Skin - Nonmelanocytic tumors
Other tumors of skin
Keloid

Author: Christopher Hale, M.D. (see Authors page)

Revised: 5 October 2016, last major update September 2012

Copyright: (c) 2003-2016, PathologyOutlines.com, Inc.

PubMed search: Keloid [title] skin

Cite this page: Keloid. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/skintumornonmelanocytickeloid.html. Accessed August 17th, 2017.
Definition / general
  • Abnormal fibroblast reaction to injury
  • Usually in people of African descent, often in earlobe
  • High rate of recurrence after excision
Treatment
  • Corticosteroid injection
Clinical images
Images hosted on PathOut server:

Breast skin, courtesy of Dr. Mark R. Wick

Microscopic (histologic) description
  • Wide bands of collagen with large, brightly eosinophilic, glassy fibers
  • Also parallel fibroblasts and myofibroblasts
  • Mucinous pools after steroid injection
Microscopic (histologic) images
Images hosted on PathOut server:

Courtesy of Dr. Mark R. Wick

Molecular / cytogenetics description
Differential diagnosis
  • Complication of acne
  • Hyperplastic scar
  • Keloidal dermatofibroma