全文获取类型
收费全文 | 8580篇 |
免费 | 361篇 |
国内免费 | 177篇 |
专业分类
耳鼻咽喉 | 309篇 |
儿科学 | 431篇 |
妇产科学 | 241篇 |
基础医学 | 526篇 |
口腔科学 | 504篇 |
临床医学 | 882篇 |
内科学 | 718篇 |
皮肤病学 | 130篇 |
神经病学 | 561篇 |
特种医学 | 665篇 |
外科学 | 2163篇 |
综合类 | 1043篇 |
预防医学 | 202篇 |
眼科学 | 158篇 |
药学 | 279篇 |
5篇 | |
中国医学 | 72篇 |
肿瘤学 | 229篇 |
出版年
2024年 | 8篇 |
2023年 | 90篇 |
2022年 | 143篇 |
2021年 | 269篇 |
2020年 | 222篇 |
2019年 | 190篇 |
2018年 | 165篇 |
2017年 | 217篇 |
2016年 | 232篇 |
2015年 | 234篇 |
2014年 | 470篇 |
2013年 | 516篇 |
2012年 | 411篇 |
2011年 | 433篇 |
2010年 | 407篇 |
2009年 | 482篇 |
2008年 | 489篇 |
2007年 | 453篇 |
2006年 | 455篇 |
2005年 | 415篇 |
2004年 | 333篇 |
2003年 | 288篇 |
2002年 | 211篇 |
2001年 | 204篇 |
2000年 | 163篇 |
1999年 | 161篇 |
1998年 | 144篇 |
1997年 | 142篇 |
1996年 | 135篇 |
1995年 | 121篇 |
1994年 | 97篇 |
1993年 | 97篇 |
1992年 | 82篇 |
1991年 | 80篇 |
1990年 | 80篇 |
1989年 | 57篇 |
1988年 | 48篇 |
1987年 | 51篇 |
1986年 | 40篇 |
1985年 | 66篇 |
1984年 | 44篇 |
1983年 | 20篇 |
1982年 | 33篇 |
1981年 | 32篇 |
1980年 | 25篇 |
1979年 | 25篇 |
1978年 | 10篇 |
1977年 | 12篇 |
1976年 | 6篇 |
1973年 | 4篇 |
排序方式: 共有9118条查询结果,搜索用时 156 毫秒
51.
A mesenteric cyst with milk of calcium in an adult patient is presented. Preoperative evaluation included plain film, ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI). To our knowledge, the presence of milk of calcium in a mesenteric cyst has not been previously described. 相似文献
52.
53.
小切口手术治疗肾囊肿14例体会 总被引:1,自引:1,他引:0
目的分析讨论应用小切口手术治疗单纯性肾囊肿的临床特点及体会。方法总结自1996年1月至2004年10月14例应用小切口手术行囊肿去顶术的临床资料。结果小切口手术组14例,囊肿单发均位于肾中下极及中部背侧,手术时间30~90m in,术后未发生并发症,住院日5~8d。随访半年~1年均无复发。结论小切口手术治疗单纯肾囊肿具有手术操作简便、创伤小、恢复快、降低住院日等优点,适用于肾中下极及肾中部背侧的单纯肾囊肿。 相似文献
54.
坐骨结节囊肿的CT诊断 总被引:9,自引:0,他引:9
目的 探讨坐骨结节囊肿的CT表现及CT扫描的诊断价值。方法 回顾性分析12例经手术及病理证实的坐骨结节囊肿的CT表现。所有病例均摄骨盆正位X线平片及行CT平扫,其中2例尚行CT增强扫描。结果 12例骨盆正位片示坐骨结节骨质及其附近软组织均未见异常改变;CT平扫于坐骨结节与臀大肌之间的间隙内可见单个多房囊性水样密度肿块,边欠清,其横断面略呈锥形,锥尖朝前。增强扫描示肿块内无明显强化,但分隔及边缘可有轻度强化,且厚薄不均。结论 坐骨结节囊肿的CT表现较有特征性,CT扫描具有极高的诊断价值。 相似文献
55.
Mesenteric cyst is one of the rarest abdominal tumours, with approximately 820 cases reported since 1507. The incidence varies from 1 per 100000 to 250000 admissions. The lack of characteristic clinical features and radiological signs may present great diagnostic difficulties. The cyst may present in one of three ways: (i) non-specific abdominal features; (ii) an incidental finding; or (iii) an acute abdomen. Abdominal pain is the major presenting symptom. Abdominal mass is found in more than 50% of cases and 40% of cases are discovered incidentally. More than one aetiological mechanism is probably involved in the development of mesenteric cysts. Mesenteric cysts have been reported from the duodenum to the rectal mesentery but are most commonly located in the ileal mesentery. Malignant cysts occur in less than 3% of cases. Enucleation of the cyst is the treatment of choice. Knowledge of these tumours is important due to the various complications associated with suboptimal surgical management. Two cases of mesenteric cysts are presented including a recurrent mesenteric cyst in a post-partum woman demonstrating the inferior technique of internal marsupialization. The association of mesenteric cyst with pregnancy is discussed. 相似文献
56.
