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   2170篇
  免费   87篇
  国内免费   17篇
耳鼻咽喉   12篇
儿科学   37篇
妇产科学   158篇
基础医学   226篇
口腔科学   16篇
临床医学   169篇
内科学   595篇
皮肤病学   7篇
神经病学   236篇
特种医学   55篇
外科学   379篇
综合类   5篇
预防医学   57篇
眼科学   8篇
药学   152篇
中国医学   2篇
肿瘤学   160篇
  2023年   9篇
  2022年   28篇
  2021年   63篇
  2020年   38篇
  2019年   42篇
  2018年   64篇
  2017年   31篇
  2016年   53篇
  2015年   67篇
  2014年   85篇
  2013年   121篇
  2012年   162篇
  2011年   188篇
  2010年   106篇
  2009年   83篇
  2008年   156篇
  2007年   147篇
  2006年   151篇
  2005年   120篇
  2004年   105篇
  2003年   124篇
  2002年   109篇
  2001年   19篇
  2000年   30篇
  1999年   18篇
  1998年   14篇
  1997年   15篇
  1996年   6篇
  1995年   10篇
  1994年   11篇
  1993年   6篇
  1992年   7篇
  1991年   5篇
  1990年   6篇
  1989年   5篇
  1988年   9篇
  1987年   5篇
  1986年   3篇
  1985年   7篇
  1984年   2篇
  1983年   5篇
  1982年   10篇
  1981年   5篇
  1980年   6篇
  1979年   3篇
  1977年   2篇
  1976年   2篇
  1973年   2篇
  1970年   2篇
  1942年   2篇
排序方式: 共有2274条查询结果,搜索用时 15 毫秒
991.

Background

to assess the feasibility of minimally invasive surgery in the management of lymph-nodal recurrences of gynecological cancers, in terms of surgical and oncological outcomes.

Methods

we retrospectively collected patients with isolated lymph-nodal recurrent disease of gynecological malignancies who underwent to minimally invasive lymphadenectomy at Catholic University of the Sacred Hearth in Rome (Italy), from January 2013 to November 2017.

Results

Forty patients were considered eligible (31 LPS, 9 Robot); 24 (60.0%) with an ovarian cancer, 8 (20.0%) with a cervical cancer and 8 (20.0%) with an endometrial cancer recurrence. The most frequent site of lymph-nodal recurrence was represented by the aortic region (47.5%), while 18 patients (45.0%) experiencing pelvic lymph-nodal recurrence, 2 (5.0%) both pelvic and aortic relapse, and only 1 (2.5%) had an hepato-celiac lymph node recurrence. No patient required a laparotomic conversion. Median operative time was 220 min, median EBL was 80 mL, and median post-operative hospital stay was 2 days. There were 2 (5.0%) intra-operative and 4 (10.0%) post-operative complications, of which 2 were grade 3. The median follow-up was 22.5 months, and during this time 15 patients showed another relapse with a median time to progression of 12 months. Seven women died because of the disease. The 2-year post-relapse disease-free survival (PR-DFS) was 54.7%, and the 2-year post-relapse overall survival (PR-OS) was 79.3%.

Conclusions

In our experience minimally invasive surgery is a valid therapeutic approach in very select patients with localized lymph-nodal recurrence of gynecological cancers, with benefits about peri and post-operative morbidities and without compromising their oncological outcome.  相似文献   
992.

Background

This study aims at evaluating the feasibility, surgical outcome and oncological results observed after robotic radical hysterectomy (RH) compared to laparoscopy for patients with early stage cervical cancer (ECC) patients.

Methods

Between January 2010 and October 2016, 210 patients underwent RH for treatment of ECC: 70 underwent robotic approach (Cases), and 140 underwent laparoscopic approach (Controls).

Results

There was no statistically significant difference between the two approaches with regard to clinical patient characteristics and in terms of extent of RH and rate of pelvic and aortic lymphadenectomy. Operative time was significantly longer in the robotic versus laparoscopic group (median = 243 min, range 90–612 versus median = 210 min, range 80–660; p value = 0.008). Conversion to laparotomy was necessary in 4 patients (1.9%) in the whole series.No difference was found in terms of intraoperative and postoperative complications between the two groups. Overall, during the observation period, 34 (16.2%) patients experienced any grade postoperative complications, and 21 (10.0%) had >G2 complications.The 3-yr DFS was 88.0% versus 84.0% in robotic and laparoscopic group, respectively (p value = 0.866). Central and/or lateral pelvic disease represented the most common site of relapse. The 3-yr OS was 90.8% in patients underwent robotic RH versus 94.0% in patients underwent laparoscopic RH (p value = 0.924).

Conclusions

The present study shows the equivalence of robotic and laparoscopic approaches to radical surgery of ECC patients, in terms of perioperative and postoperative outcomes with equivalent survival figures, and thus the choice of approach can be tailored to the choice of patient and surgeon.  相似文献   
993.
994.

Objective

To evaluate effectiveness and safety of UFE as alternative to surgery, in treatment of uterine fibromatosis.

