Update on lichen planus and its clinical variants

Hypertrophic lichen planus on lip mimicking SCC

The lichen planus (LP) is an inflammatory and immune-mediated disorder that can affect the hair, mucous membranes, nails, and skin. Lichen planus rarely affects the lips. In cases of lip involvement, it presents as radiated streaks, lace-like papules, and erosions. There is no report of lip LP presenting as hypertrophic plaque. Here, we report interesting and rare clinical presentations of LP in a 45-year-old male patient that presented with a verrucous hyperkeratotic plaque on the lower lip mimicking squamous cell carcinoma. However, oral examination revealed, reticulated white patches on the bilateral buccal mucosa, and a biopsy of the lip lesion revealed lichenoid dermatitis which led to the diagnosis of hypertrophic lichen planus. Familiarity with the different clinical presentations of LP and its variants is essential for prompt diagnosis and effective treatment.

Desquamative Gingivitis in the Context of Autoimmune Bullous Dermatoses and Lichen Planus-Challenges in the Diagnosis and Treatment

Desquamative gingivitis (DG) is a clinical term that describes erythema, desquamation and erosions of the gingiva, of various etiologies. Although the clinical aspect is not specific for a certain disease, an accurate diagnosis of the underlying disorder is necessary because the disease course, prognosis and treatment vary according to the cause. DG may inflict significant oral discomfort, which is why patients typically present to the dentist for a first consultation, rendering it important for these specialists to be informed about this condition. Our paper aims to review the ethiopatogenesis and diagnostic approach of DG, focusing on the most common underlying disorders (autoimmune bullous dermatoses and lichen planus) and on the management of these patients. Potential etiological agents leading to an inflammatory immune response in the oral mucosa and DG appearance include genetic predisposition, metabolic, neuropsychiatric, infectious factors, medication, dental materials, graft-versus-host reaction and autoimmunity. A thorough anamnesis, a careful clinical examination, paraclinical explorations including histopathological exam and direct immunofluorescence are necessary to formulate an appropriate diagnosis. Proper and prompt management of these patients lead to a better prognosis and improved quality of life, and must include management in the dental office with sanitizing the oral cavity, instructing the patient for rigorous oral hygiene, periodic follow-up for bacterial plaque detection and removal, as well as topical and systemic therapy depending on the underlying disorder, based on treatment algorithms. A multidisciplinary approach for the diagnosis and follow-up of DG in the context of pemphigus vulgaris, bullous pemphigoid, cicatricial pemhigoid or lichen planus is necessary, including consultations with dermatologists, oral medicine specialists and dentists.

A Rare Case Report: Five Variants of Lichen Planus in a Young Male Patient

Lichen planus is a common dermatological condition. It is described as a chronic inflammatory mucocutaneous disease that has characteristic clinical and histopathological findings. Classical lichen planus lesions occur as purple, pruritic polygonal papules or plaques with a lace-like pattern of whitish markings on the surface. Despite the large number of variants that exist with different clinical manifestations from the classic form, histopathology features are fairly similar among the subtypes and can aid in the diagnosis. Although most cases of lichen planus are often self-limiting with spontaneous resolution expected within one to two years, early diagnosis and treatment are encouraged to control severe pruritus and painful mucosal erosion, but most importantly to minimize the potential for malignant transformation in long-standing lesions. The main objective of this paper is to report the first case of five cutaneous variants of lichen planus occurring simultaneously in a young male patient. 

Nail lichen planus: A review of clinical presentation, diagnosis and therapy

Lichen planus is a multifaceted disease of complex etiopathogenesis. Nails are involved in up to 10% of patients with lichen planus. Although most cases are mild, serious consequences may occur due to rapid progression of the disease, the high risk of scarring, and the resulting irreversible damage to the nail structure. Permanent damage of at least one nail occurs in approximately 4-12% of patients with nail lichen planus. In this narrative review, we emphasize the pathophysiology of nail lichen planus, the emergent nature of the disease, and the spectrum of different clinical manifestations. Diagnosis of nail disease in general, and of nail lichen planus in particular, is rapidly evolving. This review provides a comprehensive account of the non-invasive and invasive diagnostic techniques and treatment options reported in the literature, with emphasis on the efficacy and safety of the drugs used, the associated evidence, and the factors to be taken into account in planning and providing adequate treatment. The role of aesthetic and camouflage options is also summarized.

Gold Dental Implant-Induced Oral Lichen Planus

Lichen planus is a chronic inflammatory cutaneous and mucosal disease mostly affecting middle-aged individuals. The etiology of lichen planus is unknown, but current literature suggests that it is an altered immune response characterized by dysregulated T-cell activation and subsequent inflammation which can be associated with conditions like allergic contact dermatitis and hepatitis C. Additionally, heavy metals like lead, tin, arsenic, and bismuth can create inflammatory and allergic reactions that can predispose to the formation of lichen planus. This report examines the case of a 64-year-old female with longstanding oral lichenoid lesions with superimposed Wickham's striae, allergic skin reactions to several medications, and a history of receiving gold-containing dental implants. As a result of her history and subsequent allergy testing, she was found to have a gold allergy. The constant mucosal irritation from her dental implants likely was associated with the development of her oral lesions, which were confirmed to be oral lichen planus. She was recommended to apply triamcinolone 0.1% ointment to her oral lesions and to follow up with her dentist for evaluation of her filings. Further, it was recommended she replaces the dental crowns with compounds lacking gold to decrease the persistent irritation. This case represents the first such instance of gold dental fillings directly having an appreciable role in the development of oral lichen planus. 

