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Showing posts from July 31, 2011

Skin Neoplasms Benign Neoplasms -- Lesson 255

In this post we would learn some of the Skin neoplasms Benign neoplasms 1. Callus: - Increased growth of cells in the layer of horny of the epidermis dueto pressure or friction. The common sites are the feet and the hands. The type of callus that develops a hard core which   is a whitish, corn-like central kernel is called a corn. 2. Keloid: - Hypertrophied, thickened scar after trauma or surgical incision. These occur from excessive collagen formation in the corium during connective tissue repair. Here kelis means a blemish which comes from the Greek word. 3. Keratosis: - Area of the epidermis which is thickened. Due to excessive exposure to light or actinic keratosis, some keratosis appear red. Seborrhcic keratoses look yellow or brown and are also called senile warts. These both types occur in middle age and old age. 4. Leukoplakia: - On mucous membrane tissue of the tongue or cheek, there appears white, thickened patches. This is a precancerous lesion. This may ...