全文获取类型
收费全文 | 3771篇 |
免费 | 182篇 |
国内免费 | 31篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 84篇 |
妇产科学 | 34篇 |
基础医学 | 901篇 |
口腔科学 | 49篇 |
临床医学 | 177篇 |
内科学 | 760篇 |
皮肤病学 | 144篇 |
神经病学 | 359篇 |
特种医学 | 108篇 |
外科学 | 521篇 |
综合类 | 10篇 |
预防医学 | 68篇 |
眼科学 | 127篇 |
药学 | 216篇 |
中国医学 | 7篇 |
肿瘤学 | 405篇 |
出版年
2023年 | 23篇 |
2022年 | 26篇 |
2021年 | 66篇 |
2020年 | 40篇 |
2019年 | 72篇 |
2018年 | 67篇 |
2017年 | 54篇 |
2016年 | 60篇 |
2015年 | 67篇 |
2014年 | 96篇 |
2013年 | 121篇 |
2012年 | 166篇 |
2011年 | 188篇 |
2010年 | 96篇 |
2009年 | 96篇 |
2008年 | 224篇 |
2007年 | 207篇 |
2006年 | 230篇 |
2005年 | 291篇 |
2004年 | 281篇 |
2003年 | 290篇 |
2002年 | 275篇 |
2001年 | 49篇 |
2000年 | 30篇 |
1999年 | 62篇 |
1998年 | 76篇 |
1997年 | 81篇 |
1996年 | 50篇 |
1995年 | 61篇 |
1994年 | 50篇 |
1993年 | 54篇 |
1992年 | 43篇 |
1991年 | 26篇 |
1990年 | 27篇 |
1989年 | 37篇 |
1988年 | 21篇 |
1987年 | 19篇 |
1986年 | 31篇 |
1985年 | 20篇 |
1984年 | 25篇 |
1983年 | 22篇 |
1982年 | 8篇 |
1981年 | 12篇 |
1980年 | 23篇 |
1979年 | 6篇 |
1978年 | 16篇 |
1977年 | 10篇 |
1976年 | 10篇 |
1975年 | 7篇 |
1969年 | 7篇 |
排序方式: 共有3984条查询结果,搜索用时 0 毫秒
11.
Hiroshi Shimada Masao Nanko Shoichi Fujii Hidenobu Masui Shinji Togo Hideyuki Ike Akira Nakano Shigeo Ohki 《Journal of Hepato-Biliary-Pancreatic Surgery》1995,2(2):116-121
Hepatic micrometastases of the parenchyma adjacent to a macroscopic lesion were detected in 17 of 31 resected liver metastases.
Fifty-nine micrometastatic lesions were detected in total; 26 lesions were situated in the portal vein (PV), 22 in the central
vein (CV), 5 in the bile duct (BD), and 6 in the sinusoid (SS). A histological study confirmed the direct invasion of the
macrometastatic cancer cells into the adjacent PV, CV, BD, and SS. According to the tumor doubling time, the mean diameter
of the macrometastases in 19 remnant livers was calculated to have been 0.57±0.87 cm at the time of the primary resection.
The calculated diameter of 3 of these 19 macrometastases was found to be less than 0.01 cm, the minimum implantable size,
indicating that the cancer recurrence in these specimens may have developed from macroscopic metastatic lesions as a satellite,
and not from the primary tumor. In 13 patients who received doses of 5250 mg or more of 5 fluorouracil (FU) via the hepatic
artery, the cumulative disease-free rate 2 years postoperatively was 100%; this value was 47.6% in 11 patients who received
less than 5250 mg of 5 FU via the hepatic artery, and 0% in 39 patients who received no chemotherapy (P<0.005). These results suggest that anatomical hepatic resection for satellite lesions, combined with prophylactic hepatic
arterial chemotherapy for micrometastases, decreases the recurrence rate of hepatic metastases in the remnant liver. 相似文献
12.
