71例基底细胞癌皮肤镜下特征分析

目的：明确基底细胞癌在皮肤镜下的特征,为临床皮肤镜鉴别色素性皮损提供参考。方法：分析71例（71 lesions)经组织病理确诊为基底细胞癌的皮损皮肤镜图像。结果：最主要的皮肤镜指征按出现频率由高到低分别为：蓝灰色卵圆形巢（78.9%）、血管模式（74.6%）、多发性蓝灰色小球（60.6%）、溃疡（57.7%）、叶状结构（21.1%）。单纯临床诊断符合率为55%,加用皮肤镜后临床准断符合率为95%,提高了40%。结论：皮肤镜可提高临床诊断基底细胞癌的符合率。     

Dermoscopic features of small size pigmented basal cell carcinomas

Dermoscopic images of histologically proven pigmented basal cell carcinomas (BCC) were retrospectively assessed to compare the dermoscopic features of BCC of 3 mm or less in diameter (n = 6) with BCC of 4–6 mm in diameter (n = 11). All lesions lacked the presence of a pigment network. BCC with a diameter of 3 mm or less had fewer positive dermoscopic features compared with the 4–6 mm in diameter BCC. Multiple blue‐gray globules and large blue‐gray ovoid nests were frequently present. Dermoscopy is a useful tool for early diagnosis of pigmented BCC, even when they are small.     

Evaluation of dermoscopic and histopathologic features and their correlations in pigmented basal cell carcinomas

BACKGROUND: Because of their clinical similarities, pigmented basal cell carcinomas (BCCs) can be confused with melanocytic pigmented lesions especially with melanoma. Since special dermoscopic features have been described for pigmented BCCs, dermoscopy is accepted as a useful tool for the diagnosis of pigmented BCCs. OBJECTIVE: To investigate dermoscopic and corresponding histopathologic features of BCCs and to evaluate their correlations in pigmented BCCs. METHODS: In this study, 32 pigmented BCCs in 30 patients whose diagnoses were confirmed with clinical and histopathologic features were included. Before the histopathologic evaluation, the lesions were analysed for dermoscopic features. Histopathologic correlations of dermoscopic features of BCCs and the localization of pigment accumulation in tumour mass were investigated. RESULTS: In addition to ulceration, large grey-blue ovoid nests, multiple grey-blue globules, maple leaf areas and arborizing telangiectasia; dermoscopically yellow-brown, whitish-yellow, and black-dark brown colour showed statistically significant correlation with their histopathologic counterparts (P < 0.05). Whitish veil, which is among dermoscopic features of BCCs, did not show significant correlation with its histopathologic counterpart (P > 0.05). It was histopathologically determined that pigmentation is found within the tumour mass as well as in the tumour stroma and in the hyperplastic epidermal melanocytes. CONCLUSIONS: Ulceration, large grey-blue ovoid nests, multiple grey-blue globules, maple leaf-like areas and arborizing telangiectasia, which are specific dermoscopic features for the diagnosis of pigmented BCC, were found to correlate with their histopathologic counterparts. In conclusion, dermoscopy can be described as a valuable tool for the diagnosis of pigmented basal cell carcinomas.     

Long‐term therapy of multiple basal cell carcinomas: Clinicodermoscopic score for monitoring of intermittent vismodegib treatment

Vismodegib treatment of multiple basal cell carcinomas (BCCs) is limited by adverse effects and high relapse rates: intermittent regimens are therefore preferred for long‐term administration. The objective of this study was to investigate clinical and dermoscopic changes in BCCs during long‐term intermittent treatment and to identify those most indicative of tumor persistence/clearing. Clinical and dermoscopic images (n = 380 each) of 38 BCCs were acquired at 10 observation times (t0–t9). Biopsies were performed at baseline (t0) and after 72 weeks of treatment (t9). All images were evaluated retrospectively by experts who assessed the presence/absence of 12 clinical and 14 dermoscopic features: clinical scores (CScs) and dermoscopic scores (DScs) were then calculated.     

Usefulness of margin detection by digital dermoscopy in the traditional surgical excision of basal cell carcinomas of the head and neck including infiltrative/morpheaform type

Incomplete or suboptimal surgical excision of basal cell carcinoma of the head and neck is a relatively frequent occurrence. Methods of preoperative assessment of tumoral margins are therefore of paramount importance. The aim of this study was to compare the preoperative evaluation of margins with digital dermoscopy and clinical definition. One hundred and 12 patients with histologically confirmed basal cell carcinoma were selected for surgical excision. Subsequently, the margin of excision was determined by either clinical (45 patients) or dermoscopic evaluation (67 patients). After pre-surgical clinical evaluation, 22% of histological specimens of excised basal cell carcinoma showed suboptimal margins of excision. Pre-surgical dermoscopic evaluation had only 7% suboptimal excision. Preoperative digital dermoscopy is a better method to determine tumoral margins than clinical evaluation alone. Indeed, preoperative digital dermoscopy is an effective, simple, non-invasive procedure for the pre-surgical determination of margins.     

