Psoriasis Features in Patients with Inflammatory Bowel Disease

Area of Science:

• Immunodermatology
• Gastroenterology
• Autoimmune Diseases

Background:

• Psoriasis and Inflammatory Bowel Diseases (IBD) share common immune dysregulation pathways, including tumor necrosis factor-α and Th17 cells.
• Genetic factors contribute to the shared pathogenesis of psoriasis and IBD.
• Previous research indicates a higher prevalence of psoriasis in IBD patients, but detailed clinical features are not well-documented.

Purpose of the Study:

• To conduct an observational study assessing the clinical characteristics and severity of psoriasis in patients diagnosed with IBD.
• To investigate the prevalence and specific features of psoriasis among a cohort of Crohn's disease (CD) and ulcerative colitis (UC) patients.

Main Methods:

• A consecutive series of 200 IBD patients (123 with CD, 77 with UC) underwent dermatological assessment.
• Data collection occurred between 2015 and 2016 at the IBD Care Centre of Gastroenterology, University of Naples Federico II.
• Psoriasis assessment included medical history, dermatologic examination, and Psoriasis Area and Severity Index (PASI) scoring.

Main Results:

• 18 out of 200 IBD patients (9%) were diagnosed with psoriasis.
• Psoriasis prevalence was similar between Crohn's disease (11 patients, 61.2%) and ulcerative colitis (7 patients, 38.2%).
• The mean Psoriasis Area and Severity Index (PASI) score among affected patients was 3.7.

Conclusions:

• Psoriasis and IBD share underlying immune mechanisms and often require immunosuppressive therapies.
• The findings suggest potential for improved treatment outcomes by considering the co-occurrence of psoriasis and IBD.
• Further research into the management of patients with both conditions is warranted.