Transformation from pityriasis rubra pilaris to erythema gyratum repens–like eruption without associated malignancy: A report of 2 cases

Erythema gyratum repens (EGR), considered one of the most specific cutaneous paraneoplastic phenomena, is characterized by a serpiginous morphology and a migrating scaly border. EGR is associated with malignancy, most commonly bronchial, esophageal, and breast, in more than 80% of cases.1,2 Here we report 2 cases of patients with pityriasis rubra pilaris (PRP), whose eruption transformed to an EGR-like eruption without any evidence of malignancy.