Erythrodermic psoriasis (EP) is a severe and disabling form of psoriasis that is often challenging to treat; it incurs serious morbidity and can even lead to mortality. EP can result from aggravation of a previous case of psoriasis or can appear as the initial presentation of psoriasis. Drugs such as methotrexate, cyclosporine, and oral retinoid are effective for treating EP; however, numerous factors limit their use, including organ-specific toxicity, inconvenience, and the risk of opportunistic infections. Targeted biological therapies have the advantages of high selectivity for targeting specific pathways involved in the inflammation cascade and have improved the safety profiles of several inflammatory arthropathies and psoriasis1.

Golimumab (GLM) (Simponi; Janssen Korea Ltd.), a human γ-1 immunoglobulin-κ anti-tumor necrosis factor-α (TNF-α) monoclonal antibody, was approved by the US Food and Drug Administration and the European Agency for the Evaluation of Medicinal Products for adults for the treatment of active rheumatoid arthritis, active psoriatic arthritis, and active ankylosing spondylitis. GLM 50 mg is administered as a monthly subcutaneous injection2.

Here, we report the first case of the treatment of EP with GLM without any increase in dosage, demonstrating its efficacy for controlling and preventing the occurrence of erythrodermic flares with satisfactory compliance.

A 32-year-old man with a 17-year history of moderateto-severe plaque psoriasis was referred to our clinic in April 2013 for a flare-up of a skin lesion. On physical examination, the involved body surface area was approximately 90% with a Psoriasis Area and Severity Index (PASI) score of 40.8 (Fig. 1). The patient had joint tenderness and swelling on both hips, the right thumb, and the left fourth toe; his Classification Criteria for Psoriatic Arthritis score was 5. Therefore, he was diagnosed with EP and active psoriatic arthritis. The skin lesion responded poorly to previous conventional treatments including methotrexate, cyclosporine, acitretin, narrow-band ultraviolet B phototherapy, and topical agents (i.e., steroids and calcipotriol). Because of the severity of the clinical features and intolerance to conventional systemic therapies, he was considered to have a high need for biologics. Accordingly, the patient was administered GLM 50 mg subcutaneously once per month. Dramatic improvements were observed: just 4 weeks after the first injection of GLM, his PASI score decreased to 16.8 (Fig. 1). Gradual improvements were observed thereafter: his PASI scores were 12.2 and 7.5 after the second (week 8) and third (week 12) injections, respectively. Subjective symptoms including itching and burning sensations also disappeared. Moreover, dramatic improvements were observed in arthritis: the numbers of tender and swollen joints decreased from 7 to 2 and 5 to 0, respectively. The patient has been undergoing monthly GLM treatments for 11 months and has maintained a reduced PASI score. No significant adverse events have been observed throughout the course of treatment.

EP is a rare subtype of psoriasis characterized by generalized erythema of the entire body with scaling. Furthermore, it is associated with significant mortality345. In fact, 2 previous studies report mortality rates of 15% and 9% (with 5% and 2% mortality rates attributable to psoriasis) even though the patients had been treated with conventional systemic treatments such as retinoid and methotrexate35.

Unfortunately, the management of EP is difficult and has not been well standardized. Traditional systemic therapies include methotrexate, cyclosporine, and oral retinoid. However, treatment failure or intolerance to these therapeutic agents is frequently observed. Therefore, alternative strategies are urgently required4. Biologics including TNF-α inhibitors (e.g., etanercept, infliximab, and adalimumab) and the anti-interleukin-12/23 p40 monoclonal antibody ustekinumab have recently been used to treat patients with EP (Table 1)1678910111213. The results of a multicenter retrospective study of patients in whom conventional systemic treatments failed supports the short-term efficacy of biologics for treating EP, with a high rate of patients reaching a PASI score of 75 or a body surface area improvement of approximately 50% for various TNF-α inhibitors by the 12-week endpoint12.

The rationale for administering an anti-TNF-α agent to treat EP is based on the importance of TNF-α in inducing and maintaining skin inflammation during psoriasis. TNF-α is overexpressed in psoriatic skin lesions and is known to promote the proinflammatory cytokine cascade, which leads to the recruitment of leukocytes to the lesional epidermis. Furthermore, TNF-α is distributed throughout the epidermis of lesional psoriatic skin and localized to the upper dermal blood vessels14. Skin inflammation is the predominant feature of EP, and rapid systemic release of TNF-α may be responsible for the disease onset and severity. As GLM was recently demonstrated to exhibit sustained efficacy against multiple facets of psoriatic arthritis including enthesitis and dactylitis, we selected it among 5 biologics (etanercept, adalimumab, infliximab, ustekinumab, and GLM) currently available for the treatment of psoriatic arthritis in Korea15.

GLM is a human γ-1 immunoglobulin-κ anti-TNF-α monoclonal antibody39. The amino acid sequence of the heavy and light variable chain regions (Fab) of GLM are virtually identical to those of the human sequence (heavy chain sequence, 98%; light chain sequence, 100%). The constant (Fc) regions of the heavy and light chains of GLM are identical to those of infliximab with respect to amino acid sequence16. GLM is administered as a single-dose prefilled syringe or a single-dose prefilled autoinjector containing 50 mg GLM in 0.5 ml solution for subcutaneous administration.

To our knowledge, there are no published reports of EP treated with GLM. Thus, the present case is the first to demonstrate GLM is highly effective for EP and induces a rapid and significant clinical response associated with an excellent safety profile. Our patient's global assessment and compliance were consistently good. Although further studies are required to clarify the long-term profile of GLM for this indication, the rapidity of clearance and excellent safety profile of GLM suggest it can play a role in the management of EP.