细胞凋亡在脂溢性角化病中的作用

应用免疫组化法，分别对脂溢性角化病、正常皮肤、基底细胞瘤做Fas，FasL，Caspase3染色，脂溢性角化病与正常皮肤三种抗体染色结果相似，基底细胞瘤Fas阳性，FasL和Caspase3全部阴性。     

巨大脂溢性角化病

报告1例巨大脂溢性角化病。患者女,59岁。因右臀部皮肤逐渐增大的褐色斑块30余年就诊。皮损约20 cm×15 cm,表面粗糙,无浸润。皮损组织病理检查示表皮角化过度伴角化不全,棘层肥厚,乳头瘤样增生,以基底样细胞为主,见假性角囊肿形成。诊断为脂溢性角化病。     

脂溢性角化病皮损Survivin表达的免疫组化观察

目的观察脂溢性角化症的各病理分型对Survivin染色的表达情况。方法脂溢性角化症患者63例,组织病理分型,免疫组化ABC法进行Sunrivin染色观察。结果脂溢性角化症的各病理分型染色结果显示①棘层肥厚型14/21例阳性,7/21例弱阳性;②角化过度型:16/20例染色阳性,4/20例显示较弱染色;③腺样型:9/13例染色阳性,4/13弱染色;④刺激型:1/9例弱染色,其余染色阴性。结论脂溢性角化病普遍表达Survivin,提示其发病可能与凋亡抑制相关。     

巨大脂溢性角化病1例

患者女,68岁,维吾尔族.因头部长肿物2年,于2010年3月10日就诊于我院.患者2年前右侧颞部头皮出现一黑褐色扁平斑块,渐增大,并突起,偶有瘙痒,无破溃及出血.     

P16、P21WAF1/CIP1、PCNA和cyclin E在脂溢性角化病中的表达及其意义

目的：研究脂溢性角化病皮损组织中P16、P21^WAF1/CIP1、PCNA、cyclinE四种细胞周期素相关因子的表达及意义。方法：应用免疫组化PV法（改进的SP法），对50例脂溢性角化病病人和10例正常人皮肤进行P16、P21^WAF1/CIP1、PCNA、cyclinE四种细胞周期素相关因子的测定。结果：脂溢性角化病患者中这四种因子的表达阳性率分别为：78％、68％、70％、46％；而正常对照组的阳性率仅为：40％、30％、50％、10％。结论：P16、P21^WAF1/CIP1、PCNA、cyclinE四种细胞周期素相关因子在脂溢性角化病的发病中可能起重要作用。     

Smad7在脂溢性角化病、日光性角化病及基底细胞癌中的表达

目的： 检测Smad7在脂溢性角化病、日光性角化病以及基底细胞癌中的表达。方法：对脂溢性角化病、日光性角化病及基底细胞癌标本（各30例）和30例正常标本进行免疫组化染色。结果：23例脂溢性角化病标本、23例日光性角化病标本和28例基底细胞癌标本中Smad7染色阳性,阳性细胞率分别为（31.0±23.0）%,（32.7±26.3）%和（62.6±32.1）%,均显著高于正常组织的（6.7±5.0%）。结论： Samd7可能与脂溢性角化病、日光性角化病以及基底细胞癌的发病有关。     

脂溢性角化病造模方法研究进展

脂溢性角化病是常见的皮肤良性肿瘤之一,病因及发病机制尚不清楚。为探索其发病机制及有效治疗药物,众多研究者建立了脂溢性角化病模型,如基因工程小鼠模型、紫外线诱导模型、异种移植模型、原代细胞模型等,现对近年来的模型作一综述。     

额部巨大脂溢性角化病

<正>患者,男,84岁。主诉:额部黑色肿物10余年。现病史:患者于10年前左右额部开始出现一黑色丘疹,随时间推移逐渐增大,隆起皮面,曾于当地医院就诊,具体不详,效果欠佳。自诉近半年内肿物增大明显,伴少许瘙痒,于当地医院诊断为恶性黑色素瘤?未行治疗,即于2017年4月6日来我院就诊,门诊以1.额部脂溢性角化;2.额部恶性黑素瘤待排查收入院。患者发病以来一般情况尚可,二便正常,体重无明显改变。家族史、既往史:家族中无类似病史。既往体健。     

