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Acrodermatitis Continua of Hallopeau Evolving into Generalized Pustular Psoriasis Following COVID‐19: A Case Report of a Successful Treatment with Infliximab in Combination with Acitretin

Authors Samotij D, Gawron E, Szczęch J, Ostańska E, Reich A

Received 20 January 2021

Accepted for publication 19 March 2021

Published 27 April 2021 Volume 2021:15 Pages 107—113

DOI https://doi.org/10.2147/BTT.S302164

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Professor Shein-Chung Chow

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Dominik Samotij,1 Ewelina Gawron,1 Justyna Szczęch,1 Elżbieta Ostańska,2 Adam Reich1

1Department of Dermatology, Institute of Medical Sciences, Medical College of Rzeszow University, Rzeszów, Poland; 2Department of Pathology, Institute of Medical Sciences, Medical College of Rzeszow University, Rzeszów, Poland

Correspondence: Adam Reich
Department of Dermatology, Institute of Medical Sciences, Medical College of Rzeszow University, ul. Fryderyka Szopena 2, Rzeszów, 35-055, Poland
Tel +48 605076722
Fax +48 17 8666294
Email [email protected]

Abstract: The global pandemic of coronavirus disease 2019 (COVID-19) caused by the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is emerging. Various cutaneous manifestations have been observed in patients with SARS-CoV-2 infection, yet exacerbations of psoriasis have been reported sporadically. Acrodermatitis continua of Hallopeau (ACH) is an uncommon, sterile pustular dermatosis involving one or more digits. In some rare cases, ACH may evolve into generalized pustular psoriasis (GPP), which is a severe, and potentially life-threatening, form of psoriasis that manifests itself with widespread eruptions of pustules. We describe the first case of a patient in whom ACH abruptly progressed into GPP during COVID-19. A combination of infliximab and acitretin was used allowing swift clinical improvement.

Keywords: psoriasis, pustular psoriasis, biologics, biologic therapy, SARS-CoV-2, coronavirus

Introduction

The first human case of infection by the novel coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), was reported in Wuhan, China, in late November 2019. In December 2019, several patients have been hospitalized for acute pneumonia of unknown origin.1 Shortly afterwards, SARS-CoV-2 has been found in the lower respiratory tract of hospitalized patients, and the World Health Organization (WHO) recognized the disease as Coronavirus Disease 2019 (COVID-19) on January 12, 2020. On March 11, 2020 the WHO declared the COVID-19 outbreak as pandemic.2 The most common symptoms in COVID-19 are fever, fatigue, dry cough, and dyspnoea succeeded by other symptoms, such as headache, nasal congestion, sore throat, myalgia, arthralgia, and a variety of other extrapulmonary symptoms either as the initial presentation or as sequelae.1,3,4 Initially, no skin involvement during SARS-CoV-2 infection was observed, but more recently, numerous heterogeneous cutaneous manifestations have been reported. Incidence of the skin lesions associated with SARS-CoV-2 infection varies according to the case series, ranging from 0.2% to 20.5%.5 Secondary skin reactions to different treatments for COVID-19 are also possible, as well as worsening of preexisting dermatological conditions.

In this article, we report the first case of a patient with acrodermatitis continua of Hallopeau (ACH) that progressed into generalized pustular psoriasis (GPP) during COVID-19.

Case Report

A 72-year-old woman with a 9-year history of a hard-to-treat ACH presented in our department in November 2020 with a generalized pustular eruption overlying erythematous plaques and patches of subacute onset that had appeared 2 weeks earlier. Skin lesions were accompanied by general symptoms such as high-grade fever (up to 39.2°C) and gradually increasing malaise. Four weeks before she had experienced persistent dry cough, overall fatigue, myalgia, muscle weakness, headache and fever with accompanying dysgeusia and anosmia lasting several days. At that time, reverse transcriptase polymerase chain reaction (RT-PCR) by nasopharyngeal swab testing was performed yielding positive result for SARS-CoV-2 and confirming COVID-19. Interestingly, the patient noticed that almost immediately after the first symptoms of COVID-19 had appeared, pustular lesions in the course of ACH, which at the time were present but confined to the digits and toes, started to eruptively spread to the trunk and extremities. Notably, although the patient was refractory to or intolerant of previous multiple systemic treatment modalities including methotrexate, adalimumab, acitretin, and cyclosporine A, she never showed psoriatic lesions in locations other than acral aspects of the hands and feet. With respect to the potential drug causality, therapeutic regimen for COVID-19 included a 5-day course of azithromycin and low doses of oral paracetamol. The patient had a history of paracetamol intake in the past which was never associated with exacerbation of her ACH. Of note, the last medication the patient was on prior to the GPP onset was cyclosporine A. It was however tapered gradually and stopped 6 weeks before the here described flare; therefore, it is not likely that cyclosporine A withdrawal contributed to ACH evolving into GPP. No other potentially precipitating events were identified by the patient.

