Keratosis lichenoid actinic L57.0

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 14.02.2023

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benign lichenoid keratosis; lichenoid actinic keratosis; lichenoid keratosis; lichen-planus-like actinic keratosis; Lichen planus solitaire; lichen-planus type keratosis; LPLAK; solitary lichen planus

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Variant of keratosis actinica: Occurring in sun-exposed areas, usually solitary, hyperkeratotic, reddish-brownish, macroscopically uncharacteristic flat papule with the histologic aspects of interface dermatitis.

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Mainly occurring in older women.

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S.a. Keratosis actinica. Pronounced interface dermatits. In addition, the phenomena of actinic keratosis with disordered epithelial structure, focal parakeratosis, and polymorphous keratinocytes are found on light-damaged skin.

Differential diagnosis
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  2. Dalton SR et al (2003) Atypical junctional melanocytic proliferations in benign lichenoid keratosis. Hum Pathol 34: 706-709
  3. Elgart GW et al (2001) Seborrheic keratoses, solar lentigines, and lichenoid keratoses. Dermatoscopic features and correlation to histology and clinical signs. Dermatol Clin 19: 347-357
  4. Inui S et al (2000) A case of lichen planus-like keratosis: deposition of IgM in the basement membrane zone. J Dermatol 27: 615-617
  5. Jang KA et al (2000) Lichenoid keratosis: a clinicopathologic study of 17 patients. J Am Acad Dermatol 43: 511-516
  6. Schepis C et al (2003) The papulokeratotic type of solitary benign lichenoid keratosis. Int J Dermatol 42: 722-723
  7. Shapiro L et al (1966) Solitary lichen planus-like keratosis. Dermatologica 132: 386-392
  8. Wolff H et al (1982) Lichenoid keratosis. dermatologist 33: 651-653


Please ask your physician for a reliable diagnosis. This website is only meant as a reference.


Last updated on: 14.02.2023