脂溢性角化病的研究进展

脂溢性角化病是临床上常见的皮肤病,但是其病因不甚明了。近期的研究认为其发病与年龄、日光照射、细胞凋亡受阻等相关,因而新的治疗方法也应运而生。     

转化生长因子-α在脂溢性角化病皮损中的表达

目的　探讨转化生长因子 α(TGF α)与脂溢性角化病 (SK )发病的关系。方法　采用免疫组化法检测 3 0份SK皮损组织和 10份正常皮肤组织中TGF α的原位表达水平。结果　SK皮损组织中有TGF α的表达 ,其阳性表达程度与正常对照组比较差异有显著性。结论　SK皮损组织中TGF α异常高表达 ,提示TGF α可能参与了SK的增殖过程     

EGFR、PTEN、c-Jun和MMP-1在面部脂溢性角化病中的表达及意义

目的:检测皮肤光老化传导通路中的4个关键因子表皮生长因子受体(EGFR)、10号染色体同源丢失性磷酸酶-张力蛋白(PTEN)、转录因子活化蛋白-1(AP-1)的主要组分c-Jun、以及基质金属蛋白酶-1(MMP-1)蛋白在面部脂溢性角化病(SK)及面部正常皮肤组织中的表达,探讨SK的发病与皮肤光老化的相关性。方法:应用免疫组织化学染色及EVG染色技术检测54例面部SK患者皮损标本和20例面部正常者皮肤标本(对照组)中EGFR、PTEN、c-Jun和MMP-1的蛋白表达及弹力纤维的含量变化情况。结果:SK组中的EGFR、c-Jun和MMP-1表达均高于对照组(Z值分别为-4.45,-2.33,-2.37,P值均<0.05),PTEN的表达略低于对照组(Z=-1.55,P>0.05);Spearman等级相关分析表明SK皮损中EGFR、c-Jun与MMP-1表达呈正相关(r值分别为0.71、0.69,P值均<0.05),PTEN与MMP-1的表达呈负相关(r=-0.31,P<0.05);SK皮损下方真皮中弹力纤维变性情况较对照组明显,且皮损下方弹力变性组织堆积随年龄增长而增加(P<0.05),而胶原蛋白减少。结论:与皮肤老化有关的生物学指标EGFR、c-Jun、PTEN、MMP-1表达的变化及真皮中弹力纤维变性增加,提示皮肤光老化与SK的发生相关,面部SK可能是在光老化的基础上产生。     

脂溢性角化病128例临床病理分析

目的探讨脂溢性角化病的临床及组织病理学特点。方法对近10年来128例脂溢性角化病患者的临床及病理资料进行回顾性分析。结果六种类型脂溢性角化病的组织象均可见到,并以棘层肥厚型和角化过度型为主。51岁以上发病者占71.9%,头、面、颈等暴光部位发病者占53.9%,临床和病理诊断符合89例,临床误诊率30.47%。结论发病年龄虽有提前,但年龄的增加与脂溢性角化病的发病率仍成正比;暴露区域比非暴露区域更易患病,过度日光照射可能是其重要诱因;临床常易误诊,需与相关皮肤病鉴别。     

脂溢性角化病96例和日光性角化病28例临床与病理分析

目的观察脂溢性角化病(SK)与日光性角化病(AK)的临床及病理差异。方法回顾性分析本科门诊2006年1月-2011年7月经病理确诊的96例SK和28例AK患者的临床及病理资料,对数据用Excel整理与分析。结果①SK好发于中老年人,而AK好发于老年人;②SK皮损好发于头面、躯干及四肢,而AK好发于头、面和颈等光暴露部位;③组织病理:SK以角化型和棘层肥厚型为主,而AK以原位癌型和萎缩型为主;④SK临床与组织病理的诊断符合率为70.83%,而AK临床与组织病理的诊断符合率仅为46.43%,临床上易将AK误诊为SK。结论 AK发病晚于SK,临床上AK误诊率高于SK,两者鉴别诊断主要依赖组织病理。     

Clinical and Histopathological Investigation of Seborrheic Keratosis

BackgroundSeborrheic keratosis (SK) is one of the most common epidermal tumors of the skin. However, only a few large-scale clinicohistopathological investigations have been conducted on SK or on the possible correlation between histopathological SK subtype and location.ObjectiveThe aim of this study was to analyze the clinical and histopathological features of a relatively large number of cases of diagnosed SK.MethodsTwo hundred and seventy-one pathology slides of skin tissue from patients with clinically diagnosed SK and 206 cases of biopsy-proven SK were analyzed. The biopsy-proven cases of SK were assessed for histopathological subclassification. The demographic, clinical, and histopathological data of the patients were collected for analysis of associated factors.ResultsThe most frequent histopathological subtype was the acanthotic type, followed by mixed, hyperkeratotic, melanoacanthoma, clonal, irritated, and adenoid types; an unexpectedly high percentage (9.2%) of the melanoacanthoma variant was observed. The adenoid type was more common in sun-exposed sites than in sun-protected sites (p=0.028). Premalignant and malignant entities together represented almost one-quarter (24.2%) of the clinicopathological mismatch cases (i.e., mismatch between the clinical and histopathological diagnoses). Regarding the location of SK development, the frequency of mismatch for the sun-exposed areas was significantly higher than that for sun-protected areas (p=0.043).ConclusionThe adenoid type was more common in sun-exposed sites. Biopsy sampling should be performed for lesions situated in sun-exposed areas to exclude other premalignant or malignant diseases.     

