Clinical effects of 532 nm picosecond and nanosecond Nd∶YAG laser in treatment of early seborrheic keratosis / 中华医学美学美容杂志

Objective:To compare the efficacy and adverse reactions of picosecond and nanosecond Nd∶YAG laser 532 nm in the treatment of seborrheic keratosis.Methods:A total of 30 patients with seborrheic keratosis were enrolled in this study. The rash size was more than 1-2 cm. Half of them were treated with picosecond laser and the other half with nanosecond Q-switched Nd∶YAG laser by wavelength of 532 nm. The treatment effect and adverse reactions were evaluated by observing the area and the disappearance of pigment. The patients were followed up for 3 months after treatment.Results:The total effective rate was 73.33% in the experimental group and 53.33% in the control group, with no significant difference between the two groups ( P>0.05), but the pain score, satisfactory score, scab shedding time and the incidence of pigmentation in the experimental group were lower than those in the control group, and the differences were statistically significant ( P<0.05). Conclusions:The 532 nm picosecond laser has a higher efficiency in treating seborrheic keratosis than 532 nm Q-switched Nd∶YAG, but it has no statistical significance. However, the self satisfaction is higher than that of the control group; the pain score, scab shedding time and the incidence of pigmentation are lower than those of the control group, with statistical significance. Therefore, picosecond 532 nm laser treatment of early seborrheic keratosis is worthy of clinical promotion.

Dermoscopic features of solar lentigo, seborrheic keratosis and lichen planus-like keratosis: an expert consensus statement / 中华皮肤科杂志

Solar lentigo, seborrheic keratosis, and lichen planus-like keratosis are common benign epidermal proliferative diseases. To recognized their dermoscopic characteristics is helpful in many clinical aspects, such as making clear diagnoses, differentiating from other skin neoplasms, avoiding unnecessary biopsies or surgeries, and real-time monitoring of lesion changes. This consensus summarizes the dermoscopic characteristics of the 3 diseases. The dermoscopic features of solar lentigo include sharply demarcated borders, moth-eaten borders, faint pigment network, fingerprint-like areas, homogeneous brown pattern, pseudonetwork. The dermoscopic features of seborrheic keratosis are sharply demarcated borders, milia-like cysts, comedo-like openings, cerebriform pattern, hairpin blood vessels, moving en bloc in the wobble test. The dermoscopic features of lichen planus-like keratosis are pepper-like dots/granules, which may be surrounded by features of solar lentigo, seborrheic keratosis or actinic keratosis.

Collision tumor: pigmented Bowen's disease and seborrheic keratosis

Abstract: Bowen's disease is a type of squamous cell carcinoma in situ of the skin. The pigmented form is rare and represents less than 2% of cases. We report a case of a 74-year-old black man with a blackened and asymptomatic leg injury for about 6 months. Clinically, and under dermatoscopy, the injury was suggestive of melanoma or melanoacanthoma, and a definitive diagnosis was made by histopathological examination.

Ceratose seborreica em idosos de uma região de savana tropical / Seborrheic keratosis in elderly of a tropical savanna region / Queratosis seborreica em ancianos de una region de savana tropical

Objetivo: verificar a prevalência de ceratose seborreica em idosos residentes em região de savana tropical. Método: estudo descritivo transversal, realizado em Palmas, Tocantins, no primeiro semestre de 2016, com idosos de ambos os sexos. Resultados: participaram do estudo 259 idosos, sendo identificada prevalência de 8,5% de ceratose seborreica, com maior ocorrência no sexo masculino, na faixa etária de 70 a 79 anos, e que se auto declararam negros. Quanto às características da pele dos idosos com ceratose seborreica, a maioria apresentava pele ressecada e com diminuição do turgor cutâneo. Considerações finais: dados relacionados aos fatores ressecamento da pele e diminuição do turgor alertam para a necessidade de maior atenção e cuidados preventivos especificamente voltados a pessoa idosa. Esse estudo, representa o início para compreensão sobre a prevalência de ceratose seborréica em idosos em área de savana tropical, e destaca a importância de realização de outros estudos acerca dos fatores intervenientes, ampliando a compreensão sobre o fenômeno.