Kazunari Okada Yang Il Kim Kimihiro Nakashima Izuru Tada Takanori Yoshida Michio Kobayashi Shigeo Yokoyama 《Surgery today》1993,23(7):626-631
A case of small fibrolamellar hepatocellular carcinoma (HCC) coexistent with a HCC of common type is herein reported. A 56-year-old man was diagnosed as having multi-nodular type HCC with liver cirrhosis. The serum alpha-fetoprotein (AFP) level was slightly increased. The patient underwent a partial caudate lobectomy and lateral segmentectomy. Histologically, both resected tumors were small HCCs measuring less than 2 cm in diameter. One was a fibrolamellar type located in the caudate lobe, while the other was the common type in the lateral segment of the liver. Positive immunohistochemical staining for AFP was observed in the tumor cells of the HCC of common type but was not observed in the fibrolamellar HCC. We also reviewed previously reported cases of fibrolamellar HCC in Japan, and discussed the clinicopathologic implications of this disease. 相似文献
13.
Journal of Anesthesia - 相似文献
14.
The distinction between Burkitt lymphoma and diffuse large B-Cell lymphoma with c-myc rearrangement. 总被引:2,自引:0,他引:2
Naoya Nakamura Hirokazu Nakamine Jun-Ichi Tamaru Shigeo Nakamura Tadashi Yoshino Kouichi Ohshima Masafumi Abe 《Modern pathology》2002,15(7):771-776
To compare immunophenotypic and molecular features between Burkitt lymphoma (BL) and diffuse large B-cell lymphoma (DLBCL) with c-myc rearrangements (c-mycR DLBCL), we analyzed 18 cases of B-cell non-Hodgkin's lymphoma with c-mycR that were confirmed by chromosomal and/or Southern blotting analyses. The cases were histologically classified into 10 BLs and five DLBCLs. The remaining three cases could not be classified because of suboptimal quality of the surgical materials. BLs were from five adults and five children, whereas all DLBCLs were from adults. BLs were positive for CD20 (10/10 cases examined), CD10 (9/10), Bcl-2 (1/9), and Bcl-6 (10/10), whereas they were negative for CD3 (0/10) and EBV (0/8), by Epstein-Barr virus (EBV) EBER-1 RNA in situ hybridization. c-MycR DLBCLs were positive for CD20 (5/5), CD10 (2/5), Bcl-2 (3/4), and Bcl-6 (4/4), whereas none of them were positive for CD3 and EBV. A mean of MIB-1 index (MIB-1+ cells/neoplastic cells, %) of BLs (98.1%) was higher than that of c-mycR DLBCLs (66.3%; P <.0001). Somatic mutation of immunoglobulin heavy-chain gene variable region (VH gene) in BLs (four cases) ranged from 0.7 to 4.9% with an average value of 2.3%, whereas those in DLBCLs (three cases) from 8.2 to 32.0% with an average value of 17.0%. It is, therefore, concluded that a growth fraction of nearly 100%, as well as a monotonous proliferation of medium-sized cells and c-myc(R), should be of value in the diagnosis of BL, which is probably different from c-myc(R) DLBCL. In addition, CD10+, Bcl-2-, and low frequency of mutation of the VH gene could be helpful for the histologic distinction of BL from (c-mycR) DLBCL. 相似文献
15.
Balamuthia mandrillaris is a free-living ameba that causes granulomatous amebic encephalitis in both immunocompromised and immunocompetent individuals. Because of a lack of pathognomonic symptoms and the difficulty in recognizing amebas in biopsied tissues, most cases are not diagnosed or effectively treated, leading to a >95% mortality. We report here on five cases of balamuthiasis that were diagnosed by indirect immunofluorescence (IIF) staining of serum for anti-Balamuthia antibodies (titer > or = 1:128) and confirmed by IIF of unstained brain tissue sections and/or detection of amebas in hematoxylin-eosin-stained slides. Additionally, we have used the PCR for the detection of mitochondrial 16S rRNA gene DNA from the ameba in clinical specimens such as brain tissue and cerebrospinal fluid (CSF) from individuals with Balamuthia encephalitis. Balamuthia DNA was successfully detected by the PCR in clinical samples from all five individuals. It was detected in brain tissue from three cases, in CSF from three cases, and in one of two samples of lung tissue from two individuals, but not in two samples of kidney tissue tested. One sample of unfixed brain tissue was culture positive for Balamuthia. In order to test the sensitivity of the PCR for detection of Balamuthia DNA, CSF specimens from two individuals negative for amebic infection were spiked with Balamuthia amebas. We found that it was possible to detect Balamuthia DNA in the PCR mixtures containing mitochondrial DNA from 1 to as little as 0.2 ameba per reaction mixture. A single Balamuthia ameba contains multiple mitochondrial targets; thus, 0.2 ameba represents multiple targets for amplification and is not equivalent to 0.2 of an ameba as a target. 相似文献
16.