Masashi Kimura M.D. Kenji Shirakura M.D. Atsushi Hasegawa M.D. Yasukazu Kobayashi M.D. Eiichi Udagawa M.D. 《Arthroscopy》1992,8(4):419-423
An arthroscopic and anatomical investigation was performed to define the abnormal conditions of the popliteal tendon area in a lateral meniscus. Arthroscopic findings for 100 patients and anatomical observations of 10 amputated knees were analyzed. Five of the 10 dissected menisci were also examined histologically. Menisco-tibial coronary ligaments were classified into two types, as follows: type I--a coronary ligament covering an entire popliteal tendon beneath the meniscus; type II--a popliteal tendon visible beneath the meniscus through defects of the coronary ligament. Twenty-one of 100 cases were classified as type I, and 79 were classified as type II. Three of the 10 anatomical dissections were type I, and the remaining 7 were type II. Menisci in which the type I coronary ligaments were thought to be torn and menisci with type II coronary ligaments showed a rather marked mobility, but no conclusion could be reached. 相似文献
57.
58.
Introduction The authors report a case of interhemispheric ependymal cyst accompanied with agenesis of the corpus callosum in a fetus.
Discussion Routine ultrasound and subsequent magnetic resonance imaging of a 20-year-old woman at 33 weeks and 1 day of gestation detected
a large interhemispheric cystic lesion in the fetal cranial cavity. Caesarian section was carried out at 36 weeks because
of the progressive enlargement of the fetal head. The cyst was multiloculated and a cyst peritoneal shunt placement resulted
in collapse of the drained cyst components followed by enlargement of others. After wrack-a-mole-like shunt revisions, open
surgery was performed at the age of 2 years. Cyst walls were fenestrated and the cavities were communicated with each other
and eventually with the lateral ventricle. Pathological diagnosis of the cyst wall was ependymal cyst. The boy is now 3 years
old, and growing without apparent developmental delay or recurrence. Current concept and management policy of the interhemispheric
cyst accompanied with agenesis of the corpus callosum is reviewed. 相似文献
59.
TAKAHIRO YOSHIDA TETSUYA TAKAO AKIRA TSUJIMURA HIROHIKO TOMITA KATSUYUKI AOZASA AKIHIKO OKUYAMA 《International journal of urology》2006,13(4):478-480
A 38-year-old Japanese man was referred to our outpatient clinic for treatment of infertility. Semen analysis showed azoospermia. Chromosome analysis revealed a 47XXY karyotype, and non-mosaic Klinefelter's syndrome (KFS) was diagnosed. Upon physical examination, the patient's right testicular volume was 30 mL and the left testicular volume was 3 mL. Laboratory tests showed normal levels of lactate dehydrogenase, alpha-fetoprotein, and human chorionic gonadotropin beta-subunit. The plasma luteinizing hormone and follicle-stimulating hormone levels were increased to 15.7 mIU/mL and 45.9 mIU/mL, respectively. The plasma testosterone was decreased to 0.25 ng/mL. Magnetic resonance imaging showed a right testicular mass of low-signal intensity on the T1-weighted image and of high-signal intensity on the T2-weighted image. Therefore, the final diagnosis was KFS with a right testicular tumor. Thus, a right high orchiectomy was performed. Histological examination revealed an epidermoid cyst of the right testis. Epidermoid cysts in cases of KFS are rare. To our knowledge, only seven cases, including ours, have been reported in the literature. 相似文献
60.
目的探讨原发纵隔囊肿影像表现特征,提高影像诊断的准确率。方法回顾性分析经手术病理证实且资料完整的42例原发纵隔囊肿的影像学表现。所有病例均摄胸部后前位与侧位片,胸部CT平扫29例,其中15例行增强扫描,胸部MRI平扫6例。观察病变的部位、大小、形态、密度(信号)、边缘、壁及其厚度、邻近结构。每一病种均分为影像征象典型与不典型2类。结果病变位于前纵隔28例,中、后纵隔各7例。上纵隔9例,中纵隔24例,下纵隔9例。支气管囊肿9例,囊性淋巴管瘤4例,胸腺囊肿11例,心包囊肿5例,成熟性囊性畸胎瘤13例。影像征象典型38例,不典型4例。结论90%的纵隔囊肿,根据CT、MRI显示的病变部位与内部密度、信号特征,可做出正确的影像诊断;不典型者确诊仍依靠手术病理。 相似文献