Primarily used for the detection of infectious, metabolic skin abnormalities ( porphyrias ), and pigmentation disorders. In relation to infectious diseases , erythrasma is characterized by the emission of a bright red-orange fluorescence while scalp ringworm and pseudomonas infection emit a green fluorescence. Regarding pigmentation disorders, it allows to distinguish between hypopigmentation and depigmentation that occurs in alterations such as vitiligo . In this case, the fluorescence is white. Skin biopsy a skin biopsy involves removing a small sample of skin for later analysis under a microscope.
They are used for the detection of infectious skin abnormalities, disorders such as psoriasis and skin cancer. There are different types of skin biopsies: in punch: it consists of the extraction of a small skin sample of round shape. For its extraction, a hollow circular scalpel is used that is turned clockwise and counterclockwise to cut about 4mm thick and e commerce photo editing service reach the layer of fatty tissue located below the dermis. Shaved: in this type of biopsy, a thin layer of affected skin is removed using a blade or other sharp tool. As a result, a small sinking can be observed in the area, but stitches are not usually necessary. By excision: it consists of the extraction of a complete area or nodule of abnormal skin.
After this procedure, stitches are usually necessary. As a general rule, local anesthesia will be applied to patients before performing a skin biopsy. Patch test this test is done to check if a certain substance is causing allergic contact dermatitis . With this procedure , late allergies can be detected , that is, those that take several days to develop. To carry out this test, different allergens are applied in small quantities, on the patches that are placed on the skin. Some of the contact dermatitis-causing substances to which patients are exposed include latex, medications, hair dyes, metals, and resins.