Seasonal and gender variation in skin disease: A cross-sectional study of 3120 patients at Razi hospital

Objective: We aimed to determine the prevalence of different skin diseases and their seasonal variations at the Razi dermatology hospital from 2019 to 2020.

Methods: In this cross-sectional study, we obtained data from the medical records of 3120 patients visiting the dermatology clinic of Razi hospital. The prevalence of skin diseases was evaluated using meteorologically defined seasons. We looked for significant equally distributed results during each season.

Results: During all seasons, women were referred to our clinic more frequently than men. Some diseases demonstrated significant seasonality with a peak during the winter, including acne, eczema, wart, seborrheic dermatitis, nevus, vitiligo, lentigo, and dermatophytosis. Atopic dermatitis was more frequent during the spring and winter compared with other seasons (p < .05). Actinic keratosis and lichen planus showed a significant seasonal trend with a peak during the summer (p < .05). Infections, including viral, bacterial, and fungal skin diseases, were more frequent during the winter than the summer (p = .001).

Conclusion: This study provides an overview of the seasonal distribution of dermatology visits at our referral hospital, which will aid in developing better policies to prevent and manage skin disorders in outpatient visits.

Lichen Planus Activity and Damage Index (LiPADI)–Creation of the Questionnaire

Introduction: Lichen planus (LP) is a chronic autoimmune disease that affects skin, oral and genital mucosa, and other sites. Basic difficulties in assessment of LP are multitude of disease forms and diverse locations of lesions. Moreover, there is lack of objective and consolidated tool for assessment of disease severity and LP progression. Objective: The aim of the study was to develop a valid evaluation tool of LP severity, which will enable disease assessment in a repetitive way. Materials and methods: A combined tool called Lichen Planus Activity and Damage Index (LiPADI) was developed to assess the severity of LP skin, mucosal, and nail lesions as well as hair loss/scaring alopecia to provide an integrative scoring for LP activity and damage caused by the disease. Skin lesions were assessed in nine locations: scalp, face, chest, abdomen, back and buttocks, arms, hands, legs, and feet. The assessment of lesion activity included erythema, hypertrophy, and scaling, while the damage was reflected by the assessment of hyperpigmentation and scaring/atrophy. In addition, mucosal lesions, nail abnormalities, hair loss, and scarring alopecia were evaluated as well. LiPADI scoring was compared with quality of life assessed with the Dermatology Life Quality Index, EQ-5D calculator, pain and pruritus intensity assessed with the Numerical Rating Scale as well as with the patient and physician global assessment. Results: Our results show that LiPADI well reflects the LP patient’s clinical condition. The obtained results were in line with other indicators assessed. In addition, it was possible to evaluate patients with various forms and locations of LP, what indicates its versatility. Conclusions: LiPADI seems to be a useful tool for measurement the severity of the LP and its progress over time, which could help to monitor the effectiveness of the patients’ treatment.

Intra-individual Right-Left Comparative Study of Combined Therapy of Intramatricial Triamcinolone and Platelet-Rich Plasma vs. Intramatricial Triamcinolone Only in Lichen Planus-Associated Nail Dystrophy

Background

While intramatricial triamcinolone is the most commonly used treatment option for onychodystrophy due to lichen planus, the role of platelet-rich plasma (PRP) in the treatment of onychodystrophy is not established. So we combined the two treatment modalities to assess the synergistic action on nail dystrophy.

Aims and Objectives

The aim of this article is to compare the effect of combination of intramatricial triamcinolone and PRP vs. intramatricial triamcinolone alone in the treatment of onychodystrophy.

Materials and Methods

This study was done in 26 and 25 pairs of symmetrical dystrophic nails in hands and feet, respectively. The patients received intramatricial injection of triamcinolone and PRP on one side of finger and toe nails and triamcinolone on the contralateral side.

Results

Statistically significant improvements in grades of dystrophy according to the Nail Dystrophy Grading System (NDGS) in the finger and toe nails treated with combined therapy were obtained (P < 0.001 and = 0.002, respectively). According to the physician global assessment, response to combination therapy was statistically significant between the two comparison groups of finger and toe nails (P = 0.001 and = 0.004, respectively). Similarly, according to the patient satisfaction score, statistically significant difference was found between the comparison groups of combination therapy and single therapy (P < 0.001).

Conclusion

Addition of PRP significantly improved the nail quality. Intramatricial PRP is a safe and effective therapeutic modality in refractory nail dystrophies.

An Unusual Presentation of Lichen Planus

Lichen planus is a chronic papulosquamous eruption of the skin, scalp, nails, and mucous membranes. "Pruritic, purple, polygonal, planar, papules, plaques" are the traditional six "P's" of lichen planus. We describe an unusual case of lichen planus presenting as cellulitis.

