Cancer pathology

thumb|Squamous cell carcinoma occluding [[bronchus with metastasis to adjacent lymph node]]

transition where an epithelial cell becomes a migratory mesenchymal cell

in the blood

measure of the cell appearance in tumors and other neoplasms

DNA released from tumor cells that is found circulating in body fluids

thumb|Marked atypia of type 2 pneumocytes is a characteristic finding in association with treatment with [[busulfan and other chemotherapeutic agents. ]] Atypia (from Greek, a + typos, without type; a condition of being irregular or nonstandard) is a histopathologic term for a structural abnormality in a cell, i.e. it is used to describe atypical cells.