Some common dermatologic techniques used to test for diseases are biopsies, including punch, shave, and excision biopsy; microbiological culture (often called a skin culture); skin allergy patch testing. The results from these tests can be used to either confirm or rule out a diagnosis, such as skin cancer or a fungal skin infection.
Other dermatologic procedures are used to remove or treat benign or cancerous skin lesions. Cryotherapy, cyst excision, phototherapy, and skin tag removal are examples of the types of methods physicians use to destruct, remove, or treat skin for a wide variety of diseases and conditions.
Many common dermatologic procedures are done as office procedures to test for a wide variety of diseases or to treat often minor dermatologic diseases or conditions in a quick and noninvasive manner.