has result metastasis tumor cell proliferation [Ground glass appearance] metastasis [Ground glass appearance] ISBN:0071769234 The spread or migration of cancer cells from one part of the body (the organ in which it first appeared) to another. The secondary tumor contains cells that are like those in the original (primary) tumor. [def-source: NCI] This entity is a specific course-dependent process. This process can constitute the course of Ground glass appearance. ground glass degeneration dependent process