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1.
目的 分析儿童色素减退型线状苔藓皮肤反射式共聚焦显微镜(RCM)影像学特征.方法 RCM检查11例临床诊断为色素减退型线状苔藓的患儿皮损及皮损附近正常皮肤,再与该处皮损组织病理学检查进行对比.结果 色素减退型线状苔藓皮损组织病理学检查显示,表皮细胞间或细胞内轻度水肿,伴不同程度棘层增厚,基底细胞灶性液化变性,真皮浅层血管周围较多淋巴细胞及少数噬黑素细胞浸润.RCM水平扫描皮损显示,多灶性基底细胞液化变性,导致表真皮界面模糊,色素环不完整或不清晰,真皮乳头及真皮浅层较多高折光的噬黑素细胞及中、低折光的炎症细胞浸润.结论 RCM影像学特征可为儿童色素减退型线状苔藓的诊断及鉴别诊断提供有力依据.  相似文献   

2.
目的探讨结缔组织痣的皮肤镜和反射式共聚焦显微镜(RCM)特征。方法对1例结缔组织痣患者病程1年以内和1年以上的皮损分别进行皮肤镜和RCM观察,结合组织病理进行分析。结果结缔组织痣皮肤镜特征:1年以上的皮损中央呈灰白色斑疹,边界清晰,在灰白色斑疹区域可见白色网纹样结构、棕色小球、红斑、点状或逗状血管,有时可见毳毛及毛周围色素环,在白色斑疹周围环绕较均匀的棕褐色色素,皮损境界清晰;1年以内的皮损中央呈灰白色斑疹,边界清晰,在灰白色斑疹区域有少许散在棕褐色色素、毳毛及毛周围色素环。RCM特征:1年以内皮损,表皮大小形状不同的真皮乳头呈环形拥挤在一起,形成蜂窝状或鹅卵石样结构,其真皮乳头环密度和亮度明显增加,真皮胶原纤维束折射增强,可见胶原束与真皮乳头相连接,个别区域交织或呈漩涡状排列;1年以上皮损,由于表皮增厚,Z轴方向2—3mm深度处组织结构折射光减弱,胶原纤维束不明显,仅见少数淋巴细胞。结论结缔组织痣有独有的皮肤镜特征,并与组织病理和RCM图像有明确的对应关系。RCM对1年以内的早期皮损诊断有帮助。  相似文献   

3.
目的 利用反射式共聚焦显微镜(RCM)观察原发性皮肤淀粉样变的成像特征。方法 对2015年6月至2016年10月杭州市第三人民医院皮肤科门诊收集的30例临床确诊为原发性皮肤淀粉变患者的皮损进行RCM观察和组织病理检查,分析RCM特征。结果 原发性皮肤淀粉变皮损RCM检查显示,角化过度22例,棘层肥厚15例,基底层色素增加20例,真皮乳头及浅层色素失禁20例,30例真皮乳头增大出现多形性,且可见高折光的团块状物质。这些RCM主要特征与组织病理有较高的一致性。结论 原发性皮肤淀粉样变在RCM下的典型特征为真皮乳头内呈现折光度较高的团块状物质,RCM可作为原发性皮肤淀粉样变的无创性辅助诊断技术。  相似文献   

4.
目的 探讨原发性皮肤淀粉样变在反射式共聚焦扫描显微镜(RCM)下的主要敏感图像特征.方法 收集17例RCM下疑似原发性皮肤淀粉样变的病例,取该处皮损进行组织病理检查并结晶紫染色,记录并分析图像特征.结果 皮损处RCM主要敏感图像特征:角化过度,棘层轻度增厚,个别真皮乳头内见中低折光团块样物质,浅层血管周围可见嗜黑素细胞...  相似文献   

