Isogenous groupAn isogenous group is a cluster of up to eight chondrocytes found in hyaline and elastic cartilage.FormationChondrocytes develop in the embryo from mesenchymal progenitor cells through a process known as chondrogenesis. A chondrocyte can then undergo mitosis to form an isogenous group within its lacuna.FunctionIsogenous groups differentiate into individual chondrocytes where they continue to produce and deposit extracellular matrix, lengthening the cartilage and increasing its diameter. This is termed interstitial growth and is one of only two ways cartilage can grow.