首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到14条相似文献,搜索用时 140 毫秒
1.
目的 检测5-羟甲基胞嘧啶(5?hmc)在黑素瘤组织中的表达水平,分析5?hmc与黑素瘤侵袭、转移、预后的相关性。方法 采用免疫组化SP法检测5?hmc在67例黑素瘤、20例色素痣组织标本中的表达,采用Cox比例风险回归模型进行单因素和多因素回归分析5?hmc表达与黑素瘤患者预后的相关关系。结果 黑素瘤中5?hmc表达阳性率为40.30%(27/67),色素痣为75%(15/20),两组间差异有统计学意义(χ2 = 7.428,P = 0.006)。美国癌症联合会临床分期Ⅳ期黑素瘤中5?hmc表达水平明显低于Ⅱ、Ⅲ期黑素瘤(χ2 = 4.416,P = 0.036),淋巴结转移患者5?hmc表达水平明显低于无淋巴结转移患者(χ2 = 5.902,P = 0.015),且5?hmc表达水平随黑素瘤组织Clark分级升高而降低(χ2 = 4.828,P = 0.028)。5?hmc表达水平在不同年龄、性别、民族黑素瘤患者之间分布差异无统计学意义(P > 0.05)。Cox回归模型多因素分析显示,存在远处淋巴结转移(风险比:2.67,95% CI:1.22 ~ 5.84)、未手术切除(风险比:0.41,95% CI:0.18 ~ 0.95)、5?hmc低水平表达(风险比:3.54,95% CI:1.09 ~ 11.43)为预后不良的独立影响因素。结论 5?hmc可能参与黑素瘤侵袭转移,与黑素瘤预后相关。  相似文献   

2.
新疆80例恶性黑素瘤BRAF基因突变分析   总被引:2,自引:0,他引:2  
目的 探讨BRAF基因突变与恶性黑素瘤临床表现的关系。方法 PCR及DNA直接测序法对新疆80例恶性黑素瘤及30例正常皮肤石蜡包埋组织BRAF基因11、15外显子进行检测。结果 80例恶性黑素瘤19例发生BRAF基因突变,突变率为23.8%(19/80);有17例突变发生于15外显子,突变率为89.5% (17/19),其中V600E突变占BRAF基因15外显子突变的88.2% (15/17);2例突变位于11外显子,突变率10.5%(2/19);30例正常皮肤组织均未发现BRAF基因突变。患者平均发病年龄为57.5岁,年龄在60岁以下患者BRAF基因突变率显著高于60岁以上(χ2 = 6.613,P < 0.05)。黏膜、肢端、非肢端突变率分别为:18.2%(4/21),14.7%(5/34),41.7%(10/24),差异具有统计学意义(χ2 = 6.167,P < 0.05)。BRAF基因突变与恶性黑素瘤患者性别、民族、有无淋巴结转移无明显相关性(P > 0.05)。结论 BRAF基因仍为新疆地区恶性黑素瘤热点突变基因,且以该基因15外显子V600E突变为主。BRAF基因突变与恶性黑素瘤患者发病年龄、发病部位密切相关,而与民族、性别、有无淋巴结转移无相关性。  相似文献   

3.
目的 探讨活性诱导性胞嘧啶脱氨基酶(AID)与黑素瘤侵袭转移、预后的关系和临床意义。方法 免疫组化SP法检测AID蛋白在80例黑素瘤、23例色素痣石蜡包埋组织切片中的表达,结合临床病理生物特性进行分析。 结果 黑素瘤AID蛋白的阳性表达率53.75%(43/80),色素痣的表达率13.04%(3/23),差异有统计学意义(P < 0.05)。AID蛋白的表达与黑素瘤淋巴结转移、Clark分级、浸润深度及预后密切相关(P < 0.05),在年龄、性别、民族之间差异无统计学意义(均P > 0.05)。19例发生BRAF突变黑素瘤组织中,AID蛋白17例阳性表达,其中15例BRAFV600E突变的黑素瘤AID蛋白均阳性表达。 结论 AID蛋白可能诱导了黑素瘤BRAF突变,并参与黑素瘤的侵袭、转移,与预后相关。  相似文献   