Kojima M Nakamura S Shimizu K Yamane Y Itoh H Masawa N 《APMIS : acta pathologica, microbiologica, et immunologica Scandinavica》2003,111(12):1133-1136
A completely infarcted lymph node is an unusual event. However, lymph node infarction should alert the pathologist to the considerable likelihood of malignant lymphoma. We report two unusual cases of acute myeloid leukemia presenting with granulocytic sarcoma at disease onset with a lymph node lesion exhibiting extensive lymph node infarction. The infarcted tissue contained numerous eosinophilic cell ghosts. There were some islands of degenerated, pyknotic medium-sized nuclei resembling lymphoblasts present in the necrotic area. By immunohistochemistry, these medium sized cells were CD3-, CD20-, CD34+, CD43+, CD45RO-, CD68-, CD79a- and myeloperoxidase+ in both cases. Differentiation of granulocytic sarcoma from malignant lymphomas is important for adequate therapy. The present cases indicate that granulocytic sarcoma should be added to the list of differential diagnoses for lymph node infarction. 相似文献
17.
18.
Shigeru Furuhata Toru Kameya Tomoko Tsuruta Heiji Naritaka Mitsuhiro Otani Shigeo Toya 《Endocrine pathology》1992,3(4):201-204
A 51 -year-old woman with mixed growth hormone (GH) cell-prolactin (PRL) cell pituitary adenoma is presented. She had clinical
signs due to hypersecretion of GH and PRL. Resected tissue was studied immunohistochemically and morphologically. The serial
sections revealed that GH and α-subunit were co-localized in most cells, while GH and PRL were localized in different cells. 相似文献
19.
Hiroto Yamashita Shiro Noguchi Iwao Nakayama Hiroshi Togon Akira Moriuchi Shigeo Yokoyama Yuichi Mochizuki Akito Noguchi 《Pathology international》1984,34(1):123-132
A case of nonfunctioning parathyroid carcinoma in a 69-year-old female has been studied by light and electron microscopy. The tumor, located on the left side of the anterior neck, was well encapsulated by connective tissue but showed invasion to the capsule and to the thyroid. The tumor cells exhibited a trabecular arrangement surrounded by capillary networks but focally showed several ductal structures. They were polygonal in shape, had a large nucleus showing frequent mitosis and poor cytoplasm containing glycogen. Some tumor cells had clear and abundant cytoplasm, and resembled water-clear cells of the parathyroid. Immunohistochemically, no thyroglobulin was demonstrated in the tumor tissue. Electronmicroscopically, the tumor cells with high N/C ratio contained poorly developed cell organelles and abundant glycogen particles. They were poor in secretory granules and had no conglomeration of lipid. Desmosomes and tonoflbrils were observed. The ratio of the reported number of nonfunctioning parathyroid carcinoma to that of functioning one in Japan was compared with that in western countries. No difference of the ratio was found between these two, when identical criteria were employed. 相似文献
20.
Kojima M Nakamura S Ban S Inagaki M Sugihara S Yoshida K Masawa N 《Pathology, research and practice》2002,198(10):685-688
We report a case of primary pulmonary low-grade marginal zone B-cell lymphoma of the mucosa-associated lymphoid tissue (MALT)-type with prominent sclerosis, which morphologically resembled pulmonary hyalinizing granuloma (PHG) or inflammatory pseudotumor (IPT) of the lung. The patient, a 66-year-old Japanese female with a history of Sj?gren's syndrome and primary biliary cirrhosis, presented with a lower left lobe mass 6.8 cm in diameter. Histologically, the lesion is characterized by dense bundles of collagen with scattered plasma cells, mature small lymphocytes, and histiocytes among the collagen bundles. Only the peripheral area of the nodule contained dense lymphoplasmacytoid and histiocytoid infiltrates. A few centrocyte-like cells were obscured by the numerous plasma cells and plasmacytoid cells. In addition, lymphoepithelial lesions and colonalized lymphoid follicles were identified by immunohistochemistry alone. Although PHG and IPT are unlikely to be confused with pulmonary MALT-type lymphomas, the present case suggests that MALT-type lymphoma should be added to the list of differential diagnoses for PHG and IPT. 相似文献