Objective: verify the prevalence of seborrheic keratosis in elderly residents of a tropical savanna region. Method: this is a descriptive cross-sectional study, carried out in Palmas, Tocantins, in the first half of 2016, with elderly men and women. Results: a total of 259 elderly people participated in the study, that identified a prevalence of 8.5% of seborrheic keratosis, with the highest occurrence in males, aged 70 to 79 years, and who declared themselves black. As to the skin characteristics of the elderly with seborrheic keratosis, the majority had dry skin and decreased skin turgor. Conclusion: the data related to skin dryness and turgor reduction factors point to the need for greater attention and preventive care specifically to the elderly. This study represents the beginning of an understanding about the prevalence of seborrheic keratosis in the elderly in a tropical savanna area, and highlights the importance of other studies about the intervening factors, increasing the understanding about the phenomena.

Objetivo: verificar la prevalencia de queratosis seborreica en ancianos residentes en la región de savana tropical. Método: estudio descriptivo transversal, realizado en Palmas, Tocantins, en el primer semestre de 2016, con ancianos de ambos sexos. Resultados: participaron del estudio 259 ancianos, fue identificada prevalencia de 8,5% de queratosis seborreica, con mayor ocurrencia en el sexo masculino, en el grupo etario de 70 a 79 años, y que se auto declararon negros. En cuanto a las características de la piel de los ancianos con queratosis seborreica, la mayoría presentaba piel reseca y con diminución do turgencia cutánea. Conclusión: datos relacionados a los factores de resecamiento de la piel y diminución de la turgencia alertan sobre la necesidad de mayor atención y cuidados preventivos específicamente orientados a la persona anciana. Ese estudio representa el inicio para la comprensión sobre la prevalencia de queratosis seborreica en ancianos en área de savana tropical, y destaca la importancia de la realización de otros estudios acerca de los factores intervinientes, ampliando la comprensión del fenómeno.

Aparecimento de sinal de Leser-Trélat após o tratamento de adenocarcinoma de cólon: um relato de caso / Leser-Trélat signal appearance after treatment of a adenocarcinoma of colon: a case report

Introdução: Edmund Leser (1827-1916) e Ulysse Trélat (1827-1900) descreveram a relação entre angiomas e neoplasias. Posteriormente, consagrou-se a relação entre ceratoses seborreicas e neoplasias com o epônimo de sinal de Leser-Trélat. Este trabalha objetiva apresentar um caso de paciente que desenvolveu sinal de Leser-Trélat após o tratamento da neoplasia. Relato: Paciente feminina de 39 anos, diagnosticada com adenocarcinoma moderadamente diferenciado de cólon, foi tratada com retossigmoidectomia com anastomose primária. Após a recuperação, a paciente apresentava lesões cutâneas arredondadas e ovalares, de coloração marrom e enegrecida, predominantemente em tórax. Inicialmente planas, se tornando elevadas e aumentando de tamanho, adquirindo aspecto verrucoso, típicas de ceratoses seborreicas. Discussão: No caso apresentado, o sinal de Leser-Trélat apareceu posteriormente ao tratamento da neoplasia. Entretanto, ele pode ser a primeira manifestação paraneoplásica, indicando a existência de um tumor, predominantemente de trato gastrointestinal, embora possam ocorrer em tumores uroteliais, mamários e pulmonares. As dermatoses associadas são a papilomatose cutânea florida, tilose palmoplantar, acantose nigricans. Assim sendo, sugere-se que o paciente com sinal de Leser-Trélat deva ser exaustivamente investigado à procura de neoplasia, bem como deve ser reinvestigado após um hiato de tempo, para o diagnóstico precoce e pronto tratamento.

