Squamous Cell Carcinoma



  • Primary cause of all skin cancers: Over 90% of skin cancers occur on areas of {the} skin that are regularly exposed to sunlight or other ultraviolet radiation.
  • Other risks
    • predisposition (skin cancers are more common in those who have light colored skin, blue or green eyes, and blond or red hair
    • chemical pollution
    • overexposure to X-rays or other forms of radiation
  • Squamous cell carcinoma occurs in {the} elderly, especially fair-skinned individuals.
  • It has {the} potential form distant or regional metastasis.
  • The incidence of Squamous cell carcinoma is thought to be on {the} rise in {the} general population
  • In 1990, 600,000 Americans were diagnosed with either basal cell cancer or squamous cell cancer, up from 400,000 in 1980.
  • These tumors are malignant

Location and Symptoms

It is most common along {the} lower eyelid margin. It occurs more frequently than basal cell in {the} upper lid and outer canthus. It represents only 5% of lid epithelial tumors.


Growth or Bump

  • Size: small
  • Texture: firm, surface scaly or crusted
  • Color: reddened
  • Shape: flat or nodu



  • Treatment consists of wide local excision.
  • Microscopic shaving (Mohs' surgery) might possibly remove small tumors.
  • Skin grafts might possibly be needed if wide areas of skin are removed


Malignant: Malignancy is {the} tendency of a cancer or tumor either to invade {the} surrounding tissues, to destroy or replace {the} tissues previously present or to metastasize (spread to other parts of {the} body)

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