Composite Tumor Associating Trichoblastoma and Seborrheic Keratosis

Seborrheic keratosis is a common benign epidermal tumor histologically composed of basaloid and squamous cells. It mainly occurs on the face, scalp, and trunk, and presents clinically as a well-circumscribed, brownish to black papule, nodule, or plaque. Trichoblastoma is a relatively rare benign, slow-growing tumor showing differentiation toward the primitive hair follicle. It clinically manifests as a solitary, skin to erythematous colored, well-circumscribed dermal nodule located predominantly on the head and neck with a predilection for the scalp. Histologically, a well-demarcated mass of follicular germinative cells that show various degrees of differentiation, arranged in lobules, sheets, and nests, is located in the dermis or subcutaneous fat layer. We report the case of a 28-year-old female patient with a solitary, 2.0×4.0-cm black plaque with a 0.7-cm skin-colored nodule on the scalp. Histologically, the entire black plaque had prominent hyperkeratosis, acanthosis, and papillomatosis with horn cysts. The central nodule showed well-circumscribed, various-sized dermal tumor lobules without a connection to the overlying epidermis. The lobular aggregation was composed of numerous basaloid epithelial nests and multiple primitive papillary structures with distinct peripheral palisading of nuclei. According to these findings, the scalp lesion was diagnosed as a composite tumor associating trichoblastoma and seborrheic keratosis.     

Two Cases of Basal Cell Carcinoma Arising in Seborrheic Keratosis

The present study reports two cases of basal cell carcinoma arising in seborrheic keratosis. The first case is a seventy-three-year-old female who presented with a blackish nodule arising from a pigmented lesion on her chest. Histopathological analysis of the nodule and the pigmented lesion revealed a basal cell carcinoma with hair follicular differentiation and an acanthotic seborrheic keratosis, respectively. The second case is a seventy-year-old female with a blackish nodule arising from a pigmented lesion on her back. Histological analysis of the nodule revealed an atypical basaloid cell mass surrounded by a seborrheic keratosis lesion. In addition to the coexisting seborrheic keratosis with the basal cell carcinoma, a basaloid follicular hamartoma that showed muliple hamartomatous hair follicles or small cysts replaced by a branching cord or lace-like network of basaloid cells surrounded by fibrovascular stroma was identified. We concluded that both cases presented a rare combination of a seborrheic keratosis which underwent a malignant change to basal cell carcinoma. It appears that both basal cell carcinomas and seborrheic keratosis may derive from a similar source: pluripotential cells of either the epidermis or hair follicle epithelium.     

鲍温病组织中PTEN和Survivin的检测

目的探讨抑癌蛋白PTEN和凋亡抑制因子Survivin在鲍温病发病中的作用。方法采用免疫组化SP法检测30例鲍温病组织和20例正常皮肤组织中PTEN和Survivin的表达。结果30例鲍温病组织中PTEN表达下调(P<0.001),Survivin的表达增高(P<0.001)。PTEN和Survivin的表达呈负相关(P<0.001)。结论PTEN异常低表达和Survivin异常高表达可能与鲍温病的发病有关。     

Fas FasL TRAIL分子在尖锐湿疣皮损中的分布

目的　探讨Fas、FasL和TRAIL介导的细胞凋亡在尖锐湿疣发病中的可能作用及意义。方法　用免疫组化方法检测了 30例尖锐湿疣患者皮损中Fas、FasL和TRAIL的表达。结果　所有尖锐湿疣标本 ( 10 0 % )Fas均阳性 ,2 3例 ( 76 .7% )FasL阳性 ,2 1例 ( 70 .0 % )TRAIL阳性 ,三者分布基本一致 ,正常表皮基本不表达。且FasL和TRAIL分子与真皮单一核细胞浸润呈显著负相关 (γ =-0 .5 0 6和γ =-0 .45 0 ,P均 <0 .0 5 )。结论　尖锐湿疣组织中细胞凋亡相关分子Fas、FasL和TRAIL表达异常 ,且Fas、TRAIL分子表达影响局部免疫反应 ,考虑凋亡失控可能参与尖锐湿疣发病 ,引起复发。