dermatitis lichen disease lichen planus https://www.malacards.org/card/lichen_planus UMLS:C0023646 ICD10WHO:L43 MESH:D008010 MONDO:0006572 ICD9:697.0 A chronic, recurrent, pruritic inflammatory disorder of unknown etiology that affects the skin and mucus membranes. It presents with rashes and papules that tend to resolve spontaneously. It may be associated with hepatitis C. Certain drugs that contain arsenic or bismuth are associated with reactions mimicking lichen planus. lichen ruber planus NCIT:C3189 ICD10CM:L43 SCTID:4776004 ruber planus icd11.foundation:1402978031 EFO:1000726 DOID:9201 MEDGEN:9753