both hn1 and hn2 epitopes were found associated with mesenchymal benign or neoplastic proliferations ( e.g . connective areas of fibroadenomas , extracellular matrix of fibrosarcomas ) and with reactive connective tissue ( e.g . stroma reaction of carcinomas , ground substance of gliomas ) .
C0015350
extracellular matrix
C1253945
ground substance