5.
目的探讨经典与色素性扁平苔藓在反射式共聚焦显微镜(RCM)及皮肤镜下的主要敏感图像特征。方法收集RCM及皮肤镜下疑似扁平苔藓的患者30例(经典扁平苔藓17例、色素性扁平苔藓13例),选定1处皮损行RCM及皮肤镜检查,然后对该皮损附近或对侧的正常皮肤行RCM及皮肤镜检查,最后取该处皮损进行组织病理检查,记录并分析图像特征。结果皮损处RCM主要敏感图像特征:真表皮交界处指环状结构破坏或部分破坏(基底细胞液化变性)、真皮乳头及其周围或真皮浅层较多大的类圆形或不规则形高折光噬色素细胞及小的圆形较高折光炎细胞浸润。皮损处皮肤镜主要敏感图像特征:经典扁平苔藓为白色网状条纹(Wickham纹);色素性扁平苔藓为蓝灰色色素颗粒、片状均质黄棕色色素。结论反射式共聚焦显微镜联合皮肤镜可作为经典与色素性扁平苔藓的无创诊断手段。  相似文献   

6.
目的 探讨皮肤镜在面部光线性角化病鉴别诊断中的应用价值.方法 从北京大学第三医院皮肤镜数据库选取经病理确诊的面部光线性角化病皮损作为病例组,同时选取临床曾疑诊光线性角化病,但病理证实为其他疾病的面部皮损作为对照组,比较两组间各皮肤镜特征的差异,以病理为金标准,用诊断试验方法评价皮肤镜诊断面部光线性角化病的价值.结果 病例组43个皮损,对照组22个皮损.病例组中基底假网状红斑(38/43,88.37%)、毛囊口周围白晕(39/43,90.70%)、毛囊口黄色角栓(41/43,95.35%)、表面黄白色鳞屑或角化物团块(42/43,97.67%)、玫瑰花瓣征(26/43,60.47%)、毛囊口周围粗大的不规则线状血管(19/43,44.19%)、毛囊口周围细小、线状-波浪状血管(29/43,67.44%)及周边色素加深(14/43,32.56%)的出现频率显著高于对照组(均P<0.05).在这8个皮肤镜特征中,毛囊口周围白晕、基底假网状红斑、毛囊口黄色角栓及玫瑰花瓣征单独诊断面部光线性角化病的约登指数最高,分别为0.54、0.52、0.50和0.38,表面黄白色鳞屑或角化物团块灵敏度最高(97.67%),周边色素加深特异度最高(95.45%).基底假网状红斑、毛囊口黄色角栓及毛囊口周围白晕3个特征联合诊断价值最高,其灵敏度、特异度、阳性预测值、阴性预测值分别为90.70%、81.82%、90.70%、81.82%,约登指数为0.73,与病理诊断的符合率为80.00%.结论 面部光线性角化病具有较特异的皮肤镜表现,基底假网状红斑、毛囊口周围白晕、毛囊口黄色角栓3个皮肤镜特征联合诊断价值最高.  相似文献   

7.
目的 采用皮肤镜和反射式共聚焦显微镜(RCM)观察扁平疣的图像特征.方法 临床未经治疗的扁平疣患者88例,每例选1处典型皮损先后行皮肤镜及RCM检查,记录并统计各项图像特征.结果 88例扁平疣患者皮肤镜检测显示,48例(54.55%)可见淡红色背景,40例(45.45%)可见淡黄色背景,84例(95.45%)可见散在数量不等的点状出血.RCM检测显示,48例(54.55%)可见类似洋葱皮样的同心圆结构.病程大于1年的57例患者中,44例(77.19%)可见类似洋葱皮样的同心圆结构;病程小于1年的31例患者中,仅有4例(12.90%)可见类似结构,两组检出率差异有统计学意义(x2=33.47,P<0.05).88例中,86例(97.73%)真表皮交界处可见基底层色素增加,真皮乳头环完整,真皮乳头内血管扩张充血,真皮乳头内可见1~2个增生的毛细血管管腔.8例患者治疗2周后皮肤镜及RCM下观察,上述特征明显消失.结论 结合临床表现,皮肤镜和RCM的图像特征可能为扁平疣的诊断提供帮助.  相似文献   

8.
目的 探讨瑞尔黑变病在反射式共聚焦扫描显微镜(RCM)和皮肤镜下的主要敏感图像特征.方法 招募7例经病理确诊为瑞尔黑变病的患者,所有患者均经RCM和皮肤镜成像,记录并分析图像特征.结果 皮损处RCM主要敏感图像特征:真表皮交界处模糊不清,基底细胞环不完整.真表皮交界处、真皮乳头处数量不等的形状不规则的高折光细胞,散在中...  相似文献   

