共查询到20条相似文献,搜索用时 0 毫秒
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V. de Giorgi I. Savarese S. Rossari A. Gori M. Grazzini E. Crocetti A. Longo T. Oranges D. Massi 《Journal of the European Academy of Dermatology and Venereology》2013,27(7):919-921
Background The differential diagnosis between Reed nevi and melanoma becomes more difficult if the lesion to analyse presents a small size, with a diameter of 6 mm or smaller. Many studies have reported various dermoscopic features of Reed nevi during their growth phases. In early stages of evolution, the lesions generally show a characteristic globular appearance typically found in childhood, followed by the so‐called starburst pattern. Objective The aim of the study was to identify the main dermoscopic features in small Reed nevi (<6 mm in size). Methods Using a computerized skin‐imaging database for melanoma prevention surgery at the Department of Dermatology of the University of Florence, 15 Reed nevi were selected among 103 small (<6 mm) melanocytic lesions consecutively excised. Images of small Reed nevi, independently blinded to histopathological diagnosis, were administered to a dermatologist expert in dermoscopy, who separately examined the clinical and the dermatoscopic images of small Reed nevi and evaluated their clinical and dermoscopic parameters. Results Analysis of the main dermoscopic patterns showed that 40% had a reticular pattern, 20% had a starburst pattern, 6.5% had a globular pattern, 6.5% had a homogeneous pattern and 27% had an atypical pattern. Conclusion We propose that small, early‐stage Reed nevus are not characterized by an evolution of growth patterns to a phenotype typical of larger lesions. We assume that the patterns are distributed in a linear manner between age groups, may all be present at the outset and thus are independent from the various stages of nevus development. 相似文献
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正掌黑癣(tinea nigra)是由威尼克何德霉引起的皮肤角质层的真菌感染,是一种浅表性暗色丝孢霉病。该病在我国报道比较少,临床诊疗过程中极易与色素痣、炎症后色素沉着、花斑糠疹、黑素瘤等混淆,导致误诊误治。为提高对掌黑癣的认识,现将我科初诊误诊为色素痣而行皮肤组织病理检查后明确诊断为掌黑癣1例,报道如下。临床资料患者,女,30岁,湖南人。因左手掌黑色斑疹半年于2016年5月31日就诊。患者半年前初发现左手掌邻近大鱼际处黄豆大黑斑,无自觉症状,未予诊治,黑斑逐渐缓慢扩大。患者平素体健,否认接触高盐化学物,无外伤史。 相似文献
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Lam J Dohil MA Eichenfield LF Cunningham BB 《Journal of the American Academy of Dermatology》2008,58(5):884-888
Nevus sebaceus syndrome (SNS) is a constellation of nevus sebaceus with extracutaneous findings, including the ophthalmologic nervous, and musculoskeletal systems. Didymosis aplasticosebacea is a recently described entity consisting of aplasia cutis congenita and nevus sebaceus, implying twin spotting (didymosis). We describe a neonate with a nevus sebaceus on the scalp and a limbal dermoid on her left eye. Contiguous with the nevus sebaceus was a giant congenital melanocytic nevus and numerous areas of membranous aplasia cutis congenita. We propose the acronym SCALP (nevus sebaceus, central nervous system malformations, aplasia cutis congenita, limbal dermoid, pigmented nevus) to summarize the unique features of this case and review the two similar cases in the literature. 相似文献
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T. Ohnishi H. Shiraishi S. Fukaya T. Tanaka S. Watanabe 《Clinical and experimental dermatology》2015,40(2):156-159
We report three cases of verruciform xanthoma (VX) in male patients aged 82, 88 and 39 years, respectively. The clinical appearance was of a mulberry‐like area consisting of small papillae, which is typical of and specific to VX, and the diagnosis were histologically confirmed in all cases. Dermoscopy revealed that each surface papilla contained linear or hairpin vessels, which were surrounded by a marginal whitish rim. These structures are thought to correspond to dilated vessels in dermal papillae and papillated acanthotic epidermis, respectively. Furthermore, observation under compression (similar to diascopy) revealed yellow dots and debris, reflecting lipid‐laden foam cells. In order to compare these findings with those of other disorders with similar findings, two patients with xanthogranuloma, six with sebaceous naevus, and three with senile sebaceous hyperplasia were examined. The dermoscopic findings in these patients were not similar to those of VX. Therefore, we believe that the above dermoscopic findings are specific to VX and could be helpful in diagnosis. 相似文献
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Gabbi TV Omar ED Criado PR Valente NY Martins JE 《Anais brasileiros de dermatologia》2010,85(5):681-683
