Prevalence and association of psoriasis with seborrhoeic dermatitis: a systematic review and meta-analysis

Clinical reports describing seborrhoeic dermatitis presenting with comorbid psoriasis (i.e. 'sebopsoriasis') are common; however, the prevalence and association of psoriasis with seborrhoeic dermatitis has not been well characterized. We conducted a systematic review and meta-analysis to examine the prevalence of coexistent psoriasis in patients with seborrhoeic dermatitis. We found the overall rate of psoriasis in patients with seborrhoeic dermatitis is detectable but low and without clear association. This is in contrast to common dermatology teaching and patient education, suggesting a need for further investigation into the clinical burden of seborrhoeic dermatitis.