A 64-year-old lady with a past medical history of pyoderma gangrenosum, inclusion body myositis, and chronic kidney disease presented with a two-week history of swelling, erythema, tenderness, hyperkeratotic plaques, and blisters on the medial aspect of both thighs. She had a previous history of pyoderma gangrenosum exacerbations with similar presentations; however, current lesions were different from prior presentations. We considered the differential diagnoses of bacterial cellulitis versus pyoderma gangrenosum exacerbation. Due to the difference in these lesions from previous episodes, the patient was empirically treated for bacterial cellulitis with intravenous cefepime and linezolid. The infectious diseases team was consulted and valacyclovir was added to cover for possible herpes infection, with no improvement in symptomatology. Dermatology was then consulted, and a clinical diagnosis of psoriasiform dermatitis was made. A skin biopsy was obtained and the patient was started on prednisone. There was an immediate improvement in the papules within 24 hours. The papules cleared, leaving behind violaceous flat plaques, clinically diagnosed as lichen planus. The affected area was shrinking as compared to previous examinations. The skin biopsy was reported as chronic psoriasiform dermatitis with the main differential of lichen planus. The patient was discharged home on a tapering dose of oral prednisone, topical clobetasol, and oral moxifloxacin.

This case demonstrates the importance of familiarity with rare clinical subtypes as a suspicion for lichen planus. The vesiculobullous subtype of lichen planus, as seen in this patient, tends to present as blisters and cellulitis from infection of the bullae. Treatment of the infection alone is not enough and steroids are essential. This knowledge helps change management, allows for earlier improvement and better patient outcomes.

Case Report: The First Reported Case of Bullous Lichen Planus-Systemic Lupus Erythematosus Overlap Syndrome

Introduction: Lichen planus/lupus erythematosus overlap syndrome is rarely seen in the clinic and has the characteristic clinical manifestations, histopathology, and immunopathology of lichen planus (LP) and lupus erythematosus (LE). This is the first reported case of bullous lichen planus (BLP)/systemic lupus erythematosus (SLE) overlap syndrome with hair loss as the first symptom. Case Presentation: A 48-year-old female presented with alopecia for half a year, and skin lesions accompanied by itching on her face, trunk, and limbs for 3 months. She had a history suggestive of photosensitivity. Laboratory tests and histopathology were performed for diagnosis. Histopathologic features of the upper arm and back of the hand were consistent with BLP, whereas the scalp lesion indicated LE. Laboratory examination indicated positive for antinuclear antibody (ANA) (1:160), leukopenia, increased urinary protein, decreased C3/C4, and normal BP180. The patient was given glucocorticoid combined with acitretin and immunosuppressive therapy after a definite diagnosis of BLP/SLE overlap syndrome. The lesions of the patient disappeared and some hair had regrown during the two years of follow-up. Conclusion: This is the first reported case of BLP/SLE overlap syndrome which responded well to glucocorticoids, retinoids, and immunosuppressive drugs. Multiple biopsies from characteristic lesions will guide doctors to avoid misdiagnoses and delayed treatment.

Ocular involvement and complications of lichen planus, lichen planus pigmentosus, and lichen planopilaris: A comprehensive review

Ocular involvement of lichenoid dermatoses, such as lichen planus (LP), lichen planus pigmentosus (LPP), and lichen planopilaris (LPL), although uncommon, is associated with skin manifestations. Isolated ocular involvement is very rare. When lesions are confined to the skin, the dermatologist inquires and evaluates for oral and genital symptoms and lesions, respectively; hence, eye manifestations are commonly neglected by the non-ophthalmologist. Ocular involvement in LP, LPP, and LPL may result in significant morbidity. An ophthalmic interrogatory and a gross ophthalmic evaluation performed by the dermatologist may unravel ocular signs and symptoms that require evaluation by an eye specialist. Ocular surface inflammation and scarring, when untreated, results in serious complications such as corneal perforation and permanent vision loss. This review aims to present an up-to-date overview for the dermatologist of the ocular involvement and complications of LP, LPP, and LPL, and when to refer to the ophthalmologist to prevent blinding complications.

Disseminated and recurrent infundibulofolliculitis in children in Mexico

Disseminated and recurrent infundibulofolliculitis is an uncommon non-infectious skin eruption characterized by recurrent, sometimes pruritic, follicular papules commonly seen on the trunk and proximal extremities. We describe the clinical, dermoscopic, and histopathologic characteristics of disseminated and recurrent infundibulofolliculitis in three young pediatric patients from the tropical regions of Mexico, Guerrero, and Chiapas.

A case of annular atrophic lichen planus in a child and review of the literature

Lichen planus (LP) is an inflammatory disease affecting both adults and children that may present with numerous rare morphologies. LP and its many subtypes can prove difficult to treat and often leave patients with dyspigmentation. Additionally, pruritus associated with LP can be distressing to patients. The aim of this report is to highlight an uncommon subtype, annular atrophic lichen planus, which uniquely presented in a child, to emphasize the importance of early disease recognition and finally, to demonstrate successful treatment with topical monotherapy with clobetasol propionate ointment.

