ERBB2 and neoplasm: Paszek et al. measured the unconfined compressive modulus of normal and cancerous breast tissue of MMTV-Her2/neu, Myc, and Ras transgenic mice and reported an average modulus of 170±30 Pa for the normal tissue, 920±270 Pa for the stroma attached to the tumor tissue, and 4050±940 Pa for the tumor tissue [11].