Lichenoid eruption

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| name = Lichenoid eruption

| image = Histopathology of lichenoid drug reaction.jpg

| caption = Histopathology of lichenoid drug reaction. It resembles lichen planus because of irregular epithelial hyperplasia, focal hypergranulosis, orthokeratosis, and a “saw-tooth” pattern of rete ridges.

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A lichenoid eruption is a skin disease characterized by damage and infiltration between the epidermis and dermis.{{MeshName|Lichenoid+eruptions}}

Examples include lichen planus, lichen sclerosus and lichen nitidus. It can also be associated with abrasion or drug use.{{cite web |url=http://www.merckmedicus.com/ppdocs/us/hcp/content/white/chapters/white-ch-008-s004.htm |title=White : Diseases of the Skin - Lichen Planus and Lichenoid Disorders }} It has been observed in conjunction with the use of proton pump inhibitors, and might be a sign and/or symptom of lupus such as subacute cutaneous lupus erythematous, according to the case reports and reviews.{{cite journal | last1=Brauer | first1=J | last2=Votava | first2=HJ | last3=Meehan | first3=S | last4=Soter | first4=NA | title=Lichenoid drug eruption. | journal=Dermatology Online Journal | volume=15 | issue=8 | date=2009-08-15 | issn=1087-2108 | pmid=19891921 | page=13}}{{cite journal |vauthors=Bong JL, Lucke TW, Douglas WS |title=Lichenoid drug eruption with proton pump inhibitors |journal=BMJ |volume=320 |issue=7230 |pages=283 |date=January 2000 |pmid=10650025 |pmc=27275 |doi= 10.1136/bmj.320.7230.283|url=http://bmj.com/cgi/pmidlookup?view=long&pmid=10650025}}{{cite journal | last1=Tukenmez Demirci | first1=Gulsen | last2=Altunay | first2=Ilknur Kivanc | last3=Sarikaya | first3=Sezgi | last4=Sakiz | first4=Damlanur | title=Lupus erythematosus and lichen planus overlap syndrome: a case report with a rapid response to topical corticosteroid therapy | journal=Dermatology Reports | publisher=PAGEPress Publications | volume=3 | issue=3 | date=2011-11-25 | issn=2036-7406 | pmid=25386300 | pmc=4211510 | doi=10.4081/dr.2011.e48 | page=48}}{{citation | last1=Solhjoo | first1=M | last2=Ho | first2=CH | last3=Chauhan | first3=K | title=Drug-Induced Lupus Erythematosus | chapter=article-24529 | publisher=StatPearls Publishing | location=Treasure Island (FL) | year=2019 | pmid=28722919 | url=http://www.ncbi.nlm.nih.gov/books/NBK441889/ | access-date=2019-12-18 }}

The term "lichenoid" derives from a resemblance to a lichen.