Interleukin 36 expression in psoriasis variants and other dermatologic diseases with psoriasis-like histopathologic features

BACKGROUND

Elevated epidermal interleukin (IL)-36 expression distinguishes psoriasis from eczematous dermatitis, but other psoriasiform dermatitides (PDs) have not been thoroughly investigated for IL-36 expression. In this study, we assess the IL-36 staining pattern (IL36-SP) in psoriasis variants and other PDs including lichen simplex chronicus (LSC), prurigo nodularis (PN), lichen planus (LP), tinea, pityriasis rubra pilaris (PRP), mycosis fungoides (MF), pemphigus foliaceus (PF), acute generalized exanthematous pustulosis (AGEP), impetigo (IMP), and syphilis (SY).

METHODS

IL-36 immunostaining was performed on 307 cases of psoriasis and various PDs. IL36-SP in the upper epidermis was graded on a scale of 0-4.

RESULTS

High IL36-SP occurred in all variants of psoriasis, as well as in AGEP, PRP, PN, tinea, IMP, and LP (P > 0.05). SY, PF, LSC, and MF showed a lower IL36-SP (P ≤ 0.05) compared with psoriasis.

CONCLUSION

All variants of psoriasis exhibit high IL36-SP. IL-36 staining can assist in differentiating MF, PF, SY, and LSC from psoriasis, particularly MF and LSC, which have consistent low IL-36 expression. AGEP, PRP, tinea, IMP, PN, and LP exhibit high IL-36 expression similar to psoriasis, indicating Th17 activation in these diseases.

Oxidative Stress in Cutaneous Lichen Planus-A Narrative Review

Lichen planus (LP) is a chronic, immune-mediated inflammatory skin condition that mainly affects the skin (cutaneous LP, CLP) and oral mucosa (oral LP, OLP). However, the mechanisms involved in the pathogenesis of the disease are not fully elucidated. Over time, several theories that could explain the appearance of LP lesions have been postulated. The key players in LP pathogenesis are the inflammatory infiltrate consisting of T cells and the proinflammatory cytokines. The cytokines stimulate the production of reactive oxygen species that induce cell apoptosis, a defining element encountered in LP. The lead inquiry triggered by this revolves around the role of oxidative stress in LP development. There are currently numerous studies showing the involvement of oxidative stress in OLP, but in terms of CLP, data are scarce. In this review, we analyze for the first time the currently existing studies on oxidative stress in CLP and summarize the results in order to assess the role of oxidative stress in skin lesions offering a fresher updated perspective.

[Esophageal Lichen Planus - an Underdiagnosed Disease]

An involvement of the esophagus in patients with lichen planus was described for the first time in 1982. Ever since, it has been seen as a rarity. However, studies over the last 10 years have shown a higher prevalence than expected. It may even be supposed that esophageal lichen planus (ELP) is more common than eosinophilic esophagitis. ELP mostly affects middle-aged women. The principal symptom is dysphagia. Endoscopically, ELP is characterized by denudation and tearing of the mucosa, trachealization and hyperkeratosis and esophageal stenosis may occur in patients with long courses of the disease. Histologic findings including mucosal detachment, T-lymphocytic infiltrate, intraepithelial apoptosis (civatte bodies) and dyskeratosis are crucial. Direct immunofluorescence shows fibrinogen deposits along the basement membrane zone. So far, there is no well-established therapy but a treatment with topic steroids is effective in 2/3 of the patients. Common therapy of lichen planus of the skin seems to be ineffective for treatment of ELP. Symptomatic esophageal stenosis should be endoscopically dilated. ELP joins the group of "new" immunologic diseases of the esophagus.

Subepithelial autoimmune blistering dermatoses: Clinical features and diagnosis

Subepithelial autoimmune blistering dermatoses are a group of rare skin disorders that are characterized by the disruption of the dermal-epidermal junction through the action of autoantibodies. The third article in this continuing medical education series explores the background, epidemiology, clinical features, and diagnostic criteria of each of the major subepithelial autoimmune blistering dermatoses, including bullous pemphigoid, pemphigoid gestationis, lichen planus pemphigoides, mucous membrane pemphigoid, linear IgA bullous dermatosis, and dermatitis herpetiformis.

Occipital Fibrosing Alopecia in a Young Male: A Case Report

Introduction

Lichen planopilaris (LPP) is a primary lymphocytic cicatricial alopecia with 3 recognized clinical variants. Lately, LPP clinical spectrum has expanded with new and overlapping clinical variants. First considered as a subtype of LPP affecting postmenopausal women, the increasing worldwide incidence of FFA including atypical lesions in young female and male suggests a different pathomechanism for this disease. Although LPP-spectrum disorders may share similar histopathological findings, clinical features and prognosis are different.

Case Report

A 26-year-old Caucasian male presented with occipital scarring alopecia and pruritus for the last 6 months. The patient had been treated for an associated androgenetic alopecia and superficial recurrent scalp folliculitis over the vertex scalp for the last 5 years. Trichoscopy of the occipital scalp showed mild diffuse erythema, moderate peripilar scaling, and absence of follicular openings, suggestive of a scarring process. The patient underwent an occipital scalp biopsy that confirmed the diagnosis of a LPP-spectrum disorder.