On admission, the patient presented with scattered pustules on a scaly, erythematous base predominantly on the lower back and upper thighs. Several of the lesions had coalesced into crusted erythematous plaques covered with lakes of pus over extensor surfaces of elbows (Figure 1). Examination of the scalp showed confluent erythematous plaques with silvery scaling. Onycholysis of the fingers and toes was present as a result of severe subungual pustulation. No oral or ocular involvement was noted. The initial severity of the disease was classified as moderate (6 out of 10 points) using the classification proposed by Umezawa et al.6

Figure 1 Clinical presentation of the patient on admission. Scattered pustules over diffuse, symmetrical erythematous patches and plaques that arise predominantly on the lower back and upper thighs (A and B). The lesions coalesced into crusted erythematous plaques covered with larger pustules and lakes of pus over extensor surface of the left elbow (C) and inner upper left thigh (D).

Initial blood test performed during admission revealed mild neutrophilic leukocytosis with white blood cell count of 14,460/µL (reference range, 4,000– 10,000/µL), neutrophil count, 10,240/µL (reference range, 1,800 – 7,700/µL), high C-reactive protein of 18.1 mg/dL (reference range, <1.0 mg/dL), and elevated erythrocyte sedimentation rate, 28 mm/h (reference range 0–20 mm/h); elevated serum aspartate aminotransferase of 78 U/L (reference range, 14–36 U/L) and serum alanine aminotransferase of 98 U/L (reference range, <35 U/L) were also noted. Histopathological findings of lesional skin biopsy specimen were compatible with GPP and revealed intraepidermal spongiform pustule consisting of accumulated neutrophils in an acanthotic, hyperkeratotic and parakeratotic epidermis. The dermis showed a sparse perivascular mixed inflammatory infiltrate (Figure 2).

Figure 2 Histopathological findings of lesional skin biopsy showing intraepidermal spongiform pustule consisting of accumulated neutrophils in an acanthotic, hyperkeratotic and parakeratotic epidermis. The dermis showed a sparse perivascular mixed inflammatory infiltrate (x100, hematoxylin and eosin [H&E]).

The patient was initially commenced on acitretin at a dose of 50 mg daily combined with a short course of intravenous hydrocortisone, but the clinical response assessed after 7 days of treatment was unsatisfactory as new crops of pustules continued to appear. Based on the current recommendations and personal experience, infliximab was added to the regime at a dose of 5 mg/kg body weight intravenously after a negative swab result for SARS-CoV–2 had been obtained.7 The plaques and pustules, as well as the laboratory parameters, dramatically improved in the ensuing 72 hours; the GPP score improved from 6 to 2 points, which corresponded to mild severity as per the aforementioned classification.6

The patient was discharged from the hospital on acitretin 35 mg daily (0.5 mg/kg daily based on the actual body weight), with the next infusion scheduled 2 weeks after the initial one. Photographs of the patient taken on the day of the second infusion of infliximab are shown in Figure 3.

Figure 3 Clinical presentation of the patient 21 days after the initial photographs were taken. Dramatic improvement of the lesions 2 weeks after the first infusion of infliximab and 3-week treatment with acitretin (A and B).

Review of the Literature and Discussion

GPP, first described by von Zumbusch in 1910, is an infrequent and severe inflammatory dermatosis characterized by the appearance of sudden, widespread eruption of erythematous plaques covered with superficial coalescing sterile pustules and multisystem symptoms.8,9

ACH is a rare, chronic and highly recalcitrant localized pustular eruption involving the digits and nails.9–11 There has long been debated whether ACH is an independent disease or a localized form of pustular psoriasis (PP).13 ACH may rarely evolve into GPP, especially in elderly patients.14,15 Case reports describing ACH transitioning into GPP, as well as the presence of aberrant interleukin-36-receptor antagonist (IL-36Ra) in both diseases, may serve as a support for ACH probably not being a distinct entity, but a localized form of GPP.13 Co-occurrence of both forms of psoriasis has also been reported.8,14–16 GPP and ACH are currently recognized as subtypes of PP, alongside with palmoplantar pustulosis.9