Introduction: Edmund Leser (1827-1916) and Ulysse Trélat (1827-1900) described the association between angiomas and neoplasms. Subsequently, the relation between seborrheic keratoses and neoplasias with the eponym of Leser-Trélat signal was consecrated. This study aims to report a case of patient who developed Leser-Trélat signal after the treatment of the neoplasia. Report: A 39-year-old female patient, diagnosed with moderately differentiated colon adenocarcinoma, was treated with rectosigmoidectomy with primary anastomosis. After the recovery, the patient had diagnosed with rounded and oval skin lesions, of brown and blackish color, predominantly in the thorax. Initially flat, becoming elevated and increasing in size, acquiring a verrucous appearance, typical of seborrheic keratoses. Discussion: On this reported case, the Leser-Trélat sign appeared after the treatment of the neoplasia. However, it may be the first paraneoplastic manifestation, indicating the existence of a tumor, predominantly of the gastrointestinal tract, although they may occur in urothelial, mammary and pulmonary tumors. The associated dermatoses are cutaneous papillomatosis florida, palmoplantar tilose, acanthosis nigricans. Therefore, it is suggested that the patient with Leser-Trélat signal should be thoroughly investigated in search of neoplasia, as well as be reinvestigated after a time gap, for early diagnosis and prompt treatment.

Clinical efficacy of Q-switched laser on pigmented dermatoses and its detection of skin physiological function / 中华医学美学美容杂志

Objective To investigate the effect of Q laser on microcirculation structure and skin barrier function of subcutaneous tissue in patients with pigmented dermatosis.Methods The Q laser was used in treatment of 100 cases of pigmented skin diseases,and the skin barrier function was detected before and after treatment in patients with lesions,including sebum content,transepidermal water loss of skin moisture;difference of skin barrier function in patients was analyzed before and after treatment;the structural change of microcirculation were observed before and after treatment of skin tissue;the clinical curative effects of patients after treatment were analyzed,and then the patients were followed up to evaluate the recurrence rate.Results After the treatment of patients with skin lesions,barrier function was compared with a significant difference.Compared with before treatment,rise,oil content of skin lesions in patients with skin moisture content,transepidermal water loss of skin moisture of the patient improved obviously after treatment.The effective rate was 94 ％ in the 100 cases of skin diseases.No hypopigmentation or scar occurred in the patients.And the follow-up showed that the recurrence rate was relatively low.Conclusions Adjusted Q laser may participate in the improvement of microcirculatory disturbances through special mechanisms,so as to regulate the skin barrier function of patients.

High-frequency skin ultrasonographic and dermoscopic features of seborrheic keratosis / 中华皮肤科杂志

Objective To describe high-frequency skin ultrasonographic and dermoscopic features of seborrheic keratosis (SK).Methods Between August and December in 2017,46 outpatients with SK were enrolled from the Department of Dermatology of Peking Union Medical College Hospital,and 50 SK lesions were observed by 50-and 20-MHz high-frequency skin ultrasonography and dermoscopy.The highfrequency ultrasonographic and dermoscopic features of SK lesions were summarized and analyzed.Statistical analysis was done by using chi-square test for comparisons of evaluation results of SK lesions between 50-and 20-MHz ultrasonography,and the correspondence between high-frequency skin ultrasonographic and dermoscopic features of SK was analyzed by calculating the simple matching coefficient.Results As 50-and 20-MHz ultrasonography showed,ultrasonographic features of SK lesions from top to bottom were enhanced hyperecho (48/50 vs.39/50,respectively,P =0.007),enhanced hyperechoic masses or spots in the stratum corneum (22/50 vs.11/50,respectively,P =0.019),sound shadows behind the epidermis (34/50 vs.13/50,respectively,P ＜ 0.001),skin lesions with regular shapes and clear borders (46/50 vs.41/50,respectively,P =0.137),heterogeneous hypoechoic areas in the lesions (50/50 vs.47/50,respectively,P =0.079) and internal hyperechoic spots (25/50 vs.2/50,respectively,P ＜0.001),the lesional bottom being at the same level (40/50 vs.36/50,respectively,P =0.349),and reduced dermal echogenicity below the lesion (50/50 vs.28/50,respectively,P ＜ 0.001).In regard to the overall evaluation of the above 8 ultrasonographic characteristics,50-MHz ultrasonography was superior to 20-MHz ultrasonography (P =0.002).The common dermoscopic features of the 50 SK lesions were clear borders (n =50),comedo-like openings (n =45),ridge or cerebriform pattern (n =31),hairpin-like vessels (n =30),multiple milia-like cysts (n =24),moth-eaten border (n =21) and shiny white streaks (n =3).Under 50-and 20-MHz ultrasonography,the simple matching coefficients between enhanced hyperechoic masses or spots in the stratum corneum and comedo-like openings under dermoscopy were 42％ (21) and 20％ (10) respectively,and the simple matching coefficients between internal hyperechoic spots and multiple milialike cysts (＞ 3) under dermoscopy were 58％ (29) and 48％ (24) respectively.Conclusion Highfrequency skin ultrasonography and dermoscopy both are of great value to the assessment of SK lesions,and 50-MHz ultrasonography is superior to 20-MHz ultrasonography for imaging skin lesions.

