[Bullous phototoxic contact dermatitis caused by Ruta graveolens L. (garden rue), Rutaceae. Case report and review of literature].

A patient developed severe bullous phototoxic contact dermatitis caused by Ruta graveolens L. (garden rue) which belongs to the Rutaceae family. To date only a few cases of phototoxic reactions to the garden rue have been reported. The phototoxic components of Ruta graveolens L. are the fouranocoumarins 5-methoxypsoralen (bergapten) and 8-methoxypsoralen (xanthotoxine), and the furanoquinoline dictamnine whose phototoxic properties were recently discovered. Since the garden rue is frequently cultivated, it should be considered in the differential diagnosis of phototoxic phytodermatitis.