我国东部地区结节性痒疹患者中医体质类型分布规律

目的探讨我国东部地区结节性痒疹患者中医体质类型的分布特点。方法采用病例对照设计方法,选取120例结节性痒疹患者作为病例组,120例健康体检者作为对照组,参照《中医体质分类与判定表》进行中医体质类型调查,分析其分布规律。结果结节性痒疹患者年龄(41.58±16.27)岁,性别男女比例约1∶1.2,体质类型分布前四位的是湿热质23例、血瘀质20例、气郁质19例、特禀质13例;健康体检者体质类型分布前四位的是平和质33例、气虚质19例、阳虚质14例、痰湿质13例;与对照组相比,病例组偏颇体质明显增多(P<0.01),2组体质构成比亦有显著性差异(P<0.01),其中湿热质、气郁质、血瘀质、特禀质较对照组转化分增加(P<0.05)。结论结节性痒疹的发病与湿热质、血瘀质、气郁质、特禀质偏颇体质类型密切相关。     

Pemphigoid Nodularis: A Case with 230 kDa Hemidesmosomes Antigen Associated with Bullous Pemphigoid Antigen

We report a 73-year-old woman with typical clinical, histological and immunofluorescence features of pemphigoid nodularis. Direct immunofluorescence studies of prurigo nodularis-like lesions and peribullous skin showed the linear deposition of IgG and C3 at the basement membrane zone. Circulating IgG against the basement membrane was also detected by indirect immunofluorescence. The serum from the patient was shown to contain the autoantibody against 230 kDa hemidesmosomal antigen associated with bullous pemphigoid antigen.     

Pseudoperforation: An uncommon histologic phenomenon in prurigo misleading for the diagnosis of reactive perforating collagenosis

Prurigo is a common skin condition characterized by vigorous scratching. Although ulceration is not uncommon in prurigo, a perforating-like lesion was not previously reported. In this study we described series of cases of prurigo with perforating-like lesions and discussed its relation to acquired perforating dermatoses. The study included 32 cases, during the period from 2008 to 2013. Clinical data and histological features were recorded and analyzed. The study included 78.1% males and 21.9% females with a mean age of 39.3 ± 5.61 years. History of insect bite was evident in 28.1%, hepatitis C virus infection in 46.9%, and diabetes mellitus in 9.4% of patients. Histologically, well developed lesions showed full thickness epidermal degeneration overlay by a cup-shaped crater. The contents of the crater included collagen and elastic fibers, bacterial colonies, inflammatory cells and necrotic keratin. The dermis showed non-altered collagen, increased vascularity and mixed inflammatory infiltrate. We believe that this pseudoperforation process is a secondary response to vigorous scratching in prurigo patients and not a primary mechanism as occurred in perforating dermatoses. The absence of altered collagen, the presence of full thickness epidermal necrosis and concomitant elimination of elastic fibers are significant histologic clues for differentiation between both conditions.     

六例结节性类天疱疮临床和实验室检查特点

目的 探讨6例结节性类天疱疮临床表现和实验室检查特征。方法 回顾性分析2016年1月至2019年8月北京协和医院皮肤科住院部6例结节性类天疱疮患者临床资料。结果 结节性类天疱疮主要发生于中老年人,平均发病年龄(58±16)岁。4例嗜酸性粒细胞升高,5例进行了免疫球蛋白E(IgE)检测,均升高,平均(530±672) KU/L。直接免疫荧光均提示基底膜带IgG和/或C3沉积,间接免疫荧光示抗基底膜带IgG抗体阳性,滴度1:40~1:320。5例患者抗BP180阳性[(24~85)U/ml,平均 (43±26) U/ml],未合并中枢神经系统疾病。6例患者中1例失访,5例可随访的患者中3例出现复发,2例仍口服激素维持治疗。结论 结节性类天疱疮发病年龄相对较轻,嗜酸性粒细胞和总IgE升高,抗BP180抗体滴度低,容易复发但合并神经系统疾病较少。     

Therapeutic Hotline: Treatment of prurigo nodularis and lichen simplex chronicus with gabapentin

Psychocutaneous conditions are frequently encountered in dermatology practice. Prurigo nodularis and lichen simplex chronicus are two frustrating conditions that are classified in this category. They are often refractory to classical treatment with topical corticosteroids and antihistamines. Severe, generalized exacerbations require systemic therapy. Phototherapy, erythromycine, retinoids, cyclosporine, azathiopurine, naltrexone, and psychopharmacologic agents (pimozide, selective serotonin reuptake inhibitor antidepressants) were tried with some success. Here five cases with lichen simplex chronicus and four cases with prurigo nodularis, who responded well to gabapentin, are presented.     

Epidermal Langerhans cells in actinic prurigo: a comparison between lesional and non-lesional skin

Background  Actinic Prurigo (AP) is a chronic pruritic dermatosis of unknown cause affecting sun exposed skin in defined ethnic groups with characteristic MHC alleles. However, the cutaneous dendritic cells have not been assessed.
Objective  To assess in situ the epidermal Langerhans Cell (LC) status in Actinic Prurigo.
Study design  Fresh skin samples from three AP patients were used to evaluate in situ the epidermal LC, comparing lesional and non-lesional sites in each subject.
Setting  AP patients attending the Dermatology Department at the Hospital M. Gea-Gonzalez in Mexico city.
Methods  Lesional and non-lesional skin samples were taken from each subject to prepare both epidermal sheets and conventional tissue sections. Three markers restricted to LC in epidermis (CD1a, ATPase, MHC-II) were used to quantify the LC per area in epidermal sheets.
Results  Compared to non-lesional skin from the same subject, a significant reduction in the number of LC per area of epidermis was found in lesional skin; with any of the three markers evaluated.
Conclusion  The frequency of epidermal LC decreases importantly in lesional skin from AP patients.     

Les photoallergies graves

Photosensitivity reactions group together reactions to sunlight, in which the pathophysiology involves the subject's immune system. Concerning exogenous photosensitivity reactions, the photosensitizing molecules responsible for their development have been definitively identified and the reactions are known to be a form of classical delayed hypersensitivity. Nevertheless, while the photosensitizing molecules in idiopathic light eruptions (e.g., polymorphic light eruptions and chronic actinic dermatitis) have not been identified, here, the mechanism is now most often considered to be a delayed hypersensitivity; they can also be IgE-dependent (e.g., solar urticaria). The diagnosis of photosensitivity reactions rests on the patient's history, the appearance of the lesions, their histology and the results of a photo-testing examination. During an exogenous photosensitivity reaction, its severity will depend on the intensity of the reaction, on its evolution to chronic actinic dermatitis or even more on the severity of the specific condition (e.g., polymorphous erythema and hypersensitivity syndrome). Solar urticaria is a serious condition because of its disabling character, the difficulty of treating it and, occasionally, by the existence of general signs or its association with systemic diseases. Hydroa vacciniform (vacciniform cold sores) and pruriginous lesions can lead to the development of particularly ugly scars. More disturbing, vacciniform cold sores can be associated with latent EBV infection and may be complicated by lymphoproliferative disorders involving natural killer cells or by haemolytic syndromes. Chronic actinic dermatitis is surely the most severe photosensitivity reaction because of the severity of the photosensitivity and the risk of its evolution to a lymphoproliferative disorder.