A rosacea-like eruption induced by Tigason (Ro 10-9359) treatment.

A 67-year-old male patient, with a history of palmar psoriasis for 8 years, developed a rosacea-like eruption during Tigason (Ro-10-9359) treatment. Strict relationship between Tigason intake and skin symptoms was proved by double introduction of the drug and the patient's previous history. This retinoid side effect is very unusual and we are unable to give any explanation for it.