all are true regarding lichen planus except ?

Lichen Planus : Lichen planus is a cell-mediated immune response of unknown origin. It may be found with other diseases of altered immunity, such as ulcerative colitis, lichen sclerosis, myasthenia gravis etc. Lichen planus has been found to be associated with hepatitis C virus infection, chronic active hepatitis, and primary biliary cirrhosis It is most likely an immunological mediated reaction, though the pathophysiology in unclear. Clinical Presentation o The clinical presentation of lichen planus has several variations, as follows: o Hyperophic lichen planes o Atrophic lichen planes 0 Erosive/ulcerative lichen planes 0 Follicular lichen planes (lichen planopilarisl Annular lichen planes Linear lichen planes Vesicular and bullous lichen planes Actinic lichen planes Lichen planes pigmentosus Lichen planes pemphigoides MANAGMENT Treatments and Rationale Treatments may include: Antihistamines Medicines that calm down the immune system, such as cyclosporine (in severe cases) o Lidocaine mouthwashes to numb the area and make eating more comfoable (for mouth sores) o Topical coicosteroids (such as clobetasol) or oral coicosteroids (such as prednisone) to reduce swelling and lower immune responses o Coicosteroids shots into a sore o Vitamin A as a cream (topical retinoic acid) or taken mouth (acitre tin) Dressings placed over skin medicines to protect from scratching Ultraviolet light therapy for some cases ref : thomas habif 7th ed