A skin biopsy removes cells

A skin biopsy removes cells or skin samples from the surface of your body. The sample taken from a skin biopsy is examined to provide information about your medical condition. A doctor uses a skin biopsy to diagnose or rule out certain skin conditions and diseases.

Three Main Types of Skin Biopsies.
Shave biopsy.
A doctor uses a tool similar to a razor to remove a small section of the top layers of skin (epidermis and a portion of the dermis).
Punch biopsy.
A doctor uses a circular tool to remove a small section of skin including deeper layers (epidermis, dermis and superficial fat).
Excisional biopsy.
A doctor uses a small knife (scalpel) to remove an entire lump or an area of abnormal skin, including a portion of normal skin down to or through the fatty layer of skin.