Fungal Association in Seborrheic Dermatitis

Pathophysiology and Fungal Association

Seborrheic dermatitis involves Malassezia species, which metabolize sebum triglycerides, producing irritating free fatty acids that trigger inflammation, particularly in areas with high sebaceous gland density 1

In seborrheic blepharitis, 95% of patients also have seborrheic dermatitis elsewhere on the body, showing the systemic nature of the fungal condition 2

Seborrheic dermatitis is more pronounced in patients with certain conditions, such as HIV infection, Parkinson's disease, and Down syndrome, and frequently co-occurs with dry eye conditions in 25-40% of cases 1
Patients with seborrheic blepharitis frequently have coexisting rosacea or seborrheic dermatitis 2
Low-potency topical corticosteroids may be used short-term alongside antifungal agents to control inflammation and itching 1
Due to the chronic, relapsing nature of seborrheic dermatitis, maintenance therapy with antifungals is often necessary 1