Skin biopsy involves removal of a skin sample for examination under a microscope. The procedure is done under local anaesthetic. Three main types of skin biopsies are:
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).
A doctor uses a circular tool to remove a small section of skin including deeper layers (epidermis, dermis and superficial fat).
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.