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Skin-nontumor
Other dermatoses
Lichen nitidus
Reviewer: Mowafak Hamodat MB.CH.B, MSc., FRCPC, Eastern Health, St. Johns (Canada) (see Reviewers
page)
Revised: 1 August 2011, last major update August 2011
Copyright: (c) 2002-2011, PathologyOutlines.com, Inc.
Definition
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● Children with asymptomatic, pinpoint, round, flesh-colored papules on trunk, genitalia, abdomen and forearms
● May co-exist with lichen planus
Clinical images
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Tiny papules
Micro description
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● Epidermis has parakeratosis and atrophy; clawlike pattern of curvilinear, fingerlike extensions and surrounding papillary dermal lymphocytic and histiocytic infiltrate
● Occasionally multinicleate giant cells and parakeratosis; variable dyskeratotic keratinocytes at dermoepidermal junction; minimal lichenoid change
Differential diagnosis
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● Lichen planus: has orthohyperkeratosis and acanthosis with sawtooth pattern; positive direct immunofluorescence
Additional references
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End of Skin-nontumor > Other dermatoses > Lichen nitidus
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