Dermoscopy three-point checklist explained

Under magnification and suitable lighting, the clinician considers whether a spot is asymmetrical, contains several concerning colours, or shows structures that do not form a familiar pattern. The checklist is a structured aid, not a diagnosis on its own. A harmless mole can have an unusual feature, and a concerning spot may need assessment beyond a quick checklist.

The examiner also considers the spot's history, body location, age of the person, and whether nearby or earlier images show change. Dermoscopy can reveal details that are difficult to see with the naked eye.

The clinician examines the spot and may apply a clear contact layer before viewing it through a handheld or digital dermatoscope. The process is generally non-invasive. Images may be recorded so the same area can be compared later. Depending on the overall assessment, the next step may be monitoring, a closer review, or a procedure to remove and examine the tissue.

Before an appointment, note when you first noticed the spot and any changes in size, shape, colour, surface, bleeding, or sensation. Bring earlier photographs if you have them.

Book a skin assessment for a mole that is changing, newly different from your other spots, persistently itchy, crusted, bleeding, or not healing. Seek prompt review for a rapidly changing lesion or one with several new colours. Do not wait for a checklist result before asking about a visible change.

Ask which checklist features were present, how the whole lesion changes the interpretation, and whether comparison images are useful. Confirm the recommended review interval, what change should trigger an earlier visit, and whether removal or tissue examination is being considered.