Benign Neoplasms of Skin

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Some of the Skin disorders are not dangerous, they are called as benign skin neoplasms.

Some of the Benign Neoplasms of Skin are:

  • Callus
  • Keloid
  • Keratosis
  • Leukoplakia
  • Nevus

Callus evolution.


What is Callus?

Callus is the increased growth of cells in the horny layer of the epidermis due to pressure or friction.

Common Sites of Callus formation:

The feet and the hands are common sites. A corn is a type of callus that develops as a hard core.

English: Keloid formed after operation. One ye...

Keloid formed after operation. One year since surgery.


What is meant by keloid?

Keloid is hypertrophied , thickened scar formed after trauma or surgical incision.

Why do Keloids occur?

Keloids occur from excessive collagen formation in the coriumduring connective tissue repair.


What is Keratosis?

English: Seborrheic keratosis in 55-year-old w...

Seborrheic keratosis

Keratosis is the thickened area of the epidermis.

How and Why do Keratosis Occur? Types of Keratoses

Some keratosis are red and are due to excessive exposure to light.

Seborrheic Keratoses:

Seborrheic keratoses are yellow or brown and are also called senile warts. Both these types of keratoses occur in middle age and old age.


What is meant by Leukoplakia?

English: Toxic leukoplakia of the oral mucosa ...

Leukoplakia are white, thickened patches on mucous membrane tissue of the tongue or cheek.

This is a precancerous lesion.

Who are affected by Leukoplakia?

Leukoplakia is common in smokers and may be caused by chronic infalmmation.


What are Nevus?

Nevus are pigmented lesions of the skin.

English: Nevus anemicus on the left leg of a man.

Nevus anemicus on the left leg of a man.

What does nevus include and when are they formed?

Nevus include dilated blood vessels radiating out from a point of hemangiomas, and moles.

Many nevus are present at birthbut some are acquired.

Dysplastic nevi are moles that do not form properly and may progress to form a type of skin called melanoma.

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