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

12. Sarcoidosis-Related Nasal Infiltration

Sarcoidosis can manifest with distinctive nasal involvement characterized by granulomatous infiltration that creates a characteristic violaceous, infiltrated appearance often described as "lupus pernio." This manifestation typically affects the nasal alae, tip, and sometimes the entire external nose, creating a dusky, purple discoloration that may be accompanied by nodular thickening and surface changes. The pathophysiology involves the formation of non-caseating granulomas composed of epithelioid cells, giant cells, and lymphocytes that infiltrate the dermis and subcutaneous tissue. Unlike other forms of cutaneous sarcoidosis that may resolve spontaneously, nasal involvement often indicates chronic, progressive disease that may be associated with pulmonary fibrosis and other serious systemic complications. The granulomatous infiltration can lead to destruction of normal tissue architecture, resulting in permanent disfigurement if left untreated. Diagnosis requires histopathological confirmation showing characteristic non-caseating granulomas, along with appropriate clinical correlation and exclusion of other granulomatous conditions. Treatment typically involves systemic corticosteroids or other immunosuppressive agents, though response may be slow and incomplete. The presence of nasal sarcoidosis often indicates a more severe form of the disease that may require aggressive treatment and long-term monitoring for systemic complications. Understanding the implications of nasal involvement in sarcoidosis is crucial for appropriate patient counseling and