9.
目的:评价皮肤镜诊断黑素细胞痣、脂溢性角化、日光性角化的准确度。方法:收集临床怀疑为黑素细胞痣、脂溢性角化和日光性角化的病例,由两位医生参照目前皮肤镜诊断标准对该三种皮肤肿瘤进行盲法独立诊断,并与组织病理结果相对照。结果:与组织病理诊断比较,(1)A、B两位医生使用皮肤镜诊断黑素细胞痣一致率(89.3%、91.2%)、灵敏度(94%、95.2%)、特异度(84.2%、86.8%)、误诊率(15.8%、13.2%)、漏诊率(6%、4.8%)。(2)A、B两位医生使用皮肤镜诊断脂溢性角化一致率(88%、91.7%)、灵敏度(91.7%、95.8%)、特异度(83.6%、86.9%)、误诊率(16.4%、13.5%)、漏诊率(8.3%、4.2%);(3)A、B两位医生使用皮肤镜诊断日光性角化一致率(84.1%、86.4%)、灵敏度(87.5%、87.5%)、特异度(17.9%、12.5%)、误诊率(82.1%、85.7%)、漏诊率(17.9%、14.3%)。结论:皮肤镜诊断黑素细胞痣、脂溢性角化和日光性角化的结果与病理诊断结果均有较好的一致性。  相似文献   

10.
目的探讨皮肤镜在基底细胞癌鉴别诊断中的应用价值。方法选取北京大学第一医院行皮肤镜检查并经病理确诊的基底细胞癌皮损为病例组,并随机选取色素程度和部位与基底细胞癌相似的其他色素性皮损作为对照组。以病理检查结果为金标准,用诊断试验方法评价皮肤镜诊断基底细胞癌的能力,计算提示黑素细胞性皮损的指征在基底细胞癌中的出现情况,并比较不同色素程度的基底细胞癌在皮肤镜下的差异。结果病例组86例,对照组68例。基底细胞癌皮肤镜经典诊断模式的灵敏度、特异度、阳性预测值、阴性预测值分别为98.84%、89.71%、92.39%、98.39%,Youden指数为0.88,与病理诊断的符合率94.81%。色素网、多发褐色至黑色小球或小点、毛囊口周围色素在黑素细胞性皮损中的比例显著高于基底细胞癌(P〈0.05),蓝白幕样结构见于61.63%的基底细胞癌。蓝黑色斑片和蓝白幕样结构在重色素组基底细胞癌中出现频率显著高于低色素组(P〈0.01)。结论皮肤镜诊断色素性基底细胞癌的经典模式在中国人群也显示出良好的诊断能力,研究提出的几个指征如周边色素栅状排列、周边色素加深、毛囊口周围色素加深或减退,在鉴别诊断中的价值尚需大样本研究证实。  相似文献   

11.
Histopathology is considered the ‘gold’ standard for the diagnosis and classification of melanocytic nevi, but the widespread use of in vivo diagnostic technologies such as dermoscopy and reflectance confocal microscopy (RCM), has enriched profoundly the knowledge regarding the morphological variability in nevi. This is because most morphological observations made via these in vivo tools are closely correlated with features seen in histopathology. Dermoscopy has allowed for a more detailed classification of nevi. As such, dermoscopy identifies four main morphologic groups (i.e. globular, reticular, starburst and structureless blue nevi), one group of nevi located at special body sites (i.e. face, acral, nail) and one group of nevi with special features. This latter category consists of nevi of the former categories, which are typified by peculiar clinical‐histopathological findings. They can be subdivided into ‘melanoma simulators’ including combined nevi, recurrent nevi and sclerosing nevus with pseudomelanomatous features, ‘targetoid’ nevi (i.e. halo, cockade, irritated targetoid haemosiderotic and eczematous nevus) and uncommon histopathological variants such as desmoplastic, white dysplastic or ballon cell nevus. While the dermoscopic and RCM patterns of the former categories have been studied in detail, little is currently known about the clinical morphology of the heterogeneous group of ‘special’ nevi. In this article, we describe the clinical, dermoscopic and RCM features of ‘special’ nevi and review the current literature on this group of melanocytic proliferations.  相似文献   

