MRC1 and neoplasm: In addition to pro‐fibrotic cells native to organs, other cell types, such as tumor‐associated macrophages (TAMs), also significantly contribute to fibrosis.[35, 36] By re‐clustering myeloid cells, we identified five TAM subtypes (Figure S4a,b, Supporting Information): TAM MKI67+ (proliferative), TAM APOE+, TAM CXCL1+, TAM MRC1+, and TAM VEGFA+.