Ichenoid Keratosis



Ichenoid Keratosis


Cary Chisholm, MD










Biopsy-proven lichenoid keratosis presented as a keratotic, light pink, 1 cm plaque on the breast of this female patient.






Lichenoid keratosis is characterized by a single lesion with a lichenoid lymphocytic infiltrate.


TERMINOLOGY


Synonyms



  • Benign lichenoid keratosis (BLK), lichen planus-like keratosis (LPLK), involuting lichenoid plaque, solitary lichen planus


Definitions



  • Keratosis with a lichenoid band of inflammation


ETIOLOGY/PATHOGENESIS


Reactive Condition



  • Preexisting lesion usually present



    • e.g., solar lentigo or seborrheic keratosis


  • Sensitization to lesion occurs


  • Body mounts immune response to attack lesion


  • Biopsy occurs after immune-mediated destruction has started



    • Original lesion may or may not be discernible


CLINICAL ISSUES


Epidemiology



  • Age



    • Middle-aged and older adults


  • Gender



    • More common in females


Site



  • Upper extremities and trunk

Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Ichenoid Keratosis
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