4.
目的 探讨皮肤黑素瘤BRAF V600E突变蛋白表达情况,分析免疫组化法检测V600E突变的灵敏度和特异度。 方法 应用抗BRAF V600E单克隆抗体的免疫组化法检测103例皮肤黑素瘤、40例色素痣石蜡包埋组织切片中BRAF V600E突变蛋白表达水平。采用SPSS 17.0统计软件进行统计分析,率的比较采用χ2检验。 结果 BRAF V600E突变蛋白阳性表达率在皮肤黑素瘤中为20.4%(21/103),色素痣中为5.0%(2/40),两组差异有统计学意义(χ2 = 5.06,P < 0.05)。黑素瘤BRAF V600E突变蛋白的表达率在不同年龄组[< 60岁组表达率为29.8%(14/47), ≥ 60岁组为12.5%(7/56)]、不同民族[维吾尔族组为30.2%(13/43),汉族组为13.3%(8/60)]、不同发病部位[肢端为13.6%(6/42)、黏膜为11.8%(4/29)、非肢端为45.8%(11/32)]、不同Clark分级[Ⅰ ~ Ⅲ级组为8.6%(4/42),Ⅳ ~ Ⅴ级组为12.4%(17/61)]组间表达差异均有统计学意义(P < 0.05),而在不同性别、有无淋巴结转移组间表达差异均无统计学意义(P > 0.05)。免疫组化检测恶性黑素瘤中BRAF V600E突变灵敏度为100%(15/15),特异度为98.5%(65/66)。 结论 BRAF V600E突变蛋白在皮肤黑素瘤中高表达,在维吾尔族人群表达率高于汉族人群;免疫组化法检测BRAF V600E突变具有准确、快速等特点。  相似文献   

5.
目的 探讨影响恶性黑素瘤患者预后的相关因素。方法 回顾性分析433例恶性黑素瘤患者的临床和随访资料,选择13个对预后可能产生影响的因素进行Cox回归分析。生存分析采用寿命表法,多因素分析采用Cox模型,计算患者的预后指数(PI),将患者分组,计算不同组患者的期望生存曲线。结果 影响恶性黑素瘤患者长期生存的因素分别为肿瘤分期(RR = 1.56,P = 0.00)、性别(RR = 0.69,P = 0.01)、部位(RR = 1.06,P = 0.01)、肿瘤厚度(RR = 1.13,P = 0.04)及手术切除范围(RR = 0.72,P = 0.00)。根据预后指数的中位数将患者分为高危组和低危组,两组患者的中位生存时间分别是14.0个月、95.3个月,组间比较有统计学意义(P < 0.01)。结论 肿瘤分期、性别、部位、肿瘤厚度及手术切除范围是影响恶性黑素瘤患者生存期的因素,PI值可用于预测恶性黑素瘤患者的预后。  相似文献   

6.
目的:探讨皮肤黑素瘤(CMM)临床病理特点及与易感基因突变的关系。方法:回顾分析新疆维吾尔自治区人民医院2009年1月至2019年12月确诊的94例CMM临床及组织病理学特征。48例留存黑素瘤石蜡组织标本,采用Sanger测序法检测黑素瘤组织中BRAF、NRAS、c-KIT基因及人端粒酶逆转录酶(hTERT)基因启动子...  相似文献   

7.
目的探讨皮肤黑素瘤的临床和病理特点。方法回顾分析1983-2010年本院病理诊断为皮肤黑素瘤患者的临床资料,重新阅片,再次进行确认诊断和病理分型,对病理诊断不明确者行免疫组化检查,并进行统计学分析。结果皮肤黑素瘤高峰发病年龄为51~60岁,肢端、非肢端部位黑素瘤各占70.00%和30.00%,肢端雀斑样黑素瘤最多,占67.14%,其次为恶性雀斑样痣型黑素瘤(11.43%)和浅表扩散型黑素瘤(10.00%),本研究中结节型仅有3例(4.29%),非暴露与暴露部位在原发损害、原位和侵袭的分布上差异有统计学意义(P=0.045,0.013)。甲下黑素瘤手部明显多于足部(P=0.000)。结论国内黑素瘤发病可能有年轻化趋势;外伤在肢端部位黑素瘤发生中作用有待进一步证实;临床的ABCD标准敏感性较高,可推广使用和作为患者自检的方法。  相似文献   

8.
目的:分析Ⅰ期皮肤黑素瘤患者的临床特点、病理特征及预后情况。方法:收集西京皮肤医院2010年1月至2020年1月收治的163例Ⅰ期皮肤黑素瘤患者资料,回顾性分析临床特点、病理特征、治疗方法及预后。结果:163例Ⅰ期皮肤黑素瘤患者就诊中位年龄53岁,男56例(34.36%),女107例(65.64%)。原发皮损位于肢端1...  相似文献   

