What is a characteristic appearance of a butterfly rash?

The characteristic appearance of a butterfly rash is a facial rash resembling a butterfly. This type of rash is typically associated with systemic lupus erythematosus (SLE), an autoimmune condition. The butterfly rash predominantly spans across the cheeks and bridge of the nose, creating a shape that looks like the wings of a butterfly. It often appears reddish and may be flat or slightly raised.

The significance of the butterfly rash in the context of systemic lupus erythematosus lies in its role as a classic dermatological manifestation of the disease, commonly serving as a marker for diagnosis. Recognition of this rash is essential in clinical practice, as it directs attention towards further evaluation for SLE in patients presenting with this feature, along with other systemic symptoms.