Below, a short summary of the most prominent markers is provided. CSC markers that could have potential usefulness within therapeutic, diagnostic, and prognostic approaches are pointed out (compare Tables 1–7) and focus on most deadliest tumors of lung, liver, breast, stomach, and colorectal as well as AML and CML. Tables 1–7 provide an extensive list of markers expressed in CSCs. A comparison shows that several markers are expressed in several tumor types.