ACTA1 and neoplasm: An expression of α-SMA that reflects activation and myogenic differentiation of stromal fibroblasts (Oda et al, 1990; Rønnov-Jessen et al, 1995; Rønnov-Jessen and Petersen, 1996) was also detected in most of tumour and normal stromal cultures and was the highest in the pancreas-derived stromal cells.