12.
OBJECTIVE: To determine diagnostic variables such as sensitivity and specificity of the major dermoscopic patterns observed in melanocytic lesions on acral volar skin, with particular attention to the significance of the parallel ridge pattern and irregular diffuse pigmentation in detecting acral melanoma. DESIGN: Multicenter, retrospective study. SETTING: University hospitals in Japan. PATIENTS: Patients with melanocytic lesions on acral volar skin. A total of 712 melanocytic lesions (103 malignant melanomas, including 36 in situ lesions, and 609 melanocytic nevi) were consecutively collected from the files of 3 hospitals. Diagnoses of all the lesions had been determined histopathologically. INTERVENTIONS: Dermoscopic examination. MAIN OUTCOME MEASURES: The sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of the major dermoscopic patterns seen in benign and malignant melanocytic lesions on acral volar skin. RESULTS: The parallel ridge pattern and irregular diffuse pigmentation showed extremely high specificity (99.0% and 96.6%, respectively) and very high negative predictive value (97.7% and 97.5%, respectively) in malignant melanoma. For melanoma in situ, the positive predictive value and diagnostic accuracy of the parallel ridge pattern were significantly higher than those of irregular diffuse pigmentation (P = .009 and P = .006, respectively). In melanocytic nevi, the specificity and positive predictive value of the parallel furrow pattern and/or the latticelike pattern were found to be very high (93.2% and 98.3%, respectively). CONCLUSIONS: Dermoscopy is immensely helpful in differentiating malignant melanomas from melanocytic nevi on acral volar skin. Moreover, the parallel ridge pattern aids in detecting acral melanomas in early, curable stages.  相似文献   

13.
目的:总结幼年黄色肉芽肿(JXG)在皮肤镜及反射式共聚焦显微镜(RCM)下特征,探讨皮肤镜、RCM及二者联合应用对JXG的诊断价值。方法:分析43例拟诊为JXG患儿皮损的皮肤镜及RCM镜下表现,由4名皮肤科医师采用五级法诊断,绘制受试者工作特征(ROC)曲线,行DeLong检验。结果:(1)皮损组织病理检查确诊40例为JXG,1例皮脂腺异位,1例spitz痣,1例肥大细胞瘤。(2)确诊患儿皮肤镜图像特征:15例皮损外观呈“落日征”,中央线状、分枝状血管;23例外观“落日征”,中央黄色小球云、棕褐色色素沉着、白色纤维条;2例呈“云状”棕黄色。(3)确诊患儿RCM图像特征:34例真皮层见大量形状不规则中等折光细胞,不等量环状靶形细胞;4例未见环状靶形细胞;2例角化过度,灶状角化不全,棘层以下显影不清。(4)RCM与皮肤镜单独诊断JXG的ROC曲线下面积比较,差异无统计学意义(P>0.05);单用皮肤镜、单用RCM分别与二者联合应用诊断JXG的ROC曲线下面积比较,差异均有统计学意义(P<0.05)。结论:皮肤镜及RCM可作为JXG早期筛查方法,二者联合比单独诊断更有价值。  相似文献   

14.
BACKGROUND: Clinical features of melanocytic naevi correlate poorly with the presence, histopathologically, of architectural disorder and cytological atypia, making the detection of histological atypia by means of macroscopic appearance unreliable. OBJECTIVES: The aim of this study was to investigate the diagnostic effectiveness of dermoscopy in the non-invasive detection of histological atypia in naevi. METHODS: Observers blinded for histological diagnosis classified a series of 168 melanocytic naevi as common or atypical on the basis of their clinical features and on their dermoscopic profile. The diagnostic performance of both methods compared with the true (histopathological) diagnosis was assessed. RESULTS: Dermoscopy using pattern analysis showed better results than clinical examination in the non-invasive detection of naevi with architectural disorder with or without cytological atypia (diagnostic accuracy 45% vs. 28%). A statistically significant difference in the frequency of dermoscopic parameters between atypical and common naevi was found for atypical pigment network (39% vs. 17%, P = 0.001) and dermoscopic regression structures (13% vs. 2%, P = 0.008). Dermoscopic features, which best predicted histological atypia in naevi, were regression structures (white scar-like areas or peppering), irregular vascular pattern and grey-blue areas (positive predictive values 83%, 83% and 73%, respectively). In contrast, no statistically significant difference in the mean values of the ABCD score between common and atypical naevi was found. The best diagnostic performance of dermoscopy by means of the ABCD rule (cut-off point of 4.0 of total dermoscopy score) was not dissimilar to that of clinical diagnosis (diagnostic accuracy 30%). CONCLUSIONS: Dermoscopy by means of pattern analysis enhances the diagnostic accuracy of dermatologists in the prediction of histological atypia in melanocytic naevi as compared with clinical examination alone.  相似文献   

