A new eruption of bullous pemphigoid within psoriatic plaques following cyclosporine withdrawal

Successful Treatment of Psoriasis Combined with Bullous Pemphigoid with Dupilumab: A Case Report

Psoriasis is an immune-mediated chronic inflammatory disease that can be combined with complications such as diabetes, cardiovascular disease, obesity, and kidney disease. The comorbidity of psoriasis with autoimmune bullous diseases (AIBD) has been reported previously in several cases, the most frequent of which is bullous pemphigoid (BP). The underlying mechanisms of psoriasis with BP are not clear and there are no uniform treatment criteria. Based on previous case reports, the coexistence of psoriasis and BP may be related to inflammatory activity, medications, phototherapy, and infection. We report a case of a psoriasis patient who developed BP after taking Chinese herbal compounds and was successfully treated with dupilumab, which is the first reported case of applying dupilumab to treat psoriasis with BP comorbidities.

The Intriguing Links between Psoriasis and Bullous Pemphigoid

The coexistence of psoriasis with autoimmune bullous diseases (AIBDs), particularly bullous pemphigoid (BP), has been documented in case reports and series, as well as in epidemiological studies. The onset of psoriasis precedes that of BP in the majority of cases. Patients with concomitant BP and psoriasis are generally younger at the onset of BP and present with fewer erosions and blisters as compared with patients suffering from isolated BP. Intriguingly, it has been speculated that some BP cases with comorbid psoriasis can actually correspond to anti-laminin gamma-1 pemphigoid, a rare form that was recently recognized as a distinct entity and which can mimic BP and/or other subepidermal AIBDs. The pathomechanisms underlying the BP-psoriasis association have not yet been identified, although several hypotheses have been proposed. The most credited among such hypotheses involves the so-called "epitope spreading" phenomenon, with tissue injury secondary to a primary inflammatory process (i.e., psoriasis) leading to the exposure of sequestered antigens evoking a secondary autoimmune disease (i.e., bullous pemphigoid). This narrative review aims to give a brief overview of the association between psoriasis and BP, examining epidemiological, clinical, and immunopathological features, the pathomechanisms underlying this association, the treatments for psoriasis incriminated as potential triggers of BP, and the therapeutic management of patients with psoriasis and BP.

Concurrent bullous pemphigoid and plaque psoriasis successfully treated with Janus kinase inhibitor Baricitinib

We report a case of aggressive bullous pemphigoid (BP) concurrent with plaque psoriasis successfully treated with Janus kinase inhibitor Baricitinib. The 83-year-old Chinese man suffered ten years of psoriasis and developed bullous pemphigoid with typical intense blisters and significantly elevated serum anti-BP180 autoantibodies. Due to concerns on his poor health conditions including stage III hypertension and potential serious side effects of standard treatment with systematic steroid, he was given Baricitinib orally 4mg/day. Significant improvement in skin lesions and pruritus was noted following treatment for 12falseweeks, from which the dose of Baricitinib was halved and continued for an additional 12falseweeks. He showed a complete remission of both bullous and psoriatic lesions without any adverse effects at the 24-week follow-up visit. Our observation suggests a potential of Baricitinib as a new alternative therapeutic option for concurrent plaque psoriasis and bullous pemphigoid or either of them. This article is protected by copyright. All rights reserved.