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   475篇
  免费   49篇
儿科学   85篇
妇产科学   3篇
基础医学   86篇
口腔科学   19篇
临床医学   9篇
内科学   113篇
皮肤病学   3篇
神经病学   24篇
特种医学   14篇
外科学   47篇
综合类   2篇
预防医学   13篇
眼科学   8篇
药学   47篇
肿瘤学   51篇
  2024年   2篇
  2023年   5篇
  2021年   6篇
  2020年   6篇
  2019年   13篇
  2018年   16篇
  2017年   7篇
  2016年   5篇
  2015年   14篇
  2014年   14篇
  2013年   24篇
  2012年   22篇
  2011年   19篇
  2010年   13篇
  2009年   13篇
  2008年   22篇
  2007年   24篇
  2006年   17篇
  2005年   25篇
  2004年   12篇
  2003年   12篇
  2002年   23篇
  2001年   14篇
  2000年   18篇
  1999年   29篇
  1998年   8篇
  1997年   5篇
  1996年   3篇
  1995年   7篇
  1994年   8篇
  1993年   2篇
  1992年   12篇
  1991年   18篇
  1990年   16篇
  1989年   12篇
  1988年   8篇
  1987年   10篇
  1986年   7篇
  1985年   3篇
  1982年   4篇
  1981年   5篇
  1980年   3篇
  1979年   2篇
  1978年   4篇
  1975年   1篇
  1974年   1篇
  1971年   1篇
  1970年   2篇
  1966年   1篇
  1965年   1篇
排序方式: 共有524条查询结果,搜索用时 15 毫秒
91.
92.
We report a 6-month-old infant with pulmonary atresia with ventricular septal defect who was successfully treated with a novel technique of percutaneous major aortopulmonary collateral artery (MAPCA) banding with a covered stent. He suffered from heart failure due to a residual MAPCA of 4.5 mm in diameter. A covered stent tied with 2 5–0 size nylon threads was successfully deployed into the MAPCA in a dumbbell shape with a banding diameter of 2.8 mm. Banding covered stent implantation is a useful method to reduce the pulmonary blood flow in patients with MAPCA, which could be a less-invasive alternative to surgery.  相似文献   
93.

Background

Langerhans cell histiocytosis (LCH) is a clonal disease with focal or disseminated lesions that may compress the surrounding tissues, including the spinal cord. Because few reports have described the spinal symptoms as the first manifestation of pediatric LCH, the long-term neurological outcomes remain unclear.

Case report and literature review

We report a 21-month-old boy who presented with sudden-onset paraplegia. Imaging analyses revealed that osteolytic lesions and epidural tumors compressing the spinal cord at the T7-9 vertebrae. Twelve days after he developed leg weakness, emergency radiotherapy was started after a tumor biopsy. During the course of radiotherapy, paralysis steadily ameliorated. After we excluded infections and determined the pathological diagnosis of LCH, multi-drug chemotherapy was started. Apparent improvement in his complete paraplegia was observed after a total 15?Gy of radiotherapy and subsequent chemotherapy, leaving no neurological sequelae at 4?years of age. Through a literature search of studies published from 1980 to 2017, we found that children with LCH showed a generally favorable recovery from neurological dysfunction after the acute phase of spinal symptoms.

Conclusion

This report underscores the utility of emergency radiotherapy for the neurological recovery of spinal LCH in infants. Our long-term observation further denotes the value of this treatment in terms of the intact survival with preserved motor functions and physical growth.  相似文献   
94.

Background

The purpose of this study was to clarify the effect of preoperative chemoradiotherapy (CRT) for esophageal cancer on the postoperative course, and to determine the clinical significance of salvage esophagectomy after definitive CRT.

Methods

Based on their preoperative treatment, 477 patients with esophageal cancer were classified into three groups: 253 patients who received surgery alone (Group I), 197 who received planned CRT (30?C45?Gy, Group II), and 27 who received a salvage esophagectomy (radiation ??60?Gy, Group III).

