Definition: An abnormal growth; differential diagnosis includes abscess, metaplasia, and neoplasia.

Alright class, settle down, let’s take a look, At this word “tumor,” it’s quite a nook! The dictionary gives us the gist, you see, “An abnormal growth – for you and me!” Now, "abnormal" means something's not quite right, A change in cells, a different light. It’s growing too fast, or maybe it’s slow, And doesn’t behave like things we know. The dictionary adds some words to consider, Let’s break them down, a helpful order: “Abscess,” “metaplasia,” and “neoplasia” too – These are all things doctors must pursue! An abscess is like a pocket of goo, Filled with pus, a troublesome view. Metaplasia changes how cells reside, Like one type transforming, side by side. Neoplasia , this one’s a bit grand, Means “new growth,” unplanned and unplanned! A tumor isn't always bad, you see, It could be benign, happy and free! But sometimes it’s cancerous, causing fright, So doctors investigate with all their might. Now let's think about this carefully, my dears, Don't just memorize, conquer your fears! Understanding the meaning is key, To grasping concepts for you and me! Does anyone have any questions to share?