Meyerson nevi occur whenever a rare focal and transitory eczematous eruption arises around melanocytic lesions. The same phenomenon has also been observed in non-melanocytic lesions as well. Herein we report the case of a 25 year old, male patient, who had noticed, two months before, the arising of a pruriginous and erithematous halo around two nevi localized on his abdomen. The lesions were found to be atypical on dermoscopic examination and he was submitted to surgical excision of both nevi. Histopathological examination revealed displastic compound melanocytic nevi, surrounded by intraepidermical vesicles and spongiosis. Present report suggests that Meyerson phenomenon does not seem to alter dermoscopic features of nevi. 相似文献
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Cordero SC Royer MC Rush WL Hallman JR Lupton GP 《The American Journal of dermatopathology》2012,34(3):305-309
Apocrine nevus is a rare tumor composed of increased mature apocrine glands and ductal structures within a fibrous stroma, located predominantly in the reticular dermis. They have been reported in association with apocrine carcinoma, extramammary Paget disease, and syringocystadenoma papilliferum; less commonly a pure apocrine nevus is identified, unassociated with another apocrine proliferation. Clinically apocrine nevi may appear as solitary or multiple nodules or plaques on the scalp, presternal skin, though they are seen most commonly in the axillae. We describe 4 cases of pure apocrine nevus, all of which appeared clinically as painless or mildly tender skin-colored axillary masses, 2 of which were bilateral. In each case, the lesions appeared in adulthood, and patients denied knowledge of congenital or childhood presence. Patients denied pruritis, discharge, bleeding, or antecedent trauma. Grossly, the specimens consisted of subcutaneous, multicystic ill-defined nodules. Biopsy showed prominent apocrine glands composed of irregularly columnar luminal cells with eosinophilic cytoplasm arranged in a somewhat organoid pattern filling the reticular dermis and extending into the subcutaneous adipose tissue. The glandular luminal cells displayed decapitation secretion. There was a paucity of pilosebaceous units. In one case, the overlying epidermis was papillomatous. The deepest portion of one specimen had lactational change simulating a lactational adenoma. No atypia was seen in either the glandular structures or the stroma. The adjacent sebaceous and eccrine structures were normal. The histologic features and immunohistochemical profile in relation to other apocrine lesions will be reviewed. 相似文献
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Happle R 《European journal of dermatology : EJD》2007,17(2):133-136
Within the group of epidermal nevi, a so far nameless disorder is described under the term "linear Cowden nevus". This non-organoid epidermal nevus is caused by loss of heterozygosity, occurring at an early developmental stage in an embryo with a germline PTEN mutation, giving rise to Cowden disease. Hence, linear Cowden nevus can be categorized as a characteristic feature of type 2 segmental Cowden disease. Until now, several authors had mistaken this epidermal nevus as a manifestation of Proteus syndrome. The concept of linear Cowden nevus implies that Proteus syndrome is by no means caused by PTEN mutations. As a clinical difference, linear Cowden nevus is markedly papillomatous and thick, whereas linear Proteus nevus tends to be rather flat. Moreover, the spectrum of possibly associated cutaneous or extracutaneous anomalies differs in the two types of nevi. In conclusion, linear Cowden nevus, that may also be called "linear PTEN nevus", represents a distinct clinicogenetic entity. 相似文献
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《Anais brasileiros de dermatologia》2021,96(6):768-770
Eruptive disseminated Spitz nevi is a rare clinical presentation that features an abrupt widespread eruption of Spitz nevi. Spontaneous regression of these nevi has been rarely reported in previous literature. The authors of the present study report the case of a 30-year-old man who presented eruptive disseminated Spitz nevi that appeared within a week and started regression in the following years. 相似文献
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H Gartmann 《Zeitschrift für Hautkrankheiten》1981,56(13):862-876
The pigmented spindle cell tumour (PSCT) of Reed et al. is described by means of 28 own observations. The possibilities for histological definition and the differential diagnosis is other tumours are discussed. 相似文献