Results

Postoperative complications developed in 25, 40, and 59% of the patients in Groups I, II, and III, respectively, with pulmonary complications developing in 10, 15, and 30%, and anastomotic leakage developing in 13, 23, and 37%, respectively. Mortality rates were 2.4, 2.0, and 7.4%, respectively. Multivariate analysis revealed preoperative therapy to be an independent factor associated with postoperative risks: the odds ratios (ORs) of Groups II and III compared to Group I were 1.8 and 4.0 for pulmonary complications, while they were 1.9 and 2.8, respectively, for anastomotic leakage. No critical complications developed in the 14 patients who received salvage surgery performed with strict surgical indications after 2005. The survival of Group III was not significantly different from that of Groups I and II. Most patients who received an R1/R2 resection after definitive CRT died within 2?years after salvage surgery.

Conclusions

Preoperative CRT is associated with postoperative complications especially in patients with R2 resection, while long-term survival can be achieved after R0 resections. Salvage surgery should be considered for carefully selected patients in whom R0 resection can be achieved.  相似文献   
95.
96.
97.
Purpose: To investigate the interval between low-dose radiotherapy and radiation-induced cataracts, and the factors affecting this interval, in patients with lymphoproliferative disease of the ocular adnexa. Methods: A retrospective case series of 73 eyes of 59 patients who underwent radiotherapy from 1996 to 2005 with total doses ranging from 24 to 30 Gy was conducted. We investigated the relationships between the radiation-associated cataract formation intervals and age, gender, diabetes, and the use of corticosteroids. Results: The mean interval was 36 months. None of the patients with lens shield developed cataracts. Age was inversely and significantly and gender was not significantly associated with the interval from first radiotherapy to cataract occurrence. The intervals did not differ significantly according to the presence of diabetes and corticosteroid therapy. Conclusions: The mean interval from the start of radiation therapy to radiation-related cataract formation was 36 months and age was a significant factor affecting this interval.  相似文献   
98.
We report a case of postoperative recurrence of adenoid cystic carcinoma in the left parotid gland treated with radiotherapy and arterial infusion chemotherapy. A 52-year-old woman had a history of surgical resection for an adenoid cystic carcinoma arising from the left parotid gland 25 years before. Despite two reoperations for local recurrence after the initial surgery, she had a third local recurrence in the remnant of the left parotid gland. The patient was treated with a concurrent combination of radiotherapy (60 Gy/30F) and intraarterial infusion chemotherapy with carboplatin (750 mg/30 days) from which she obtained a complete response. The patient has remained free of local progression 54 months after treatment. Radiotherapy and arterial infusion chemotherapy is effective treatment for local recurrence of adenoid cystic carcinoma in the head and neck.  相似文献   
99.
100.
The purpose of this study was to evaluate the treatment outcomes of stereotactic body radiotherapy (SBRT) for Stage I small-cell lung cancer (SCLC). From April 2003 to September 2009, a total of eight patients with Stage I SCLC were treated with SBRT in our institution. In all patients, the lung tumors were proven as SCLC pathologically. The patients'' ages were 58–84 years (median: 74). The T-stage of the primary tumor was T1a in two, T1b in two and T2a in four patients. Six of the patients were inoperable because of poor cardiac and/or pulmonary function, and two patients refused surgery. SBRT was given using 7–8 non-coplanar beams with 48 Gy in four fractions. Six of the eight patients received 3–4 cycles of chemotherapy using carboplatin (CBDCA) + etoposide (VP-16) or cisplatin (CDDP) + irinotecan (CPT-11). The follow-up period for all patients was 6–60 months (median: 32). Six patients were still alive without any recurrence. One patient died from this disease and one died from another disease. The overall and disease-specific survival rate at three years was 72% and 86%, respectively. There were no patients with local progression of the lesion targeted by SBRT. Only one patient had nodal recurrence in the mediastinum at 12 months after treatment. The progression-free survival rate was 71%. No Grade 2 or higher SBRT-related toxicities were observed. SBRT plus chemotherapy could be an alternative to surgery with chemotherapy for inoperable patients with Stage I small-cell lung cancer. However, further investigation is needed using a large series of patients.  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