15 Nose and Nasal Skin Changes Associated With Rosacea and Autoimmune Conditions

4. Lupus-Associated Malar Rash Extension

The classic malar rash of systemic lupus erythematosus often extends to involve the nasal bridge and dorsum, creating a distinctive butterfly pattern that serves as one of the most recognizable signs of this autoimmune condition. This photosensitive eruption typically spares the nasolabial folds, a key distinguishing feature that helps differentiate it from other facial rashes. The pathophysiology involves immune complex deposition in dermal blood vessels, leading to complement activation and subsequent inflammatory cascade that manifests as erythema, edema, and sometimes scaling. The nasal involvement in lupus can range from mild erythema to more severe manifestations including bullae, ulceration, or permanent scarring in cases of discoid lupus. The photosensitive nature of this rash means that sun exposure can trigger or worsen the condition, making sun protection a crucial component of management. Histopathological examination reveals interface dermatitis with basal cell vacuolization, dermal mucin deposition, and perivascular lymphocytic infiltration. The presence of nasal involvement in the malar rash often correlates with systemic disease activity and may serve as a marker for monitoring treatment response. Early recognition and appropriate treatment with sun protection, topical corticosteroids, and systemic immunosuppressive therapy when indicated can help prevent permanent scarring and disfigurement.