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Of the seven patients in this subset, six had further injections and only one relapsed, although less severely, and two patients presented with different cutaneous reactions following the next injection. Only two patients had a classical Sweet syndrome histology showing a diffuse dermal neutrophilic infiltrate, while two had a dermal infiltrate of histiocyte-like immature myeloid cells compatible with histiocytoid Sweet syndrome (Figure 1c, d). Sweet-like syndrome and multiple COVID arm syndrome following COVID-19 vaccines: "specific" patterns in a series of 192 patients. [Extracted from the article]