Inverted Follicular Keratosis



Inverted Follicular Keratosis


Senait W. Dyson, MD

David Cassarino, MD, PhD










Inverted follicular keratosis (IFK) is a well-circumscribed, endophytic epithelial proliferation. This tumor shows multiple connections to the epidermis image, and multiple folliculocystic structures (similar to milia) are present image.






High magnification of the center of this lesion shows bland squamoid cells surrounding small follicular lumina and smaller, peripheral, more basaloid-appearing cells image.


TERMINOLOGY


Abbreviations



  • Inverted follicular keratosis (IFK)


Synonyms



  • Irritated seborrheic keratosis variant


Definitions



  • Benign tumor of follicular infundibulum considered by many to be identical to irritated seborrheic keratosis


ETIOLOGY/PATHOGENESIS


Etiology

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