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inverted follicular keratosis

Friday 6 July 2012

PO

Images

- Inverted follicular keratosis

Synopsis

- Patterns :

  • verrucous pattern : wart-like variant
  • crateriform pattern , crateriform pattern : keratoacanthoma-like pattern
  • solid nodular pattern / compact pattern

- well circumscribed endophytic growth of squamous cells with lobular extension into the dermis
- exophytic lesions with a keratoacanthoma-like appearance
- variable number of squamous eddies
- may be increased secondary to irritation
- possible peripheral basaloid cells with occasional mitotic activfty

Digital cases

- JRC:10550 : Inverted follicular keratosis.
- JRC:10551 : Inverted follicular keratosis.
- JRC:10552 : Inverted follicular keratosis.

Differential diagnosis

- seborrheic keratosis
- squamous cell carcinoma
- tricholemmoma

See also

-  cutaneous anomalies
- keratoses / keratotic anomalies