9.
目的 分析维吾尔族黏膜黑素瘤临床特点,检测c-kit基因突变,探讨与黏膜黑素瘤临床特征之间的关系。 方法 收集经病理确诊的31例维吾尔族黏膜黑素瘤患者的临床资料,采用PCR及DNA直接测序法进行c-kit基因突变检测。 结果 维吾尔族黏膜黑素瘤男女性别比为1 ∶ 1.2,平均年龄61.35岁。60 ~ 70岁为高发年龄段,51 ~ 59岁为次高发年龄段。头颈部为最常见的发病部位,其中以鼻腔黏膜居多;其次为泌尿生殖道和直肠黏膜。31例黏膜黑素瘤有4例发生c-kit基因突变(12.9%,4/31),突变均位于11外显子,以L576P突变为主。4例突变中,3例发生于直肠黏膜,1例发生于尿道黏膜。直肠黏膜与其他黏膜部位c-kit基因突变率分别为3/7、4.17%(1/24)。发生淋巴结转移患者c-kit基因突变率高于无淋巴结转移者(P = 0.043)。c-kit基因突变与性别、年龄无相关性(P > 0.05)。 结论 维吾尔族黏膜黑素瘤好发于老年人,发病部位以头颈部黏膜为主。c-kit基因突变与黏膜黑素瘤发生部位、有无淋巴结转移密切相关。  相似文献   

10.
目的 分析皮肤恶性肢端黑素瘤患者中c-kit基因突变的频率与类型及表达情况.方法 应用PCR、基因测序、免疫组化染色等方法检测115例皮肤恶性黑素瘤(CMM)患者、30例肢端黑素细胞痣患者及15例健康人皮肤组织标本中c-kit基因序列及c-kit蛋白表达情况.采用x2检验、Mann-WhitneyU检验、Spearman相关检验等统计学方法分析数据.结果 93例肢端CMM中84例(90.3%)表达c-kit蛋白,22例非肢端CMM中18例(81.8%)表达.58例肢端侵袭性CMM中,29例真表皮交界处肿瘤细胞c-kit蛋白表达强阳性,而8例真皮内呈侵袭浸润性生长的肿瘤细胞则不表达或弱表达c-kit蛋白;健康人皮肤组织中c-kit蛋白表达较弱;在30例肢端黑素细胞痣中19例(63.3%)阳性表达.c-kit蛋白在93例肢端CMM组的阳性表达率(90.3%)显著高于肢端黑素细胞痣组(63.3%),两组差异有统计学意义(x2=12.14,P< 0.05);71例侵袭性CMM中,c-kit蛋白在58例肢端CMM中阳性表达55例(94.8%),在13例非肢端CMM中阳性表达11例,在肢端CMM的表达高于非肢端CMM,两组差异有统计学意义(x2=4.18,P< 0.05).在原位、侵袭性、转移性肢端CMM组织中,c-kit蛋白表达水平与肿瘤的临床病理特征均未见明显相关(均P>0.05).115例CMM中检测到4例患者存在c-kit基因点突变,其中3例为L576P突变,1例为K642E突变,且均为肢端CMM,免疫组化显示弥漫性c-kit蛋白强阳性表达.结论 在侵袭性CMM中,c-kit蛋白在肢端CMM中的表达高于非肢端CMM.肢端CMM中检测到c-kit基因点突变,均为肢端型较常见的突变类型,但突变率较国外文献低.  相似文献   

11.
目的 探讨缺氧诱导因子(HIF)1α在肢端恶性黑素瘤(MM)中的表达及其与干细胞因子(SCF)/c-kit途径的关系。 方法 应用免疫组化法检测HIF-1α在93例MM、21例非肢端MM、39例肢端色素痣组织中的表达,并用15例肢端正常皮肤组织作对照。同时检测c-kit在93例肢端MM组织中的表达情况,采用Spearman相关分析,分析其与HIF-1α的相关性。 结果 在93例肢端MM中,81例(87.10%)阳性表达HIF-1α,在21例非肢端MM中19例(90.48%)阳性,39例肢端色素痣中6例(15.38%)阳性;15例肢端正常皮肤均为阴性。与肢端正常皮肤和肢端色素痣相比较,肢端MM中HIF-1α的表达增高,差异有统计学意义(均P < 0.01);在肢端MM和非肢端MM组间,HIF-1α表达差异有统计学意义(P < 0.01)。HIF-1α表达水平与黑素瘤Clark分级、Breslow厚度分级均呈正相关(rs = 0.442,P < 0.01;rs = 0.368,P < 0.01)。在原位、侵袭性、转移性肢端MM组织中,HIF-1α表达水平与肿瘤进展呈正相关(rs = 0.420,P < 0.01)。在肢端MM中,HIF-1α表达与c-kit表达呈正相关(rs = 0.307,P < 0.01)。 结论 HIF-1α蛋白在肢端MM中呈高表达,且与肿瘤的分期、进展、侵袭性均呈正相关,与c-kit在肢端MM组织中的协同表达,提示可能共同参与肢端MM的发病机制。  相似文献   

