Oral Lichen Planus Department Of Oral Medicine & Radiology, IDST Under the Guidance of: Dr. Shalu Rai Dr. Rohit Malik Dr. Deepankar Misra Dr. Sapna Panjwani Dr. Sankalp Verma Ashish Angural Roll. 17
Oral Lichen Planus Aka Lichen Rubber Planus First described clinically :- 1869 – WilsonFirst described histologically by:- 1906 - Dubreuilh
Erasmus Wilson (1869)-Mixed non Scrapable Red andwhite lesion in the mouth-Can occur individually or with skinlesions *Lichen in Greek – tree moss *Planus in Latin - flat
Epidemiology• 1% of general population is affected• 0.14-0.8% worldwide• 2/3rd of cases occur in middle age• No racial predilection reported although some authors claims a predilection in blacks• Increased in the month of Jan-July & Dec-Jan
• Male: Female - 1:1• 20% females with oral lesions have genital involvement• 2/3rd of the cases are symptomatic• 40%- of patients have both Oral & Cutaneous lesions• 35%- of patients have Cutaneous lesions only• 25%- of the cases presents with mucosal lesions only
Etiology• Etiology is unknown.• Immune System has a primary role in the development of this disease.• Genetic background• Dental materials- metallic & non metallic restoration• Drugs & chemicals• Infectious agents• Autoimmunity• Chronic liver disease• Immunodeficiencies
Infectious agents• Gm –ve anaerobic bacillus & spirochetes.• increased prevalence of Candida species in both mycological and histological studies of oral lichen planus.• In HIV + ve patients.• Human papilloma virus in oral lichen planus lesions.• HCV is a virus that has high rate of mutation. This results in a repeated activation of immune cells increasing the likelihood of cross reaction with self tissues and therefore increasing the risk for developing autoimmune diseases.
Habits• Smoking as an etiologic factor in some Indian communities• There is an increased prevalence of betel nut chewing among lichen planus patients• Plaque type of lichen planus is most commonly seen in smokers & less of reticular and atrophic variety.
Trauma:Chronic trauma from a improper restoration or toothitself is considered as a risk factor for thedevelopment of oral lichen planus.Diabetes & Hypertension:impaired glucose metabolism in a high percentage oflichen planus patientsin a diabetic individual lingual involvement & erosiveforms are more common.Grinspan 1966-described association ofdiabetes, hypertension with oral lichen planus andcalled it as Grinspan syndrome
Stress• Any stress causes activation of adrenal medullary system.• This leads to secretion of catecholamines like adrenaline and noradrenaline.• These hormones have got immunosuppressive activity which results in lichen planus like lesions
Pathogenesis• TARGET :- Epithelial basal cells-Cell mediated immune process involving Langerhans cells, T-lymphocytes, & macrophages-T lymphocytes become cytotoxic for basal keratinocytes.
DefinitionLichen planus is a unique common inflammatorydisorder that affects the skin, mucousmembrane, nails and hair.Oral lichen planus is a relatively common chronicinflammatory immunologic reaction in whichepidermal or epithelial basal cell damageproduces mucocutaneous lesions of varioustypesOral lichen planus is a common chronicimmunologic inflammatory mucocutaneousdisorder that varies in appearance from keratotic(reticular/plaque like) to erythematous orulcerative
Oral Lichen Planus clinical features• Disease of middle age• Males = Females• Children rarely affected• Severity of disease often parallels patient’s level of stress• 2/3 are asymptomatic• Usually present bilaterally• Most common site: posterior buccl mucosa• Other locations: tongue, gingiva,alveolar mucosa, palate, lip(mucosal side)• Characteristic feature: Wichams striae.
Lichen Planus Extra oral features• Characteristic 4p’s- purple, polygonal,, pruritic, papule- characteristic Cutaneous lesions• Wickhams striae• The classic appearance of skin lesions consists of erythematous to violaceous papules that are flat topped and occasionally polygonal in form. A network of white lines often overlies the papules.
• Koebners phenomena- it refers to development of papules along the line of trauma in a linear fashion. Most commonly seen on skin.• Penogingival syndrome- male analog of vulvovaginal gingival syndrome- rare in males• vulvovaginal gingival syndrome- Association of Vulva, vagina & gingiva as the• Lichen planopilaris is the involvement of the scalp & hair follicles by lichen planus which results in scarring alopecia• Symptoms like burning, pain, vaginal discharge- erosive & erythematous types
Types of Oral Lichen Planus1.Reticular form2.Papular type3.Plaque- like4.Bullous5.Erythematous or Atrophic6.Ulcerative
1.Reticular form• Characterised by fine white lines or striae.• striae may forma network or show annular patterns.• Often displays a peripheral erythematous zone reflecting sub epithelial inflammation.• Most frequently observed in buccal mucosa (bilaterally)• Rarely on lips (mucosal side)• May also be seen on Vermillion border.
2.Papular type• Usually present in intial phase of disease• Characterised by small white dots• Minute white papules• These gradually enlarge to form either a reticular, annular, or plaque pattern.In most occasions it intermingles withReticular form.
3.Plaque type• Shows a homogenous well demarcated white plaque oftenly but not always, surrounded by striae.• Simultaneous presence of Reticular & Papular structures seen• Most oftenly seen in smokers.• Confluent white patches similar to oral keratoses
4.Bullous Form• This form of OLP is quite rare.• May appear as Bullous structure surrounded by a reticular network.• The intraoral bullae rupture soon after they appear, resulting in the classic appearance of erosive OLP.
