Lichenoid keratosis

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Lichenoid keratosis is a benign skin condition.

It is also known as lichen planus-like keratosis.

General

Clinical DDx:[1]

Microscopic

Features:[2]

  • Hyperkeratosis.
  • Parakeratosis.
  • Band of inflammatory cells at DE junction (lichenoid inflammation).
  • Dead keratinocytes (Civatte bodies).
  • Dermal melanophages.

DDx:

Images:

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SKIN LESION, MID-MIDDLE BACK, PUNCH BIOPSY:
- LICHENOID KERATOSIS.

Incompletely excised

SKIN LESION, LEFT CHEST, PUNCH BIOPSY:
- LICHENOID KERATOSIS VERSUS ACTINIC KERATOSIS.
- NEGATIVE FOR BASAL CELL CARCINOMA.
- SEE COMMENT.

COMMENT:
No eosinophils are apparent. No melanocytic lesion is identified; however, excision of the
whole lesion to exclude a partially regressed melanocytic lesion is suggested.

See also

References

  1. 1.0 1.1 Busam, Klaus J. (2009). Dermatopathology: A Volume in the Foundations in Diagnostic Pathology Series (1st ed.). Saunders. pp. 346. ISBN 978-0443066542.
  2. Busam, Klaus J. (2009). Dermatopathology: A Volume in the Foundations in Diagnostic Pathology Series (1st ed.). Saunders. pp. 347. ISBN 978-0443066542.