As an example, this was based on our previous research where we showed that MCP‐1 is only secreted at very low levels by epidermal keratinocytes but was secreted in high levels by monocytes.[21] This study aimed to determine whether (systemic) immunological differences exist between patients who develop HS and those who develop normotrophic scars (NS) and to assess whether those differences can be used to identify patients prone to developing HS. Here, CCL2 is linked to histiocytic sarcoma.