Under common regular conditions, COL11A1 / (pro) Col11A1 is not expressed in head, neck, breast, lung, stomach, uterus, pancreas, and large intestine stromal cells and it is present in almost all the benign pathologic processes such as chest hyperplasia, pulmonary adenosis(53), IPF, cirrhosis(54), diverticulitis, and inflammatory diseases(55). The gene discussed is COL11A1; the disease is diverticulitis.