全文获取类型
收费全文 | 173192篇 |
免费 | 10405篇 |
国内免费 | 422篇 |
专业分类
耳鼻咽喉 | 2284篇 |
儿科学 | 5572篇 |
妇产科学 | 3646篇 |
基础医学 | 23610篇 |
口腔科学 | 7695篇 |
临床医学 | 12667篇 |
内科学 | 38670篇 |
皮肤病学 | 4447篇 |
神经病学 | 14420篇 |
特种医学 | 5320篇 |
外国民族医学 | 26篇 |
外科学 | 21569篇 |
综合类 | 1398篇 |
现状与发展 | 1篇 |
一般理论 | 60篇 |
预防医学 | 18205篇 |
眼科学 | 3245篇 |
药学 | 10622篇 |
中国医学 | 731篇 |
肿瘤学 | 9831篇 |
出版年
2023年 | 840篇 |
2022年 | 1637篇 |
2021年 | 3693篇 |
2020年 | 2478篇 |
2019年 | 3503篇 |
2018年 | 4978篇 |
2017年 | 3689篇 |
2016年 | 3454篇 |
2015年 | 4033篇 |
2014年 | 5488篇 |
2013年 | 6982篇 |
2012年 | 10921篇 |
2011年 | 11514篇 |
2010年 | 5780篇 |
2009年 | 5139篇 |
2008年 | 8851篇 |
2007年 | 9487篇 |
2006年 | 8778篇 |
2005年 | 9038篇 |
2004年 | 8549篇 |
2003年 | 7784篇 |
2002年 | 5811篇 |
2001年 | 5024篇 |
2000年 | 5072篇 |
1999年 | 4411篇 |
1998年 | 1548篇 |
1997年 | 1286篇 |
1996年 | 1276篇 |
1995年 | 1083篇 |
1994年 | 1074篇 |
1993年 | 980篇 |
1992年 | 2658篇 |
1991年 | 2568篇 |
1990年 | 2342篇 |
1989年 | 2336篇 |
1988年 | 2107篇 |
1987年 | 1952篇 |
1986年 | 1826篇 |
1985年 | 1756篇 |
1984年 | 1255篇 |
1983年 | 1010篇 |
1982年 | 568篇 |
1981年 | 518篇 |
1980年 | 495篇 |
1979年 | 925篇 |
1978年 | 608篇 |
1977年 | 477篇 |
1975年 | 544篇 |
1974年 | 545篇 |
1973年 | 545篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
The adrenal cortex gives rise to a biologically heterogenous group of neoplasms, each with a distinct morphology, antigen expression and molecular profile. Adrenal cortical adenomas have excellent prognosis and are usually cured by surgical resection alone, while adrenal cortical carcinomas are very aggressive tumors with a poor prognosis regardless of therapy. These tumors are rare and often challenging for a pathologist to diagnose, as significant overlap exists between benign and malignant lesions in some cases. In this review, we attempt to summarize most important histologic and clinical features of adrenal cortical adenomas and carcinomas, clarify the use of different grading systems, the use of special stains and the differential diagnosis for practicing pathologists. Most relevant hereditary syndromes associated with adrenal cortical tumors are listed. Updates in molecular alterations in adrenal cortical neoplasms and hyperplastic diseases as well as their clinical significance and potential therapeutic implications are also discussed. 相似文献
2.
3.
4.
5.
Selwyn Arlington Headley Nayara Emily Viana Mariana de Mello Zanim Michelazzo Ana Aparecida Correa Xavier Cícero Júlio Silva Costa Felipe Hideki Ogo de Pinho Marcelo Diniz dos Santos 《Transboundary and Emerging Diseases》2020,67(Z2):49-59
Neorickettsia helminthoeca (NH), the agent of salmon poisoning disease or canine neorickettiosis (CN), is a bacterial endosymbiont of the nematode Nanophyetus salmincola, and infections are spreading among specific fish‐eating mammalians. This article describes the pathologic and immunohistochemical findings associated with spontaneous NH‐induced infections in dogs from Southern Brazil. The principal pathologic findings were hypertrophy of Peyer patches and lymphadenopathy with lymphocytic proliferation, chronic interstitial pneumonia, and chronic enteritis associated with positive intralesional immunoreactivity to antigens of NH within macrophages and histiocytes. Positive immunoreactivity against canine parvovirus‐2 (CPV‐2) or/and canine distemper virus was not detected in the evaluated intestinal segments or in the samples from the cerebellum and lungs, respectively, from the dogs evaluated. These findings demonstrated that NH was involved in the enteric, pulmonary, and lymphoid lesions herein described, and provide additional information to confirm the occurrence of this bacterial endosymbiont within this geographical location. It is proposed that chronic pneumonia should be considered as a pathologic manifestation of NH‐induced infections. Additionally, our results show that the occurrences of CN seem to be underdiagnosed in Southern Brazil due to the confusion with the incidence of CPV‐2. 相似文献
6.
7.
8.
Lara Silveira Abdo Aguiar Rita de Cssia Rossini Lismary Aparecida de Forville Mesquita Gerson Dellatorre 《Journal of Cosmetic Dermatology》2019,18(6):1733-1736
Depigmented lesions may occur as postinflammatory sequelae of subacute cutaneous lupus erythematosus (SCLE), leading to great psychosocial impact. A 53‐year‐old male patient presented with post‐SCLE depigmented facial lesions after five years of disease stability. We proposed surgical treatment with melanocyte‐keratinocyte transplantation procedure (MKTP), and after five months the patient achieved 90% repigmentation, without Koebner phenomenon (KP). In theory, KP is a possible complication of MKTP procedure since the preparation of the receptor area involves the use of dermabrasion. In an attempt to avoid it, we suggest to maintain the treatment of the underlying disease and wait for a minimum period of disease stability before the procedure. 相似文献
9.
10.