Giant cellulitis-like Sweet syndrome mimicking cellulitis: a case report

Abstract

Background: Sweet syndrome (acute febrile neutrophilic dermatosis) is an uncommon inflammatory disorder characterized by the abrupt appearance of painful, edematous, and erythematous papules, plaques, or nodules on the skin. There are various subtypes, such as classical, drug-induced, malignancy-associated, and the less common variant giant cellulitis-like Sweet syndrome. This case is unique due to its presentation of the giant cellulitis-like variant of Sweet syndrome in a patient from Ethiopia. The unusual distribution of the skin lesions and the initial lack of response to antibiotics make this case particularly noteworthy. It underscores the importance of considering Sweet syndrome in differential diagnoses when faced with atypical skin manifestations and ineffective antibiotic treatment. This contribution adds valuable insights to the scientific literature by highlighting the need for heightened awareness of this rare variant and improving diagnostic accuracy in similar clinical scenarios.

Case presentation: A 60-year-old Ethiopian male patient who presented to the accident and emergency department with a 5-day history of fever, chills, sweating, and rigor accompanied by a reddish skin color change around the anterolateral region of the right chest wall. On physical examination, there were erythematous, indurated tender plaques with ill-defined borders over the right antero- and posterolateral chest wall with extension to the lateral part of the right neck and medial aspect of the right arm. Subsequently, the patient was started on antibiotics, but there was a suboptimal response. Skin biopsy revealed features suggestive of giant cellulitis-like Sweet syndrome. He was then started on steroids, which significantly improved his symptoms.

Conclusion: A cautious stance is essential when identifying Sweet syndrome in individuals displaying erythematous plaque-like skin lesions in atypical areas of the body with uneven distribution. Such presentation may signal Sweet syndrome rather than a common infection. If conventional treatments, such as antibiotics, fail to resolve symptoms, consider Sweet syndrome as a potential diagnosis. This approach ensures timely and appropriate treatment, preventing treatment delay and misdiagnosis.

Keywords: Cellulitis; Giant-cellulitis-like Sweet syndrome; Sweet syndrome.

Fig. 1

Erythematous, tender plaque with ill-defined borders involving the A right side of the chest, B right medial aspect of arm, C right lateral trunk, D right flank and thigh

Fig. 2

A–D Neutrophils and leukocytoclastic debris of neutrophils mixed with lymphocytes and few eosinophils as well as plasma cells in the absence of signs of vasculitis, the infiltrates have also extended to the subcutaneous fat