Comparison of diagnostic performance of dermatologists versus deep convolutional neural network for dermoscopic images of pigmented nevus and seborrheic keratosis / 中华皮肤科杂志

Objective To compare the diagnostic accuracies of deep convolutional neural network (CNN) and dermatologists for pigmented nevus and seborrheic keratosis.Methods CNN network ResNet-50 was trained with 5 094 dermoscopic images of pigmented nevus and seborrheic keratosis using transfer learning,so as to establish a CNN two-classification model.Then,this model was applied to the automatic classification of 30 dermoscopic images of pigmented nevus and 30 dermoscopic images of seborrheic keratosis.Meanwhile,in combination with clinical photos of skin lesions,95 experienced dermatologists who had received dermoscopy training gave their diagnosis for the above 60 dermoscopic images.The diagnostic accuracies were compared between the two methods,and misclassified images were further analyzed.Results The CNN automatic classification model had the diagnostic accuracies of 100％ (30/30)and 76.67％ (23/30) for pigmented nevus and seborrheic keratosis respectively,and the total accuracy was 88.33％ (53/60).The average diagnostic accuracies of 95 dermatologists were 82.98％ (25.8/30) and 85.96％ (24.9/30) for pigmented nevus and seborrheic keratosis respectively,and the total accuracy was 84.47％ (50.7/60).There were no significant differences in the diagnostic accuracies for pigmented nevus or seborrheic keratosis between the CNN automatic classification model and 95 dermatologists (x2 =0.38,P ＞ 0.05).The dermoscopic images misclassified by CNN were divided into 3 categories:special-type lesions with high pigment content and marked keratosis,typical skin lesions with interference factors,and typical skin lesions without definite reasons for misclassification.Conclusions The performance of CNN automatic classification model is similar to that of experienced dermatologists in the two classification of pigmented nevus and seborrheic keratosis.The reasons for misclassification by CNN still need to be explored by dermatologists and professionals in artificial intelligence.

Expression and activity of cathepsin L2 and its effect on the degradation of melanosomes in skin lesions of seborrheic keratosis / 中华皮肤科杂志