12.
One of the most attractive clinical targets for melanoma is the mitogen-activated protein kinase (MAPK) signaling pathway. In this study, we examined MAPK signaling activation in a total of 28 acral melanoma samples, consisting of 13 primary tumors and 15 metastases. In line with the previous reports, NRAS/BRAF mutations were rare; only one metastatic tumor had an NRAS E61R mutation, and one primary tumor and two metastases harbored BRAF V599E mutations. Western blot analyses, however, revealed phosphorylated extracellular signal-regulated kinase (ERK)1/2 proteins in 11 of 14 (78.5%) of the acral melanoma tumors. Furthermore, fluorescence in situ hybridization analyses revealed the prominent amplification of the cyclin D1 (CCND1) gene, which is an important down-stream effecter of the MAPK pathway, in 5 of 21 (23.8%) tumors examined. Interestingly, two of three tumors that were negative for phosphorylated ERK proteins according to western blot harbored CCND1 amplifications, suggesting that the increased gene dosage of CCND1 may exert effects similar to phosphorylated ERK proteins in cell growth. We conclude that, despite the low frequency of BRAF/NRAS mutations, the MAPK signaling pathway is constitutively activated in the majority of acral melanomas. This provides a rational basis to include acral melanomas into the clinical trials with MAPK inhibitors.  相似文献   

13.
Acral skin is the most prevalent site of malignant melanoma in non-Caucasian populations. On acral skin, other various kinds of pigmented lesions are also detected. Particularly, melanocytic nevus is commonly seen on acral volar skin; approximately 10% of Japanese have a nevus on their soles. Prognosis of acral melanoma is still generally poor because of delayed detection in the advanced stages. To improve the prognosis, early detection is essential. Early acral melanoma is seen as a brownish macule, which is clinically quite similar to acral nevus. Therefore, clinicians often face a dilemma when they see a pigmented macule on acral volar skin. Introduction of dermoscopy was a great epoch in this field. Pigmentation pattern on dermoscopy is completely opposite between early acral melanoma and acral nevus; pigmentation on the ridges of the surface skin markings is detected in early acral melanoma, whereas pigmentation along the furrows of the skin markings is seen in acral nevus. We termed these dermoscopic patterns the parallel ridge pattern and the parallel furrow pattern, respectively. These features are highly helpful in the differentiation between the two biologically distinct entities. The sensitivity and specificity of the parallel ridge pattern in diagnosing early acral melanoma is 86% and 99%, respectively. However, we must be aware that dermoscopic features in acral nevus sometimes mimic the parallel ridge pattern and that other conditions also could show dermoscopic features similar to the parallel ridge pattern. In this review article, we summarize key points of the dermoscopic diagnosis of early acral melanoma and then describe the three-step algorithm for the management of acral melanocytic lesions, which surely aids us in effectively detecting early acral melanoma and in reducing unnecessary resection of benign nevus.  相似文献   

14.
BRAF point mutations in primary melanoma show different prevalences by subtype   总被引:17,自引:0,他引:17  
To elucidate the biological significance of activating mutations of BRAF in human malignant tumors, we performed a mutation analysis using 43 cell lines established from tumors that had developed in several kinds of human organs. Because the same V599E point mutation was observed in three of six melanoma cell lines and no such mutations were observed in other types of cancers, we focused further on melanoma, performed mutation analyses of NRAS, KRAS, CTNNB1, and p16/p14(ARF) in these cell lines, and found one NRAS mutation and three p16/p14(ARF) mutations. We further searched for mutations of BRAF and NRAS in 35 primary sporadic melanomas from 35 Japanese patients and detected the V599E BRAF point mutation in only nine (26%) of them. Significant differences in mutation frequency were observed among four histological subtypes; four (50%) of eight superficially spreading melanoma and five (33%) of 15 acral lentiginous melanoma had the mutation, whereas none of 12 other types (six nodular melanoma, five lentigo melanoma, and one mucosal melanoma) had it. The BRAF mutation was observed frequently even in small lesions, indicating that activation of this gene may be one of the early events in the pathogenesis of some melanomas.  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