Green nail syndrome caused by proteus mirabilis in an immunocompromised patient

Green nail syndrome (GNS) is distinguished by greenish discoloration of the nail plate, which Pseudomonas aeruginosa is known as the causative etiology. The occurrence of GNS with no P. aeruginosa evidence might be more frequent than has been reported. It can be effectively treated with the same approach used to manage P. aeruginosa-positive cases. We present a case of GNS due to Proteus mirabilis infection in an immunocompromised patient.