Keratosis lichenoides chronica
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Synopsis
The disease affects both sexes about equally. A majority of the patients in the literature are of Northern European descent, although patients of other ethnicities have also been reported. The mean time to diagnosis of KLC is 9 years given its rarity and similarities to other keratotic skin diseases. While it is a progressive condition, improvement has been reported with aging or in the summer.
KLC is rarely seen in children, where it presents with differing clinical features than in adults. Possible autosomal recessive inheritance has been proposed in these patients.
Codes
ICD10CM:L82.1 – Other seborrheic keratosis
SNOMEDCT:
373601005 – Keratosis lichenoides chronica
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Differential Diagnosis & Pitfalls
- Lichen planus
- Lichenoid drug eruption
- Lichenoid graft-versus-host disease
- Inflammatory linear verrucous epidermal nevus (ILVEN)
- Mycosis fungoides – More lesions observed on the thighs and buttocks. Reticulate pattern is formed by pigmentation. In KLC, papules themselves form the reticular pattern.
- Seborrheic dermatitis – KLC spares the nasolabial folds in most cases.
- Malar rash of systemic lupus erythematosus
- Discoid lupus erythematosus
- Rosacea
- Erythromelanosis colli et facei
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Last Reviewed:06/14/2017
Last Updated:07/16/2017
Last Updated:07/16/2017
Keratosis lichenoides chronica