<unk>  (from Greek, roughly: "bad form") is a term used in pathology to refer to an abnormality in maturation of cells within a tissue. This generally consists of an expansion of immature cells, with a corresponding decrease in the number and location of mature cells.<unk>  is often indicative of an early neoplastic process. The term<unk>  is typically used when the cellular abnormality is restricted to the originating tissue, as in the case of an early, in-situ neoplasm. For example, epithelial<unk>  of the cervix (cervical intraepithelial neoplasia - a disorder commonly detected by an abnormal pap smear) consists of an increased population of immature (basal-like) cells which are restricted to the mucosal surface, and have not invaded through the basement membrane to the deeper soft tissues. Myelodysplastic syndromes, or<unk>  of blood-forming cells, show increased numbers of immature cells in the bone marrow, and a decrease in mature, functional cells in the blood.<unk> , in which cell maturation and differentiation are delayed, can be contrasted with metaplasia, in which cells of one mature, differentiated type are replaced by cells of another mature, differentiated type.
Dysplasia
Hyperplasia
Anaplasia
Atrophy
Metaplasia
Hypoplasia
Degranulation
Adhesion 