cell by histology mesenchymal cell A connective tissue cell that normally gives rise to other cells that are organized as three-dimensional masses. This cell type is CD73-positive, CD90-positive, CD105-positive, CD45-negative, CD34-negative, and MHCII-negative. They may further differentiate into osteoblasts, adipocytes, myocytes, neurons, or chondroblasts in vitro. Originally described as residing in the bone marrow, this cell type is now known to reside in many, if not all, adult organs. BMSC CFU-F CL:0000134 CL:0002452 MSC Stem Cells, Mesenchymal bone marrow stromal cells cell colony-forming unit-fibroblast marrow stromal cells mesenchymal precursor cell mesenchymal progenitor cells mesenchymal stem cell mesenchymal stromal cell mesenchymal stromal cells