Skin Cancer Squamous Cell Carcinoma Keratoacanthoma Variant | Dermatology Education Skin Cancer Squamous Cell Carcinoma Keratoacanthoma Variant Video
September 19, 2019

Dermnet Videos

Nonmelanoma skin cancers Videos

  • Actinic keratosis
  • Basal cell carcinoma (BCC)
  • Bowen’s disease
  • Cutaneous T-cell lymphoma (CTCL)
  • Extramammary pagets
  • Metastatic disease
  • Paget’s disease breast
  • Squamous cell carcinoma
  • Skin Cancer Squamous Cell Carcinoma Keratoacanthoma Variant

    Keratoacanthomas appear suddenly and grow rapidly. They reach a certain size, usually 0.5 cm to 2.0 cm, stop growing, and then regress weeks to months later. They begin as red-to-flesh colored, dome-shaped papules with a smooth surface and a central crater filled with a keratinous plug. The pathologist sometimes has difficulty differentiating a keratoacanthoma from SCC.

    While keratoacanthomas have been regarded in the past as self-limited, regressing lesions that resemble squamous cell carcinoma, most dermatologists today would classify them as squamous cell carcinoma variants. They should be treated as other forms of squamous cell carcinoma.