51. Lepidic adenocarcinoma: Difference between revisions

This histology slide shows a “lepidic” growth pattern, which is the pattern where the tumor cells ''line'' the alveolar walls instead of invading the interstitium. The alveolar structure is therefore maintained. It’s technically an adenocarcinoma ''in situ'' because it hasn’t passed the basement membrane yet. Like other lung adenocarcinoma it's associated with mutations in EGFR, KRAS, ALK, PDL-1.[[File:Lepidic adenocarcinoma lung pleomorphism.png|thumb|Check out the pleomorphism of the tumor cells (anisochromasia, anisocytosis, anisonucleosis). Note that the tumor cells have large, pale cytoplasm. They belong to an ''adeno''carcinoma after all!|left]][[File:Lepidic adenocarcinoma lung lepidic growth pattern.png|thumb|The lepidic growth pattern. See how the cancer cell create a lining of the walls of the alveoli.]]