Lichen scrofulosorum

{{Infobox medical condition (new)

| name = Lichen scrofulosorum

| synonyms = Tuberculosis cutis lichenoides

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Lichen scrofulosorum is a rare tuberculid that presents as a lichenoid eruption of minute papules in children and adolescents with tuberculosis. The lesions are usually asymptomatic, closely grouped, skin-colored to reddish-brown papules, often perifollicular and are mainly found on the abdomen, chest, back, and proximal parts of the limbs. The eruption is usually associated with a strongly positive tuberculin reaction.{{Cite book |title=Rook's textbook of dermatology. 7th ed. |publisher=Oxford: Blackwell Science |year=2004 |pages=28.1–28.39}}

Of the three tuberculids, the incidence of lichen scrofulosorum was found to be the lowest (2%) in a large study conducted in Hong Kong. This highlights its rarity and significance as an important marker of undetected tuberculosis.{{Cite journal |last=Chong |first=Lai‐Yin |last2=Lo |first2=Kuen‐Kong |year=1995 |title=CUTANEOUS TUBERCULOSIS IN HONG KONG: A 10‐YEAR RETROSPECTIVE STUDY |url=https://onlinelibrary.wiley.com/doi/10.1111/j.1365-4362.1995.tb04372.x |journal=International Journal of Dermatology |language=en |location=Int J Dermatol |volume=34 |issue=1 |pages=26–29 |doi=10.1111/j.1365-4362.1995.tb04372.x |issn=0011-9059}}