Discussion/Conclusion

Both LPP and FFA mostly affect the anterior-mid scalp of females. However, recent reports on FFA also in premenopausal women and men should make physicians aware of atypical features of this disease and unusual clinical presentation.

Prevalence of HPV in patients affected by oral Lichen planus: A prospective study using two different chair-side sampling methods

BACKGROUND

Human Papillomavirus (HPV) role in oral potentially malignant lesions remains unclear. Aims of this study were to evaluate the prevalence of HPV infection in a cohort of patients affected by oral lichen planus, to analyze the genotypes involved, and to compare the performance of two specimen collection methods: brushing and biopsy.

METHODS

Consecutive patients with oral lichen planus were enrolled. Each patient's clinical and anamnestic data were recorded before he/she underwent brushing and biopsy procedures. The collected samples were analyzed using RT-PCR. Prevalence of HPV infection was evaluated considering cytobrush and biopsy outcomes alone and combined. Correlation between HPV presence and sex, age, smoke, alcohol, kind of lichen planus, Hepatitis C virus, and involved mucosae was analyzed using chi-square test (significance at P < .05). Cohen's k coefficient was employed to compare brushing and biopsy.

RESULTS

Fifty-two patients affected by oral lichen planus were enrolled. Total HPV prevalence was 17%, when considering only the biopsy and the cytobrush the prevalence was 15% and 6%, respectively. None of the considered variables showed significant correlation with HPV (P > .05). The concordance between the two methods was "fair" (k = .305).

CONCLUSIONS

The biopsy appears more reliable than cytobrush to detect HPV in course of oral lichen planus. No statistical correlation emerged with the analyzed variables. The most frequently detected genotypes were HPV 6 and 11, while only two cases presented with HPV 16 and 53, known as human oncogenic.

Oral Health Messiers: Diabetes Mellitus Relevance

This article aims to narrate the various oral complications in individuals suffering from diabetes mellitus. Google search for "diabetes mellitus and oral complications" was done. The search was also carried out for "diabetes mellitus" and its oral complications individually. Diabetes mellitus is a chronic metabolic disorder that is a global epidemic and a common cause of morbidity and mortality in the world today. Currently, there are about 422 million cases of diabetes mellitus worldwide. Diabetic patients can develop different complications in the body such as retinopathy, neuropathy, nephropathy, cardiovascular disease. Complications in the oral cavity have been observed in individuals suffering from diabetes mellitus. A study noted that more than 90% of diabetic patients suffered from oral complications. Another research has shown a greater prevalence of oral mucosal disorders in patients with diabetes mellitus than non-diabetic population: 45-88% in patients with type 2 diabetes compared to 38.3-45% in non-diabetic subjects and 44.7% in type 1 diabetic individuals compared to 25% in the non-diabetic population. Oral complications in people with diabetes are periodontal disease, dental caries, oral infections, salivary dysfunction, taste dysfunction, delayed wound healing, tongue abnormalities, halitosis, and lichen planus. The high glucose level in saliva, poor neutrophil function, neuropathy, and small vessel damage contribute to oral complications in individuals with uncontrolled diabetes. Good oral health is imperative for healthy living. Oral complications cause deterioration to the quality of life in diabetic patients. Complications like periodontal disease having a bidirectional relationship with diabetes mellitus even contribute to increased blood glucose levels in people with diabetes. This article intends to promote awareness regarding the oral health of diabetics and to stress the importance of maintaining proper oral hygiene, taking preventive measures, early detection, and appropriate management of oral complications of these patients through a multidisciplinary approach.

[Lichen planus: fundamentals, clinical variants, histological features, and differential diagnosis]

Lichen planus (LP) is a relatively common inflammatory skin disease in dermatological practice. The typical presentation of LP is usually diagnosed clinically. Less common variants such as LP inversus, atrophic LP, the palmoplantar manifestation or childhood LP may pose diagnostic difficulties so that a biopsy is taken to confirm the diagnosis. Differentiation from LP-like drug eruption may be challenging and biologicals have to be considered as triggers. Etiology and pathogenesis of LP are discussed based on recent literature. Finally, an overview of therapeutic options for different variants of the condition includes most recent approaches to treatment.

A Case of Lichen Planus Masquerading as Guttate Psoriasis

Lichen planus (LP) is a chronic inflammatory disease that affects the skin, hair, nails, and mucous membranes, with variants such as drug-induced lichen planus, which is triggered by medications such as angiotensin-converting enzyme (ACE) inhibitors and antimalarials. Guttate psoriasis (GP), a clinical variant of psoriasis, is associated with streptococcal infections and presents with drop-like papules on the trunk and proximal extremities. In this report, we present a case of LP in an atypical location masquerading as GP and the importance of prompt dermatological referral to improve the patient’s quality of life. Coexistence and similarities between several variants of LP and plaque psoriasis have been seen in the literature. However, to our knowledge, our report is the first to show LP specifically mimicking GP.

