Unusual palatal presentation of oral psoriasis.

Oral lesions of psoriasis are rare clinical observations. Report on oral psoriasis that are well documented show no consistent lesion pattern. The oral lesions range in type from red plaques to white plaques to ulcers. In this report, an unusual palatal presentation of oral psoriasis with red serpiginous concentric arcs is described. The diagnosis of intraoral psoriasis is supported by clinical and microscopic findings.