15.
We recently described an in vivo reflectance confocal microscopy (RCM) method and our aim was to evaluate a possible additive value of this type of analysis in the management of melanocytic lesions. In two referral centers (Sydney and Modena), lesions (203 nevi and 123 melanomas (MMs) with a median Breslow thickness of 0.54 mm) were excised on the basis of clinical suspicion (history, dermoscopy examination, and/or digital monitoring). The RCM method was also trialed on a non-biopsied population of 100 lesions, which were clinically and dermoscopically diagnosed as benign nevi. All RCM and dermoscopy diagnoses were performed blinded to the histopathological diagnosis. Firstly, in the study population, a high interobserver agreement (on a subset of 90 lesions) was seen with the RCM method, which had superior specificity (68%, 95% confidence interval (95% CI): 61.1-74.3) for the diagnosis of MM compared with dermoscopy (32%, 95% CI: 25.9-38.7), while showing no difference in sensitivity (91%, 95% CI: 84.6-95.5, RCM; 88%, 95% CI: 80.7-92.6 dermoscopy). The two techniques had a weak correlation, resulting in only 2.4% of MMs being misclassified by both techniques. Diagnosis of light-colored lesions is improved by RCM (specificity 84%, 95% CI: 66.3-94.5) compared with dermoscopy (specificity 39%, 95% CI: 23.7-56.2). Secondly, the RCM method classified 100% of the non-biopsied control nevi population as benign.  相似文献   

16.
Digital dermoscopy (DD) follow up is a useful strategy for monitoring patients at high risk of melanoma. Reflectance confocal microscopy (RCM) is a valuable second‐level examination after dermoscopy for the evaluation of difficult to diagnose lesions. The aim of this study was to assess the value of RCM in routine DD monitoring of patients at high risk of melanoma. In this prospective study, performed over 22 months, changing melanocytic lesions were detected by DD and excised. RCM imaging was performed before surgical excision of all the lesions, and histopathology used as the gold standard diagnostic test. Eighty‐seven lesions, including 11 thin melanomas, were studied. Dermoscopic evaluation at follow up revealed a significant association between melanoma and asymmetry in two axes (P = 0.035). Enlargement and other changes in structure or color did not significantly differ between nevi and melanomas. Widespread pagetoid cells, non‐edged papillae, irregular and dishomogeneous junctional clusters, and sheet‐like structures were significantly associated with malignancy (P < 0.001). RCM allowed accurate diagnosis of melanoma in 10 of 11 cases (90.9%). The remaining case was classified as a dysplastic nevus. Forty‐six lesions (52.8%) in which RCM revealed no atypia were deemed unnecessarily removed. This study was limited by sample size. In conclusion, combined DD and RCM facilitates the recognition of thin malignant melanomas and reduces unnecessary excisions.  相似文献   

