Generally the diagnosis is based on clinical findings.
Occasionally biopsy is required in atypical cases (in order to demonstrate typical histological features, a biopsy of a fully developed lesion should be taken) (1).
Differential diagnoses of cutaneous LP includes eczema, lichen simplex chronicus, pityriasis rosea, prurigo nodularis and psoriasis. Those of oral lichen planus include bite trauma, leukoplakia and thrush. For lichne planopilaris differential diagnoses include discoid lupus erythematosus, pseudopelade of Brocq, alopecia areata and seborrhoeic dermatitis
Contributor : Dr Maryanne Hammon (GP; 23/3/14)
Reference:
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