Infectious diseases have long been considered as one of the triggers for autoimmune and autoinflammatory diseases, mainly via molecular mimicry.17 Viral infections have been extensively identified as potential etiological factors in GPP, including cytomegalovirus, Epstein–Barr virus, varicella zoster virus, and more recently Zika virus.18–22 Whether novel β-coronavirus SARS-CoV-2 infection can directly cause a worsening of preexisting chronic inflammatory diseases such as psoriasis remains to be determined. A possible pathomechanism for viral infection leading to GPP flare is related to stimulation of Toll-like receptor 3 (TLR3) by polyinosinic:polycytidylic acid mimicking viral RNA leading to overproduction of proinflammatory cytokine interleukin-36 gamma (IL-36-γ) and C-X-C motif chemokine ligand 8 (CXCL8) thereby dysregulating innate immune response.23,24 It has been shown that several inflammatory cytokines downstream from TLR3, including IL-36, are pathogenic in GPP.25

A wide spectrum of cutaneous associations with SARS-CoV–2 infection has been described so far, but yet exacerbations of psoriasis have been reported only a handful of times (as of December 2020).26–29 To our knowledge, there have been seven cases of psoriasis exacerbation related to COVID-19 and one case of a new-onset GPP in this setting documented to date. The first report involved a patient who developed widespread psoriatic plaques on the fourth day of treatment with oseltamivir and hydroxychloroquine.30 It was however uncertain whether the exacerbation of psoriasis was due to underlying SARS-CoV-2 infection or hydroxychloroquine treatment as antimalarials have been extensively reported to worsen the preexisting psoriasis.31 Ozaras et al described a case of plaque psoriasis flare-up in a 48-year-old woman in whom COVID-19 was treated with hydroxychloroquine, azithromycin, oseltamivir, and inhaled ipratropium and budesonide. Interestingly, psoriatic lesions in this patient regressed without any specific treatment. Similarly to the previous case, the possibility of hydroxychloroquine being the trigger medication could not have been excluded.32 Another case reported a 73-year-old man on maintenance cyclosporine A and methotrexate for psoriasis who had the medications discontinued in the setting of a SARS-CoV-2 infection prompting a psoriasis flare two weeks later followed by improvement once cyclosporine A was reinitiated.33 There is also a case report of a 38-year-old-man with a history of chronic plaque psoriasis who suffered from guttate psoriasis secondary to COVID-19, which appeared on the sixth day after the onset of fever.34 Subsequently, a 45-year-old male was reported with recurrence of severe psoriatic erythroderma and a positive test for SARS‐CoV-2, but also Staphylococcus aureus isolated from blood culture samples. Given this patient’s discontinuation of cyclosporine A 3 weeks prior, it is safe to assume that SARS‐CoV-2 was not the only contributing factor to psoriasis exacerbation.35 A recently published case report of a 62-year-old-woman with a positive family history for psoriasis differed from the aforementioned ones as the described patient developed a new-onset PP two weeks after the resolution of SARS‐CoV-2 infection symptoms.36 In November 2020, another case of PP exacerbation secondary to COVID-19 was published. The described patient was also treated with hydroxychloroquine, albeit unlike the previously reported cases, she had a history of hydroxychloroquine use without exacerbation of psoriasis; therefore, the authors concluded that SARS‐CoV-2 alone might have led to the PP flare-up.37 Lastly, the most recent case detailed a 60-year-old male with a childhood history of psoriasis who developed GPP 26 days after the initial symptoms of COVID-19 had appeared.38 Results of the literature review and the presented case are summarized in Table 1. Slightly different, yet very interesting, case was presented by Sbidian et al who collected data on onset or flare of psoriasis within 3 months following the 2009 monovalent H1N1/seasonal vaccinations in France. A patient known to suffer from GPP showed 2 successive severe GPP flares after 2 different vaccine injections, the first flare occurred 6 days after pneumococcal vaccination and the second one was observed 3 days after the 2009 monovalent H1N1 vaccine including adjuvant.39

Table 1 Summary of the Current Case and Reported Cases of Psoriasis in the Setting of COVID-19 Infection

Conclusion

In summary, COVID-19-induced hyperinflammatory state is perhaps more probable explanation of psoriasis exacerbation during the infection than a molecular mimicry, provided that iatrogenic causes are excluded (eg, hydroxychloroquine usage, rapid tapering of corticosteroids). In the light of emerging evidence, COVID-19 may be a new entity that is able to aggravate already existing psoriasis, trigger psoriasis de novo or, as it occurred in the case described herein, modify the phenotype of the disease.

Ethical Considerations

Written informed consent has been provided by the patient to have the case details and accompanying images published. No institutional approval was required to publish the case details.

Acknowledgments

The authors would like to sincerely thank our patient for her cooperation.

Disclosure

No funding was received for this manuscript. The authors declare no conflicts of interest in this work.

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