17.
In non-white populations, acral skin is the most prevalent site of malignant melanoma. Early melanomas of this anatomic site are often misdiagnosed as melanocytic nevi, which are not uncommon on acral skin. In fact, clinical and/or histopathological features of melanocytic nevi occasionally mimic those of early acral melanoma and vice versa, and thus differentiation of early acral melanoma from melanocytic nevus is sometimes very difficult for clinicians as well as for histopathologists. Our dermoscopic investigation has revealed that the parallel ridge pattern, a band-like pigmentation on the ridges of the skin markings, is highly specific to malignant melanoma in situ on acral volar skin. In the present study, we reviewed 22 acral melanocytic lesions that showed the parallel ridge pattern on dermoscopy but had very subtle clinical and/or histopathological presentations. We diagnosed 20 of them as early melanoma in situ by careful histopathological examination, which revealed histopathological features very similar to those seen in macular portions of overt acral melanoma, but fundamentally different from features found in melanocytic nevi on acral skin. In correspondence with their dermoscopic pattern, in these early lesions of acral melanomas, proliferation of solitary arranged melanocytes was mainly detected in the crista profunda intermedia, the epidermal rete ridge underlying the ridge of the skin marking. The two remaining lesions were diagnosed as possible cases of acquired melanocytic nevus because of the formation of well-demarcated nests of melanocytes in the epidermal rete ridges. We propose that a finding of preferential proliferation of solitary arranged melanocytes in the crista profunda intermedia is an important clue for the histopathological diagnosis of early phases of acral melanoma.  相似文献   

18.
The Spitz nevus is a benign melanocytic lesion with clinical and histopathological features similar to those of melanoma. It was first described in 1948 but great controversy still remains today with respect to its diagnosis and management. The use of dermoscopy may increase diagnostic accuracy. In Spitz nevus, the most common dermoscopic finding is a starburst-like pattern, followed by globular and atypical patterns. Diagnosis must be confirmed by histopathology, particularly in atypical cases.  相似文献   

19.
BACKGROUND: Dermoscopy is able to correctly classify a higher number of melanomas than naked-eye examination. Little is known however about factors which may influence the diagnostic performance during practice. The aim of the study was to analyze the effect of size of the lesion on diagnostic performance of dermoscopy in melanoma detection. METHODS: Eight dermatologists examined clinical and, separately, clinical and dermoscopic (combined examination) images of 200 melanocytic lesions previously excised [64 melanomas, 24 in situ and 40 invasive (median thickness 0.30 mm) and 136 melanocytic nevi]. After examination, diagnostic performance was analyzed in accordance with the major diameter of the lesions divided into 3 groups, i.e. small (less than 6 mm), intermediate (between 6 and 9 mm) and large (10 mm or more) lesions. These groups were shown to be highly comparable concerning the microstaging of melanomas (median thickness value 0.30, 0.22 and 0.32 mm, respectively). RESULTS: Dermoscopy increased the diagnostic performance of naked-eye examination of both intermediate and large lesions [sensitivity value: +19.3 (p = 0.002) and +10.3 (p = 0.007); diagnostic accuracy value: +7.4 (p = 0.004) and +6.1 (p = 0.07)]. On the contrary, no statistically significant increase was found dealing with small lesions (sensitivity +3.7, p = 0.66; diagnostic accuracy -1.7, p = 0.55). CONCLUSIONS: The diagnostic improvement associated with the addition of dermoscopy to naked-eye examination is influenced by the size of the lesion, i.e. it is lacking with lesions up to 6 mm in diameter. The optimized use of dermoscopy in melanoma detection is obtained dealing with melanocytic lesions 6 mm in diameter or larger.  相似文献   

20.
目的 探讨皮肤镜在男性生殖器部位尖锐湿疣诊断中的应用价值.方法 对66例男性生殖器部位临床疑似尖锐湿疣的122个疣体,由临床经验丰富的皮肤科医师根据皮损形态特征结合临床病史进行临床诊断,然后采用皮肤镜进行诊断,并与组织病理检查结果比较.结果 122个疑似疣体中,采用肉眼观察确诊100个为尖锐湿疣,皮肤镜检查确诊112个,病理检查确诊114个.以病理检查为金标准,皮肤镜检查的灵敏度是97.4%,特异度是87.5%;肉眼观察的灵敏度是87.7%,特异度是100%.在皮肤镜下男性生殖器部位尖锐湿疣颜色主要呈粉红色(98/114,86.0%),形态以乳头状多见(98/114,86.0%),有明显的血管特征(107/114,93.9%),其中多形血管(102/114,89.5%)和点状血管(98/114,86.0%)多见.结论 皮肤镜下尖锐湿疣疣体具有特征性结构,皮肤镜能够用于男性生殖器尖锐湿疣诊断.  相似文献   

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