death occurred 8 months later.

Conclusion

In conclusion, this case may suggest that biologic behavior may differ from histological behavior in insulinoma and platin-based systemic chemotherapy may provide some benefit in patients those who had diazoxide- and octreotide-resistant tumors.  相似文献   
140.
Objective: The purpose of this study was to correlate the histological diagnosis made during intraoperativefrozen section (FS) examination of hysterectomy samples with complex atypical endometrial hyperplasia (CAEH)diagnosed with definitive paraffin block histology. Methods: FS pathology results of 125 patients with a preoperativebiopsy showing CAEH were compared retrospectively with paraffin block pathology findings. Results:Paraffin block results were consistent with FS in 78 of 125 patients (62.4%). The FS sensitivity and specificityof detecting cancer were 81.1% and 97.9%, with negative and positive predictive values of 76.7%, and 98.4%,respectively. Paraffin block results were reported as endometrial cancer in 77 of 125 (61.6%) patients. Finalpathology was endometrial cancer in 45.3% patients diagnosed at our center and 76.9% for patients who hadtheir diagnosis at other clinics (p=0.018). Paraffin block results were consistent with FS in 62.4% of all casesConsistence was 98.4% in patients who had endometrial cancer in FS. Conclusion: FS does not exclude thepossibility of endometrial cancer in patients with the preoperative diagnosis of CAEH. In addition, sufficientendometrial sampling is important for an accurate diagnosis  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号