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Bullous Sweet's syndrome in rheumatoid arthritis after streptococcal pharyngitis

Carolina Teles and Richard Stratton
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DOI: https://doi.org/10.7861/clinmed.2022-0529
Clin Med March 2023
Carolina Teles
ACentro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
Roles: internal medicine trainee
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  • For correspondence: carolina.m.teles@outlook.com
Richard Stratton
BRoyal Free Hospital, London, UK
Roles: consultant rheumatologist
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KEYWORDS:
  • bullous Sweet's syndrome
  • rheumatoid arthritis
  • streptococcal pharyngitis
  • organising pneumonia

Case presentation

A 35-year-old woman presented with a 2-week history of a painful rash, characterised by multiple well-circumscribed circular bullous lesions, with a purulent or haemorrhagic fluid, some ulcerated or leaking, affecting first hands, forearms and mouth, but rapidly spreading through her entire body surface (Fig 1a–c). This was accompanied by malaise, fever and diffuse joint pain and swelling, and was preceded by a sore throat. She had seronegative rheumatoid arthritis, previously treated with sulfasalazine, which she had recently voluntarily stopped. Blood testing showed elevation of erythrocyte sedimentation rate (60 mm/h) and C-reactive protein (205 mg/L), and a positive antistreptolysin O. Skin biopsy revealed a neutrophilic dermatitis with oedematous bulla formation, consistent, in this clinical setting, with bullous Sweet's syndrome (SS). Chest computed tomography (CT) was performed, excluding malignancy but showing a ‘crazy-paving’ pattern consistent with organising pneumonia (Fig 1d). The patient started methylprednisolone and rituximab with full resolution of the bullous rash, polyarthritis and lung involvement.

Fig. 1.
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Fig. 1.

Bullous Sweet's syndrome with skin and lung involvement. (a) Bullous lesions on the dorsal aspect of the left hand. (b) Bullous lesions on the oral mucosa. (c) Bullous lesions on the shoulder and scapular area. (d) Chest CT showing a ‘crazy-paving’ pattern consistent with organising pneumonia.

Discussion

Bullous SS is a rare variant of the classical SS, or acute febrile neutrophilic dermatosis.1 The bullous variant is most frequently described in the context malignancy, certain drugs and inflammatory bowel disease, and is rarely seen in rheumatoid arthritis.2 This patient's currently untreated rheumatoid arthritis could have provided the clinical predisposition for this severe form of bullous SS after only a mild streptococcal pharyngitis. Furthermore, organising pneumonia is an uncommon and probably under-recognised but potentially life-threatening association with SS,3 which, in this case, fully responded to treatment with steroids and rituximab. These images remind physicians of the variable presentations and severity of SS while at the same time raising awareness for the possible triggers and underlying predisposing conditions.

  • © Royal College of Physicians 2023. All rights reserved.

References

  1. ↵
    1. Joshi TP
    , Friske AK, Hsiou DA, Duvic M. New practical aspects of Sweet syndrome. Am J Clin Dermatol 2022:23:301–18.
    OpenUrl
  2. ↵
    1. Giannoni M
    , Rizzetto G, Sapigni C, et al. Bullous Sweet's syndrome in a patient with ulcerative colitis: A rare case report. Acta Dermatovenerologica Alp Pannonica Adriat 2020;29:153–5.
    OpenUrl
  3. ↵
    1. Fernandez-Bussy S
    , Labarca G, Cabello F, et al. Sweet's syndrome with pulmonary involvement: Case report and literature review. Respir Med Case Rep 2012;6:16–9.
    OpenUrl
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Bullous Sweet's syndrome in rheumatoid arthritis after streptococcal pharyngitis
Carolina Teles, Richard Stratton
Clinical Medicine Mar 2023, 23 (2) 177-178; DOI: 10.7861/clinmed.2022-0529

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Bullous Sweet's syndrome in rheumatoid arthritis after streptococcal pharyngitis
Carolina Teles, Richard Stratton
Clinical Medicine Mar 2023, 23 (2) 177-178; DOI: 10.7861/clinmed.2022-0529
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