A new index to assess the severity of Lichen planus in clinical practice

Purpose.Development and validation of the severity index of lichen planus (LP). Materials and methods.At the first stage, by means of theoretical substantiation, the main parameters and signs were identified that affect the severity of the disease and the quality of life of patients, which culminated in the derivation of the final index formula, which was called the lichen area and severity index (LPASI). At the second stage, LPASI was validated during the examination of 45 LP patients who were treated in the clinic of skin and venereal diseases of the Military Medical Academy in 20182019. Determination of LPASI was carried out by five dermatovenerologists independently of each other twice with an interval of one week. The analysis of the results was carried out using STATISTICA 10.0 programs and SPSS Statistics 17.0. The Spearman Brown and Pearson correlation coefficients were used to evaluate the intra-expert and inter-expert reliability of the index, and the Cronbach's alpha coefficient was calculated to assess the internal consistency of the scale. Results.The final formula for calculating LPASI is as follows: 0.2A+2B+5С+D, where A is the area of skin lesions in percentage, B is the severity of clinical manifestations on the skin, C is the severity of clinical manifestations on the oral mucosa and D is the severity of subjective sensations. The index can range from 0 to 82. The LPASI values for the whole group (n=45) were characterized by a normal distribution of the trait (p0.05), the minimum and maximum values varied from 7.2 to 42 points, the median was 22 points, the interquartile span from 14 to 27 points. The values of the Spearman Brown and Pearson coefficients were equal to 0.91 (95% CI 0.890.99) and 0,87 (95% CI 0.860.93), which indicates the reproducibility of the results and the reliability of the index. In this case, a high consistency between the selected features within the scale (Cronbach's alpha criterion 0.93) was established. Conclusion.Objectification of the severity of the disease using LPASI should become an integral part of the clinical examination of patients. The use of LPASI will allow to control the effectiveness of prescribed therapy, as well as to compare the results of scientific research.

Quality of life and mental health status in patients with lichen planopilaris based on Dermatology Life Quality Index and General Health Questionnaire-28 questionnaires

Background

Lichen planopilaris (LPP) is a relatively uncommon inflammatory skin condition that causes permanent hair loss. Irreversible hair loss can have a significant psychosocial and psychological impact on patients’ lives. Limited studies have assessed the psychological status of patients suffering from LPP, and to our knowledge, none have evaluated patients with LPP as a separate group in this regard.

Objective

This study aimed to assess the quality of life (QoL) and general health of patients with LPP using the Dermatology Life Quality Index (DLQI) questionnaire and General Health Questionnaire-28 (GHQ-28), respectively.

Methods

Our study employed a cross-sectional design. In total, 41 patients with LPP attending the follow-up skin clinic at the Razi Hospital in Tehran, Iran were asked to complete the DLQI and GHQ-28. Furthermore, selected demographic information was obtained from patients to evaluate their association with general health and QoL.

Results

Forty-one patients (14 men and 27 women) with a mean age of 44.02 ± 10.8 years completed both questionnaires. QoL was affected moderately to extremely in 70.7% of patients. Also, 26 patients (63.4%) were at risk for psychological disorders. Lower QoL was reported by patients age <45 years (p < .05). Both QoL and general health had a negative relation with the disease activity index (p < .05), but were not affected by sex, marital status, education level, treatment type, presence of mucous lesions, and disease duration.

Conclusion

LPP significantly affects patients’ QoL and general health. Dermatologists should address these issues in patients with LPP alongside treating physical symptoms.

IFN-γ enhances cell-mediated cytotoxicity against keratinocytes via JAK2/STAT1 in lichen planus

Lichen planus (LP) is a chronic debilitating inflammatory disease of unknown etiology affecting the skin, nails, and mucosa with no current FDA-approved treatments. It is histologically characterized by dense infiltration of T cells and epidermal keratinocyte apoptosis. Using global transcriptomic profiling of patient skin samples, we demonstrate that LP is characterized by a type II interferon (IFN) inflammatory response. The type II IFN, IFN-γ, is demonstrated to prime keratinocytes and increase their susceptibility to CD8⁺ T cell-mediated cytotoxic responses through MHC class I induction in a coculture model. We show that this process is dependent on Janus kinase 2 (JAK2) and signal transducer and activator of transcription 1 (STAT1), but not JAK1 or STAT2 signaling. Last, using drug prediction algorithms, we identify JAK inhibitors as promising therapeutic agents in LP and demonstrate that the JAK1/2 inhibitor baricitinib fully protects keratinocytes against cell-mediated cytotoxic responses in vitro. In summary, this work elucidates the role and mechanisms of IFN-γ in LP pathogenesis and provides evidence for the therapeutic use of JAK inhibitors to limit cell-mediated cytotoxicity in patients with LP.

Uncovering subtle nail involvement in lichen planus with dermoscopy: a prospective, controlled study

Introduction

There are very few studies investigating the dermoscopic aspect of nail involvement in lichen planus and these studies described dermoscopic features of only clinically visible nail involvement in lichen planus.

Aim

To reveal subtle dermoscopic nail findings in patients with lichen planus.

Material and methods

The study included 40 patients with lichen planus and 40 healthy volunteers. All fingernails of the patients and healthy volunteers were examined by a handheld dermoscope and the findings detected were recorded. The patients were grouped by age, gender, disease duration and extent of the disease. The statistical analysis was performed using Chi square test.