Methods/materials

255 patients (aged 26–55) with symptomatic UF, indication for surgery, followed in our center (2000–2014), single or multiple fibroids, pain and/or functional/compressive disorders, underwent embolization: injection of PVA particles (150–900 μm) from distal portion of uterine arteries (ascending section). Primary end-point: flow-stop distally to injection site, disappearance of lesion design, preservation of flow in main trunk of UA. Secondary end-point: control of pain and functional/compressive disorders during follow-up (2–7 years).

Results

Procedure was performed bilaterally in 250 patients (98%). Mean duration: 47 min (average fluoroscopy: 10:50 min). Post-embolization pelvic pain (according with VAS score) was on average 2.2 at discharge (24 h). Follow-up at 2 years: resolution of menstrual disorders in 78% of patients and improvement in 14%; pain disappeared in 66%; significant improvement of menstrual flow and HCT/HB levels, decrease in total uterine (57.7%)/dominant fibroid (76.1%) volume. Recurrence in 18 patients.

Conclusions

UFE represents an excellent alternative to surgical treatment: it is safe, tolerable and effective both in short and long term, with evident advantages in economic and social terms.
  相似文献   
995.

Purpose

To develop, on behalf of Associazione Italiana di Oncologia Medica and Società Italiana di Malattie Infettive e Tropicali, evidence-based and practical recommendations for the management of cancer patients who are Hepatitis C virus (HCV)-positive and are undergoing antitumor treatment.

Methods

Recommendations were generated by panel of experts selected by the boards of the Societies Associazione Italiana di Oncologia Medica and Società Italiana di Malattie Infettive e Tropicali (4 oncologists and 6 infectious disease and hepatology specialist). The level of evidence and grade or recommendation was assessed according to the Grading of Recommendations Assessment, Development and Evaluation for practice guidelines [5]: A (high), B (moderate), and C (low), together with 2 recommendation levels: 1 (strong), and 2 (weak). Experts provided additional information, which helped greatly in clarifying some issues in the absence of clear-cut information from the literature. The final draft was then submitted to the evaluation of experts and the text modified according to their suggestion and comments.

Results

HCV screening rates are low in patients with malignancies. The risk of reactivation or exacerbation of hepatitis C is higher in patients receiving immunosuppressive agents. It may be difficult to discriminate naturally occurring cancer-related complications from true reactivation or exacerbation of hepatitis C and hepatotoxicity due to cancer treatment. No conclusive data are available concerning the appropriate monitoring of liver function and when an antiviral regimen should be proposed.

Conclusions

Patients at risk of any flare of HCV-related liver disease during active therapy for cancer should be managed with a multidisciplinary approach where all relevant diagnostic techniques and therapeutic resources are available. Prospective studies are needed to identify optimal strategies for the management of HCV infected cancer patients.  相似文献   
996.
BACKGROUND: The study was designed to compare local anaesthesia and conscious sedation for outpatient bipolar operative hysteroscopy in terms of pain control and patients' satisfaction. METHODS: A prospective multicentre randomized study was carried out in university hospitals and in a private endoscopy unit. A total of 166 women with surgically treatable lesions associated with infertility or abnormal uterine bleeding was considered eligible for the study. Patients were randomized, using a computer-generated randomization list, into two groups. Group A (82 patients) underwent operative hysteroscopy with local anaesthesia. Group B (84 patients) received conscious sedation. Operative hysteroscopy was performed with a bipolar electrosurgical device to cut, vaporize and coagulate. Main outcome measures were pain control during the procedure, the post-operative pain score at 15 and 60 min, and at 24 h after the procedure, and patients' satisfaction rate. RESULTS: All procedures were completed within 35 min, the amount of saline used varied from 400-1200 ml. There were no significant differences between local anaesthesia and conscious sedation in terms of pain control during the procedure and in postoperative pain at different intervals. Satisfaction rate was similar in the two groups. CONCLUSIONS: Both local anaesthesia and conscious sedation can be used for operative hysteroscopy using a bipolar electrosurgical system without significant differences in terms of pain control and patients' satisfaction.  相似文献   
997.
Alzheimer disease (AD) is the most common neurodegenerative disorder of aging. Identifying novel AD genetic risk factors is important for understanding its pathogenesis. A recent study demonstrated that the deletion of adenosine in the promoter region of the presenilin 2 gene (PS2) is a susceptibility factor for early-onset AD. The objective of our study was to test the possibility that this variation is associated with AD in the Italian population. A case-control association study was performed, using 200 sporadic AD cases and 160 normal controls matched by age, gender and ethnicity. The current study does not support the notion that the polymorphism in the PS2 gene constitutes a risk factor for either late-onset or early-onset AD, which means that other genetic factors play a role in the development of AD in the Italian population.  相似文献   
998.
Annals of Nuclear Medicine - Cartilaginous bone tumors represent a wide variety of neoplasms ranging from benign to extremely aggressive malignant lesions. Unlike other tumors, the biopsy cannot...  相似文献   
999.
Pediatric Radiology - Osteoid osteoma is a benign and painful musculoskeletal tumour that usually affects children. Current standard treatment is CT-guided radiofrequency ablation, a minimally...  相似文献   
1000.
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