ACTA1 and neoplasm: On the basis on the selective expression of markers of pericytes (αSMA, CD146) and coverage of a collagen-IV+ basement (38), blood vessels were distinguished into functioning and stabilized (CD31+, CD34+, Collagen-IV+, CD146+, αSMA+, cadherin-11+) from non-stabilized (CD31+, CD34+, collagen-IV-, CD146-) tumor neo-angiogenesis, as well as in CD31+ podoplanin+ lymphatic vessels (Figure 1H).