Results

82.5% of the patients and 17.5% of the healthy volunteers showed at least one dermoscopic nail finding. The frequency of multiple splinter haemorrhage (p < 0.05), multiple leukonychia (p < 0.05), longitudinal erythronychia (p < 0.05), prominent hyponychial vascular structures (p < 0.05) and onycholysis (p < 0.05) observed in the patients group was statistically significant. The other findings included distal short longitudinal lines, onychorrhexis, solitary splinter haemorrhage and solitary punctate leukonychia and showed no statistically significant differences between the two groups.

Conclusions

To the best of our knowledge, this is the first study focusing on uncovering subtle nail involvement in lichen planus. The presence of dilated hyponychial vascular structures in lichen planus was first described in the present study. It can be concluded that the frequency of nail involvement in lichen planus is more than known. Dermoscopic imaging of the nails of all patients with lichen planus may help establish early diagnosis and treatment to avoid permanent nail damage.

Eruptive Lichen Planus Associated With Chronic Hepatitis C Infection Presenting as a Diffuse, Pruritic Rash

Lichen planus has been associated with several precipitating factors, such as drugs, immunizations, and viral infections, including hepatitis C virus (HCV). Eruptive or disseminated lichen planus is a rare variation that most often presents as an acute, widespread exanthem that progresses rapidly and usually lasts for a shorter duration. This variation has not been well studied, and little is known about the etiologies and treatments of this rare form. Thus far, only a few cases of eruptive lichen planus have been reported to be associated with HCV infection. We report a case a 62-year-old woman who presented with a rapidly progressive, diffuse, pruritic rash of the trunk, upper extremities, and thighs that was determined to be eruptive lichen planus secondary to chronic HCV infection. The patient was treated with topical steroids and oral antihistamines, and her rash spontaneously resolved approximately six months after the initial presentation.

Genital lichen planus: An underrecognized entity

Genital lichen planus (LP) is an underrecogonized dermatosis. The appearance is often unlike classical LP elsewhere, and hence, the condition goes undiagnosed in many. Vulvo-vaginal LP in particular, can be a distressing condition often leading to scarring and a poor quality of life. Treatment for most of the genital LP variants is similar to managing LP elsewhere; however, the erosive variant requires special attention as treatment outcomes are often disappointing and the disease runs a protracted course. Potential for development of malignancy also exists, as in oral LP, and hence close follow up is essential.

Successful treatment of psoriatic arthritis and comorbid annular atrophic lichen planus with etanercept

Psoriasis vulgaris and lichen planus are distinct T-cell-driven inflammatory skin diseases. Both present in a variety of clinical subtypes. Mucosal or nail involvement may be present. Here, we report the rare concomitant clinical presentation of psoriatic arthritis and annular atrophic lichen planus on the trunk of a 52-year-old male patient. Treatment with sulfasalazine failed to control inflammatory activity; methotrexate and leflunomide were ceased due to side-effects. After confirmation of both diagnoses, we initiated a tumor necrosis factor (TNF)-α-directed therapy with the fusion protein etanercept resulting in significant improvement of both conditions. This case report aims to highlight the rare colocalization of psoriasis and lichen planus, the rare entity of annular atrophic lichen planus, and to discuss a possible beneficial impact of certain TNF-α inhibitors on subtypes of lichen planus.

Hypertrophic lichen planus of the vulva - A missed diagnosis

Lichen planus (LP) is an inflammatory dermatosis which can affect the skin, nails, and all mucous membranes, including the genitalia. Lichen planus on vulvar keratinized skin can manifest with diverse clinical features, probably due to higher temperature, PH, humidity, and bacterial flora which may modify typical cutaneous features. While lichen planus (LP) may affect the vulva in isolation, it may also be part of generalized outbreak in up to 20% cases. Herein, a case of a 53 year-old female who presented with a severely pruritic plaque over labia majora Since 6 -7 months, with no response to potent topical corticosteroids is reported. Provisional diagnosis of lichen simplex chronicus was considered however, histopathology was suggestive of hypertrophic lichen planus.

The rashes that lead to cutaneous ulcers

Skin rashes have exanthema as a synonym, a term derived from the Greek words exanthem, meaning "to appear," and anthos, which denotes "flourishing." The relevant factors for characterization of a rash include distribution, configuration, and organization of the lesions, in addition to evidence of systemic involvement through toxemia, adenopathy, and conjunctive lesions, hepatosplenomegaly, excoriations or phlogosis, neck rigidity, or neurologic dysfunction. A rash may evolve to cutaneous ulceration in many instances, which is relevant for the diagnosis, the followup, and the therapeutic management of the patient. Systemic diseases with exanthemas that result in ulcerations prevail over diseases that are restricted to signs and/or merely cutaneous clinical manifestations. A variety of etiologies can present cutaneous rashes with ulcers, subject or not to systemic involvement by the underlying disease, among which stand out the bullous diseases, infectious and parasitic diseases, noninfectious granulomatous diseases, vasculitis, paraneoplastic syndromes, autoimmune diseases of the connective tissue, neutrophilic diseases, lichen planus, and drug hypersensitivity syndrome. The authors present a detailed review of some diseases corresponding to each one of the mentioned etiologies, updating the clinical manifestations and therapeutic proposals.