Objective To determine the expression of cathepsin L2 (CTSL2)and evaluate its activity in skin lesions of seborrheic keratosis (SK),to observe the ultrastructural changes of melanosomes in the skin lesions of SK,and to estimate the effect of CTSL2 on the degradation of melanosomes.Methods Twenty patients with SK were enrolled from the Department of Dermatology,Renmin Hospital of Wuhan University.The lesional tissue and the perilesional normal skin were biopsied from each patient.Among 15 of the 20 patients,hematoxylin and eosin (HE)staining and Fontana-Masson silver staining were performed to observe the distribution of melanin granules,transmission electron microscopy (TEM)was conducted to observe the ultrastructural changes of melanosomes,and immunohistochemical staining was performed to estimate the cellular proliferative activity.RT-PCR and fluorogenic substrate cleavage assay were performed in the other 5 patients to determine the mRNA expression of CTSL2 and evaluate its activity,respectively.Sucrose density gradient ultracentrifugation was performed to isolate and purify melanosomes from the retinal pigment epithelium (RPE) harvested from a discarded eyeball of a 35-year old male patient with informed consent.The purified melanosomes were incubated with epidermal lysates of SK lesions,and TEM was used to observe the changes in the membrane structure of melanosomes.Statistical analysis was carried out by paired t test,and a P value ＜ 0.05 was considered statistically significant.Results A large number of melanin granules were deposited in SK lesions,while the linear deposition of melanin granules was only seen in the basal layer of the normal skin.TEM showed that the percentage of damaged melanosomes was much higher in the normal skin (49.00％ ± 4.00％) than in the SK lesions (24.33％ ± 3.06％)(t =8.49,P ＜ 0.05).RT-PCR revealed that the mRNA expression and activity of CTSL2 were both significantly lower in the SK lesions than in the normal skin (mRNA:0.35 ± 0.09 vs.0.43 ± 0.08,t =3.17,P ＜ 0.05;activity:17.46 ± 0.45 vs.28.78 ± 0.58,t =34.29,P ＜ 0.05).Moreover,TEM also showed that the percentage of damaged melanosome was lower in the SK lesion lysate-treated group (32.33％ ± 4.93％) than in the normal skin lysate-treated group (43.00％ ± 2.65％,t =3.30,P ＜ 0.05).Conclusion Decreased expression of CTSL2 in the SK lesions can affect the degradation of melanosomes by keratinocytes.However,whether CTSL2 directly takes part in the pathogenesis of SK or not is still needed to be further confirmed.

"String of pearls pattern": report of three cases of non clear-cell acanthoma

Abstract The coiled and dotted vessels in a serpiginous arrangement or "string of pearls" is considered a classical vascular pattern associated with clear cell acanthoma. We present three cases of epidermal tumors different from clear cell acanthoma that have the same "string of pearls" vascular pattern. Even though most authors keep considering the "string of pearls" vascular pattern an almost pathognomonic sign of clear-cell acanthoma, the cases presented here suggest that some other epidermal tumors can also show this pattern.

Dermatofibroma simulating seborrheic keratosis dermoscopically

Abstract: Dermatofibroma is a frequent benign tumor of easy clinical diagnosis in most cases, but that can mimic other dermatoses. Dermoscopy may help to define the diagnosis and its classical pattern is a central white area, similar to a scar, surrounded by a discrete pigment network. However, dermoscopic findings are not always typical. We describe here a case of dermatofibroma exhibiting ridges, furrows and pseudocomedos, a pattern which is typical of seborrheic keratosis, in dermoscopy.

Application of confocal laser scanning microscopy in the differentiation between seborrheic keratosis and Bowen′s disease / 中华皮肤科杂志

Objective To evaluate the application value of confocal laser scanning microscopy(CLSM)in the differentiation between seborrheic keratosis and Bowen′s disease. Methods CLSM was used to observe typical skin lesions in 88 patients clinically diagnosed with seborrheic keratosis and 18 patients clinically diagnosed with Bowen′s disease. Then, tissue specimens were resected from these lesions and subjected to histopathological examination. Results CLSM imaging of seborrheic keratosis lesions showed gyrus?like structures and keratin?filled inclusion cysts in the epidermis with trabecula?like extension of rete ridges in all the 88 cases, basal cells arranged in a cordike or radial pattern in 9 cases, and bright reflective structures in the basal layer and dermis in 6 cases. CLSM imaging of Bowen′s disease lesions revealed disorderly arrangement of large, irregularly shaped atypical cells in some areas in the middle and lower epidermis, and infiltration of scattered mononuclear cells in the superficial dermis. Conclusion CLSM images of seborrheic keratosis are different from those of Bowen′s disease, and CLSM may be helpful for their differential diagnosis.

