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Predictive factors for erythema nodosum and pyoderma gangrenosum in inflammatory bowel disease.

BACKGROUND AND AIM: To identify predictive factors related to the development of erythema nodosum and pyoderma gangrenosum, in patients with inflammatory bowel disease (IBD).

METHODS: Epidemiological and clinical data from 270 patients with Crohn's disease (CD) and 125 patients with ulcerative colitis (UC) were collected between 2003 and 2011. The variables retrospectively analyzed were: gender, age at diagnosis, type of IBD (CD or UC), smoking habit, pattern of disease (IBD), location and extension, family history, previous IBD-related surgery, other extraintestinal manifestations (EIMs), and previous biological and immunosuppressive therapy.

RESULTS: Thirty-seven patients showed at least one cutaneous manifestation. These lesions were more frequent in women (15.4%) than in men (4.2%; P = 0.0001) and in CD (12.2%) than in UC patients (3.2%; P = 0.005). These manifestations were more frequently associated with other EIMs (25% vs 7.2%; P = 0.0001), and they were less frequent in patients who received a previous biological therapy for IBD (6.8% vs 11.2%; P = 0.1). Patients with skin manifestations were younger at diagnosis of IBD than those patients without them (26.3 ± 10 vs 32.9 ± 14.5, P = 0.008). Independent variables significantly associated with development of skin manifestations were: female (P = 0.008), previous biological therapy (P = 0.007), age at diagnosis (young, P = 0.026), type of IBD (CD, P = 0.043) and presence of other EIMs (P = 0.0001).

CONCLUSION: Predictive factors involved in the development of main cutaneous manifestations are: female, CD, young age at diagnosis of IBD, and presence of other EIMs. Early use of biological therapies prevents the development of cutaneous manifestations.

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