A variant of lichen nitidus triggered by sun exposure, with tiny, shiny papules in sun-exposed areas.
A variant of lichen planus in sun-exposed areas, often presenting as annular plaques with a hyperpigmented center.
Presents as classic violaceous, flat-topped papules that have arranged themselves into a ring-like shape, often with central clearing.
An HPV-induced condition with multiple reddish-brown or violaceous papules on the genitalia that are histologically a form of squamous cell carcinoma in situ.
A rare variant where tense bullae arise directly on pre-existing violaceous, flat-topped papules and plaques of lichen planus.
A self-limited childhood rash, often post-viral, with monomorphic, flat-topped, pink-brown papules symmetrically on the face, buttocks, and extremities.
The chronic form often presents as a widespread eruption of violaceous papules and plaques that are clinically and histologically indistinguishable from lichen planus.
Presents as extremely itchy, thick, hyperkeratotic, violaceous plaques and nodules, most commonly on the shins.
A rare condition with violaceous, lichenoid papules arranged in a distinctive linear or reticular pattern.
A form of primary cutaneous amyloidosis with intensely pruritic, hyperkeratotic papules that coalesce into thickened, brownish, rippled plaques on the shins.
Presents as an eruption of myriad, tiny (pinpoint-sized), shiny, flat-topped, skin-colored papules, often on the trunk, genitals, and arms.
The classic prototype, characterized by pruritic, purple, polygonal, planar papules and plaques, often with fine white lines (Wickham's striae).
A rare condition where tense bullae arise not only on lichen planus lesions but also on normal-appearing skin.
A localized, well-demarcated, thickened (lichenified) plaque with exaggerated skin markings, caused by chronic rubbing, not a primary papular eruption.
A variant of actinic keratosis that is clinically inflamed and erythematous, and histologically shows a dense lichenoid infiltrate.
An eruption that clinically mimics lichen planus but is often more widespread, more eczematous, and appears weeks to months after starting a new medication.
Lichen planus papules that are arranged in a linear configuration, often following a scratch (Koebner phenomenon) or Blaschko's lines.
Can present as crops of small, reddish-brown or violaceous, translucent-appearing papules, often on the face, which are granulomatous, not truly lichenoid.
Verruca plana (flat warts) are multiple, small, skin-colored or pink, flat-topped papules, but are caused by HPV and lack lichenoid features.
