fibroblast CALOHA:TS-0362 FMA:63877 VHOG:0001482 These cells may be vimentin-positive, fibronectin-positive, fsp1-positive, MMP-1-positive, collagen I-positive, collagen III-positive, and alpha-SMA-negative. NCIT:C12482 A connective tissue cell which secretes an extracellular matrix rich in collagen and other macromolecules. Flattened and irregular in outline with branching processes; appear fusiform or spindle-shaped. ZFA:0009026 BTO:0000452 stromal cell Homo sapiens