Journal of Research in Medical Sciences1735-199512220070611Mucocutaneous candidiasis or psoriasis? A case report9699ENShahnazArminZahraChavoshzadehAbdollahKarimiProfessor of Pediatric Infectious Diseases, Pediatric Infectious Research Center, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.. dr_a_karimi@yahoo.comAramTajeddiniParvizToosi200609252007020620070206BACKGROUND: Pustular psoriasis is a rare form of psoriasis in childhood. The prevalence of psoriasis in various parts of the world varies from 0.1% to 3% and the most frequently observed variant is the plaque type, followed by the guttate psoriasis.CASE REPORT: A 4-year-old boy with a history of repeated self-limited arthritis, onycholysis, recurrent erythematous skin, diaper rash, fever and pustular lesions, had several hospital admissions with no benefits. After a 2-year delay in the diagnosis, he was treated as a case of pustular psoriasis which was shown by skin biopsy.KEY WORDS: Pustular psoriasis, arthritis, children.