5.Erythematous or Atrophic form• Characterised by homogenous red area• In buccal mucosa or palate, striae are seen at periphery• May exclusively affect attached gingiva• May occur without any papules or striae and presents as Desquamative Gingivitis• Can be very painfull• Red lesions often with a whitish border.• May cause erosions.
1. Hyperorthokeratosis/Hyperparakeratosis2. Acanthosis3. Thickening of the granular cell layer4. Basal cell liquefaction5. Saw tooth configuration of the rete pegs6. Band like dense inflammatory cellular infiltrate in the upper lamina propria
Differential diagnosis• Squamous Cell Carcinoma• Lichenoid reaction contactant-history• Pemphigus vulgaris-microscopic examination of acantholysis• Candidasis-pseudomembrabe can be rubbed• Chronic cheek biting / chewing• Dermatitis Herpetiformis• Discoid lupus erythematosus-not in fine reticular pattern• Leukoplakia-men more,in LP Wicham’s straie• Atrophic glossitis in tertiary syphilis-red centre with raised margin
Systemic retinoids:• It can also be used at a starting dose of Etretinate of 1.6 to 0.6 mg/day/kg for 2 months followed by maintenance dose of Etretinate of 0.3mg/kg/day or 0.1%• Tretinoin in a adhesive base applied topically twice daily similarly systemic Isotretinoin (13-cis-retinoic acid) can be used in dosage of 10-60mg/day for 2 monthsTopical retinoids:• Topical Tretinoin 0.1% in an adhesive gel (4 times a day for 2 months)• Topical Isotretinoin 0.1% (2 times a day for 2 months) also appears to be effective in 85% of patients.• A new topical retinoid Tazarotene has been found to be used in the treatment of oral lichen planus and demonstrated to be helpful in hyperkeratotic oral lichen planus.
• Immunosuppressive agents:• Azathioprine: It is used in the dose of 75- 150mg/day for about 1-2 months. Long term use may increase the risk of internal malignancy.• Cyclosporine: It is used in the dose of 6mg/kg/day. The adverse side effects include is most importantly renal dysfunction and hypertension.• Topical cyclosporine can also be used. Mouth rinses (450-1500mg/day for 8-12 weeks) and finger applications of base of solution (100mg/day for 4 weeks) or a cellulose base preparation of cyclosporine (48mg/day for 8weeks) produce significant improvement in oral lichen planus with no side effects and little systemic absorption.
• Tacrolimus: Topical tacrolimus seems to penetrate better than topical cyclosporine. Local irritation is the most common side effect. It is used as a dose of 0.1% topical ointment.• Dapsone: it has been used to treat the various inflammatory and infectious dermatoses. Significant side effects like headache and haemolysis have been reported.• Antibiotics: 2% aureomycin mouthwash. Tetracyclines has also been proved to be useful in the treatment of gingival lesions in some reports.• Glycyrrhizin: the successful treatment of oral lichen planus with chronic hepatitis C infection has been reported in patients on use of glycyrrhizin. It is given intravenously.
• Interferon: topically applied gel containing human fibroblast interferon( HuFN-β ) and interferon α cream may improve oral erosive lichen planus. Systemic interferon can be used in the dose of 3-10 million IU thrice weekly.• Levamisole: it is used as an immunomodulator in oral lichen planus. It is used in the dose of about 150mg/day for 3 days in a week for 3 consecutive weeks. However levamisole itself can induce lichen planus like lesions.• Mesalazine: it is 5 aminosalicylic acid is a relatively new drug widely used in the treatment of inflammatory bowel disease. Topically it is as effective as that of steroid. It itself can induce lichen planus.• Phenytoin & Reflexotherapy are the other modes of treatment used.
• PUVA:• ultraviolet irradiation along with the psoralens may suppress the cell mediated immunoreactivity in epermental animal models and humans.• PUVA treatment usually begins with the Methoxpsolaren- 0.6mg/kg or equivalent taken 2hr prior to UV irradiation.• An apparatus for Light cured dental fillings can be used as an irradiation source to deliver a beginning dose of 0.75J/sq.cm initially and a total dose ranging from 11.6-16.5J/Sq.cms.• Oncogenic potential is a serious side effect thought to be caused due to use of PUVA.• Extracorporeal photochemotherapy• use of 308 nm UVB excimer laser in th treatment of lichen planus.• Surgery:• Excision – although this is not the first treatment of choice. It is done in cease of refractory for the rest of the treatment.• CO2 laser• Cryosurgery
Complications• Malignant change is found in about 0.4- 3.5% over a period of 0.5-20 yrs.• Commonly malignant transformation is seen with the variants such as- erosive/atrophic/ulcerative variant• 1% of oral lichen planus shows malignant transformation.
Conclusion• Oral lichen planus is a complex and poorly understood clinical condition which cannot be cured. A definitive diagnosis and careful, conscientious follow-up are imperative. Symptoms and complications are common and challenging but may be managed with a variety of therapies including orally administered and systemic medications as well as lifestyle alterations and reduction of precipitating factors.
References• Burket’s 11th edition• Woods & Goaz, differential diagnosis• Internet • WIKIPEDIA • www.mndental.org • www.emedicinemedscape.com • www.dermnetnz.org • www.rxdentistry.com • Google photos • Vincent, S.D., Fotos • Wilson, E.: On lichen planus. J Cutan Med Dis Skin