Epidemiologic and Clinical Differences Between Classic and Hypertrophic Lichen Planus in Nigeria

Introduction. Lichen planus is a chronic inflammatory skin disease known to have several clinical variants with attended variable clinical outcomes. Certain complications have been observed in the hypertrophic type, which were not found in association with the classic variant.

Objective: To identify the epidemiologic and clinical differences between the classic and hypertrophic lichen planus and clinical correlates.

Material and Methods. Of 104 participants with lichen planus included in the study, 49 had classic and 55 hypertrophic lichen planus. Demographic and clinical information was obtained. Diagnosis of lichen planus was made clinically and confirmed with histology. The participants were screened for metabolic syndrome, hepatitis B, and C.

Results: Mean age of all patients was 37.20±13.39 years, with no age and gender differences between the participants with classic and hypertrophic lichen planus. Classic lichen planus was more likely to be painful, (8.2% vs 0.0, p=0.046), generalized (95.9% vs 16.4%, p<0.001), involve the oral mucosa (38.8% vs 0.0, p<0.001), the nails (38.8% vs 1.8, p<0.001), present with kobnerisation (55.1% vs 5.5%,<0.001), Wickhiam striae (69.4% vs 16.4%, p<0.001), associated with Hepatitis B vaccination (16.3% vs 3.6%, p<0.028) and anti HCV positivity (16.3% vs 0.0%, p=0.002). Hypertrophic lichen planus was significantly associated with impaired glucose tolerance/diabetes mellitus (16.4% vs 2.0%, p=0.013), dyslipidemia (74.5% vs 40.8%, p=0.001) and saw-tooth histologic appearance compared to classic type.

Conclusion: Hypertrophic lichen planus is more likely to be associated with metabolic complications compared to the classic type. Further studies are needed to loink this difference t chronic inflamation.

Esophageal lichen planus: towards diagnosis of an underdiagnosed disease

Background: Although lichen planus (LP) is a common skin disorder, the prevalence of esophageal involvement (ELP) and its clinical manifestations are poorly defined. We aimed to establish diagnostic criteria and characterize disease outcomes of ELP.Methods: Clinical, endoscopic, histological, and immunofluorescence data from consecutive patients with known LP between 2013 and 2018 were analyzed. We established endoscopic (denudation and tearing of the mucosa, hyperkeratosis and trachealization) and histological criteria (mucosal detachment, T-lymphocytic infiltrate, intraepithelial apoptosis, dyskeratosis, and fibrinogen deposits along the basement membrane) to grade disease severity. Endoscopic findings were correlated with clinical symptoms. Response to medical therapy was monitored.Results: Fifty-two consecutive patients (median age 59.5 years) were analyzed. According to our grading system, 16 patients were considered as severe and 18 as mild ELP. Dysphagia was the only symptom which differentiated patients with severe (14/16) or mild ELP (8/18) from patients without ELP (1/18). Concomitant oral and genital involvement of LP was associated with the presence of ELP, while oral involvement alone was not. Follow-up of 14/16 patients with severe EPL for at least one year revealed that most of these patients responded to topical corticosteroids (budesonide: n = 9/10 or fluticasone n = 2/2). Three budesonide patients experienced a resolution of symptomatic esophageal stenosis.Conclusions: Esophageal involvement of LP is frequent, but may be asymptomatic. ELP can be diagnosed using the diagnostic criteria proposed here. Dysphagia and combined oral and genital manifestation are associated with ELP. Therapy with topical corticosteroids appears to be a prudent therapeutic approach for ELP.

Chronic Pruritus Responding to Dupilumab-A Case Series

Background: Chronic pruritus is defined as itch lasting for greater than six weeks. Pruritus is a burdensome manifestation of several internal and external disease states with a significant impact on quality of life. Dupilumab has shown promise in treating a number of conditions including atopic dermatitis (AD) and asthma. Its success in reducing pruritus in AD has generated interest regarding its potential application in other pruritic conditions, such as chronic pruritus of unknown origin, uremic pruritus, and pruigo nodularis. Methods: In this retrospective analysis, we present a series of 20 recalcitrant pruritus patients seen at a tertiary center treated with off-label dupilumab at standard AD dosing. Results: Dupilumab was successful at reducing itch in all treated patients, leading to complete resolution in 12/20 patients and an overall mean NRSi reduction of 7.55. Dupilumab was well tolerated with no significant adverse effects. Conclusions: Our case series suggests dupilumab may be a safe and efficacious therapeutic option in several pruritic conditions and demonstrates the need for further studies to better ascertain its place in the pruritus treatment armamentarium.

Bullous Lichen Planus: Case Report and Review

Lichen planus is a chronic inflammatory mucocutaneous disorder that is seen in skin and oral mucosa. Definitive etiology for oral lichen planus remains unknown. It may or may not be associated with skin lesions. Different clinical patterns such as reticular, plaque, erosive, bullous, and atrophic are seen in oral mucosa of which bullous lichen planus is a rare entity. We present a unique case of bullous lichen planus in a 20-year-old male without skin manifestations along with the review of literature comprising various case reports of bullous lichen planus.