Automatic detection of basal cell carcinoma using telangiectasia analysis in dermoscopy skin lesion images

Background: Telangiectasia, dilated blood vessels near the surface of the skin of small, varying diameter, are critical dermoscopy structures used in the detection of basal cell carcinoma (BCC). Distinguishing these vessels from other telangiectasia, that are commonly found in sun‐damaged skin, is challenging. Methods: Image analysis techniques are investigated to find vessels structures in BCC automatically. The primary screen for vessels uses an optimized local color drop technique. A noise filter is developed to eliminate false‐positive structures, primarily bubbles, hair, and blotch and ulcer edges. From the telangiectasia mask containing candidate vessel‐like structures, shape, size and normalized count features are computed to facilitate the discrimination of benign skin lesions from BCCs with telangiectasia. Results: Experimental results yielded a diagnostic accuracy as high as 96.7% using a neural network classifier for a data set of 59 BCCs and 152 benign lesions for skin lesion discrimination based on features computed from the telangiectasia masks. Conclusion: In current clinical practice, it is possible to find smaller BCCs by dermoscopy than by clinical inspection. Although almost all of these small BCCs have telangiectasia, they can be short and thin. Normalization of lengths and areas helps to detect these smaller BCCs.     

Melanoma or pigmented basal cell carcinoma: a clinical-pathologic correlation with dermoscopy, in vivo confocal scanning laser microscopy, and routine histology

Background/purpose: New techniques are being explored for improving diagnostic accuracy of pigmented skin lesions. Confocal scanning laser microscopy (CSLM) may represent such a novel technique. The purpose of this report was to demonstrate the potential application of CSLM as an aid in the diagnosis of a pigmented skin lesion that is clinically suspicious for melanoma.
Methods: An irregular pigmented lesion was examined clinically and dermoscopically. The lesion was imaged by CSLM and subsequently excised for histologic examination. Findings from CSLM were correlated with features observed on the dermoscopic and histologic examination.
Results: Confocal scanning laser microscopy (CSLM) allowed for the non-invasive visualization of the histologic features of superficial pigmented BCC, including buds and "islands" of tumor cells at the dermoepidermal junction and melanin-laden macrophages. Conventional histology confirmed the diagnosis of pigmented BCC.
Conclusion: Confocal scanning laser microscopy (CSLM) may serve as an aid in the non-invasive diagnosis of pigmented skin lesions clinically suspicious for melanoma.     

多发性基底细胞癌3例

目的：探讨多发性基底细胞癌的临床特点及诊治方法。方法：报告3例多发性基底细胞癌的临床表现，组织病理，结合相关文献作回顾性分析。结果：3例患者中1例表现为面颈部胸背部多发的黑褐色丘疹8年，1例表现为左侧眶周溃疡，多发结节10年，1例表现为头部多发黑色斑块2年。皮损均经组织病理检查确诊为多发性基底细胞癌。结论：多发性基底细胞癌虽然少见，但不能忽视，建议手术切除皮损，并送组织病理检查，重视术后随访。     

Characteristics of multiple basal cell carcinomas: The first study on Japanese patients

Basal cell carcinoma (BCC), the most frequent skin cancer, has been increasing in incidence. However, the characteristics of multiple BCC have not been clarified in Japan. Therefore, we conducted a retrospective study to elucidate the features of multiple BCC compared with solitary BCC. The study population consisted of 327 patients with histopathologically proven BCC who were referred to the Department of Dermatology in Tottori University Hospital between November 2006 and April 2016. Of the 327 patients, 304 (93.0%) had solitary BCC and 23 (7.0%) had multiple BCC. The mean age of the patients with solitary BCC was 74.7 years (range, 31–102) and that of patients with multiple BCC was 79.3 years (range, 63–91). There was a significant difference in mean age between the two groups (P = 0.01). Approximately four‐fifths of the BCC were located on the head or neck in the total study population. In the group of patients with multiple BCC, the incidence of lesions on the head and neck was lower and that on the trunk was higher than those in patients with solitary BCC. There was a significant difference in the tumor site between the two groups (P < 0.0001). With respect to tumor histopathology, the ratio of superficial BCC was significantly higher in the group of patients with multiple BCC than in the group of patients with solitary BCC (P < 0.0001). In conclusion, we demonstrated that older age, truncal location and superficial histopathological type of tumor are features of multiple BCC in Japanese subjects.     

Dermoscopy‐guided surgery in basal cell carcinoma

Background In basal cell carcinoma (BCC), excision margins between 3 and 10 mm, according to site, size, borders, previous treatment and histology, can allow for radical excision in at least 95% of cases. Objective The objective was to ascertain whether dermoscopy can detect more accurately the lateral borders in BCCs than clinical examination alone, and allow us to obtain radical excision in more than 95% of cases with only 2‐mm excision margins. Methods A prospective study was performed of 200 consecutive BCCs of the head and neck removed with 2‐mm dermoscopically detected excision margins. Morpheaform BCC, deeply recurrent BCC, BCC in Gorlin‐Goltz syndrome, BCC located in sites not accessible through dermoscopy and superficial multifocal BCC were excluded. All cases of excised BCC were submitted to a uniform method of histological examination of the whole specimen with serial parallel sections at 2‐mm intervals. Results In only three cases did surgical excision with 2‐mm margins prove to be inadequate; in the remaining 197 cases, the excision margins were tumour‐free. The comparison of clinical and dermoscopic extension measurement showed concordance in 131 cases (65.5%). In 69 cases (34.5%), dermoscopic evaluation showed a larger peripheral extension. Conclusions These results indicate that 2‐mm dermoscopically detected excision margins can achieve histologically confirmed complete excisions in 98.5% of cases.     

痣样基底细胞癌综合征一例

痣样基底细胞癌综合征是一种罕见的常染色体显性遗传病,以泛发性皮肤基底细胞癌和多器官发育异常为主要临床特征。本文报告1例痣样基底细胞癌综合征患者,并结合相关文献对该病的发病率、发病机制、诊断标准、治疗方法等进行讨论。