Comedo-like openings in melanoma

We describe a case of melanoma with the presence of comedo-like openings at dermoscopy. These structures, typical of seborrheic keratosis, represent an uncommon finding in melanoma. We emphasize the importance of searching for specific dermoscopic criteria for melanocytic lesions during the examination of a pigmented lesion, despite possible observations of characteristic structures of non-melanocytic lesions, in order to increase the accuracy in the diagnosis of melanoma.

Dysplastic nevus associated with seborrheic keratosis

Seborrheic keratosis is a common skin lesion which may coincidentally be associated melanocytic nevi. The authors describe a case of dysplastic nevus associated with seborrheic keratosis and discuss the clinical, dermoscopic, and histological findings of this association. They also discuss the association between seborrheic keratosis and other benign and malignant tumours.

Oct-4 expression in epidermal tumors / 中国医师杂志

Objective The aim of this study was to understand the role of specific markers of stem cells Oct-4 expression in the development of human epidermal non-melanoma cutaneous tumors.Methods The paraffin-embedded samples were retrieved from files of pathology department at our hospital,including 20 cases of skin squamous cell carcinomas (SCC),20 cases of basal cell carcinomas (BCC),20 cases of seborrhoeic keratosis (SK) and 20 cases of normal skin (from head,face,trunk,extremities).The expression of Oct-4 and PCNA were observed by immunohistochemical staining technique.Results Oct-4 protein was abnormally increased in SCC and BCC comparel to normal skin and SK ( P ＜0.05 ).However there were no significant difference of Oct-4 protein expression between SCC and BCC ( P ＞0.05).There were also no significantly different Oct-4 protein expression between Sk and the normal skin ( P ＞ 0.05 ),and no significantly different Oct-4 protein expression between SK and BCC( P ＞0.05 ).PCNA protein was abnormally increased in SCC and BCC compared to normal skin and SK ( P ＜0.01 ).There were significantly different PCNA protein expression between SCC and BCC( P ＜0.05).There were also significantly different PCNA protein expression between SK and the normal skin ( P ＜ 0.05 ).However there were no significant difference of PCNA protein expression between SK and BCC ( P ＞ 0.05 ).There were positive correlation between the expression intensity of Oct-4 and PCNA in SCC and BCC.Conclusions The abnormal expression of Oct-4 may have an important role in the development of BCC and SCC.Positive Oct-4 expression cells may be the tumor stem cell in SCC and BCC.There were positive correlation between the expression intensity of Oct-4 and PCNA in SCC and BCC.The over expression Oct-4 in BCC and SCC may play an important role in proliferation of tumor.

Queratose seborreica simuladora de melanoma / seborrheic keratosis that resemble melanoma

Queratoses seborreicas são tumores epiteliais benignos de diagnóstico usualmente fácil pelo exame clínico e dermatoscópico. Em algumas situações podem simular lesões malignas, em especial o melanoma. O presente artigo tem como objetivo ilustrar dois desses casos e enfatizara observação dermatoscópica cuidadosa na busca de aspectos menos comuns dessas lesões que podem ser determinantes para o aumento da acurácia diagnóstica.

Dermatologia nas artes / Dermatology in the arts

A medicina tem sido representada, nas mais diversas expressões artísticas, desde as culturas primitivas até os dias atuais, com considerável grau de variedade e evolução, de acordo com áreas geográficas e heranças históricas, nas diferentes sociedades. Sempre houve preocupação com o registro da figura humana, seja no seu esplendor, seja no estado de morbidade. Os autores expõem registros de expressões dermatológicas nas pinturas europeias.

Medicine has been represented in the most diverse artistic expressions, from primitive cultures to present days, with a considerable degree of variety and evolution, according to the geographical areas and the historic heritage in different societies. There has always been concern regarding recording of the human figure, be it in its splendor, be it at morbidity condition. The authors present illnesses with dermatological expression in European paintings.

