Morbihan disease in an Asian patient: diagnostic and therapeutic challenges.

Dear Editor, Morbihan disease (MD) is a rare condition affecting mainly middle-aged Caucasian adults, characterized by persistent swelling of the upper face. First described in 1956, it was named by Gorin et al. in 1991 after a French patient from the Morbihan region. The etiology remains unclear and is likely multifactorial, involving lymphatic drainage impairment and chronic vascular inflammation, supporting its association with rosacea. Histological findings parallel those of rosacea, characterized by perivascular and inflammatory infiltrates, dermal edema, and sebaceous gland hyperplasia. Diagnosis relies on clinical features and ruling out other conditions that look similar. [...].