Expression of phosphatidylinositol-3-kinase in the lesions of psoriasis and some skin tumors / 中华皮肤科杂志

Objective To investigate the relationship of the expression of phosphatidylinositol-3-kinase(PI3K)subunits,P85 and P110 to the pathogenesis of psoriasis.Methods Immunohistochemical staining for P85 and P110 was performed in the tissue specimens from patients with psoriasis(n=30),chronic dermatitis(n=20),seborrheic keratosis(n=20),squamous cell carcinoma(n=20),basal cell carcinoma(n=30)and normal human controls(n=10).The absorbance of immunostained tissue was quantified with image analysis system (Q550CW,Leica,Manheim,Germany).Statistical analysis was carried out by ANOVA,Results Among these groups,a significant difference was observed in the expression level of P110 in the epidermis(F=35.64,P＜0.01),as well as in that of P85(F=59.98,P＜0.01)and P110(F=323.23,P＜0.01)in the lymphocytes infiltrating the lesion.Increased expression of P110 was found in the epidermis of psoriatic lesions compared with the lesions in the other disorders,whereas no significant difference was noticed among the other disorders.In the case of P85 and P110 expression in the lesion-infiltrating lymphocytes infiltrating the lesion,psoriasis and squamous cell carcinoma significantly differed from the other disorders,while no difference was observed between psoriasis and squamous cell carcinoma (P＞0.05).Conclusions The high expression of P110 might be closely correlated to the hyperproliferation of keratinocytes;but filrther study is needed to clarify the relationship of increased expression of P85 and P110 to the activation and proliferation of lymphocytes in psoriatic lesions.

Expression of ezrin in squamous cell eardnoma,basal cell carcinoma and seborrheic keratosis / 中华皮肤科杂志

Objective To investigate the expression of ezrin in seborrheie keratosis(SK),basal cell carcinoma (BCC).squamous cell carcinoma (SCC)and its relation to elinical pathology parameters.Methods Skin samples were collected from 36 patients with SCC,27 patients with BCC,20 patients with SK and 10 normal human controls.Immunohistochemistry was performed to detect the expression of ezrin in these samples.The relationship between ezrin expression and prognosis of SCC was assessed using COX regression analysis.Results The positivity rate of ezrin in SK,BCC and SCC samples was 25.0%,66.7%,91.3%,respectively,compared to 20.0%in normal controls.Compared with the controls,a significant increase was observed in the expression of ezrin in patients with BCC and SCC(both P＜0.05).but not in those with SK(P＞0.05).Moreover.increased expression level of ezrin was correlated with a high degree of tumor malignancy,advanced pathological stage,and occurrence of lymph node metastasis of SCC (r=0.87,0.80,0.89,respectively,all P＜0.01).COX regression analysis revealed that the expression level of ezrin was an independent factor for the prognosis of SCC.Conclusion The expression level of ezrin is closely related to the malignancy of skin tumors,pathological grading and lymph node metastasis of SCC.

Expression of aquaporin 3 in four cutaneous tumors / 中华皮肤科杂志

Objective To investigate the expression of aquaporin 3 (AQP3) in lesions of four cuta-neous tumors. Methods Immtmohistochemistry was utilized to measure the expression of AQP3 in tissue samples from 30 patients with seborrheic keratosis, 15 patients with Bowen's disease, 32 patients with squa-mous cell carcinoma, 17 patients with malignant melanoma and 15 normal human controls. Results AQP3 was observed in all the tissue samples from both patients and controls. A significant increment was noticed in the expression of AQP3 in patients with Bowen's disease, squamous cell carcinoma and malignant melanoma compared with the normal controls (all P < 0.01), while no significant difference was found between patients with seborrheic keratosis and the controls (P > 0.05). The highest expression of AQP3 was obtained in lesions from patients with squamous cell carcinoma and malignant melanoma, followed by those with Bowen's disease (both P < 0.01), and there was no significant difference between squamous cell carcinoma and malignant melanoma (P > 0.05). The differentiation status of squamous cell carcinoma significantly corre-lated with the expression of AQP3 (P < 0.01). AQP3 was significantly higher in malignant melanoma with metastasis than that in malignant melanoma without metastasis (P < 0.05). Conclusion The expression of AQP3 is upregulated in malignant skin tumors.