Hey there, future biologists! 🎉 Get ready to dive into the world of tumours, cell division, and the mitotic index. These aren't just biology buzzwords; they're vital for understanding how our cells behave in health and disease. So let's jump in!

• Primary Tumour: The original group of tumour cells. Think of it like the OG gang of rowdy cells. 🎸
• Benign Tumour: Stays in one place; it's not cancerous and usually doesn't harm you. Like that stray cat that hangs around your yard but doesn't do anything bad. 🐱
• Malignant Tumour: These tumours are the bad guys; they spread to other parts of the body. Imagine a villain in a movie who starts recruiting minions everywhere! 🦹‍♂️
• Metastasis: The process of malignant tumours spreading to other places. If the villain sets up villain-lairs in other cities, that's metastasis. 🏴‍☠️
• Secondary Tumours: New tumours formed from the cells that have spread. Like villain-lairs in other towns. 🌍

Suppose you're building a sandcastle on the beach (your body). A benign tumour is like a harmless bucket of sand that stays put, not really causing problems. A malignant tumour is like that wave that crashes and spreads sand everywhere, making a mess (i.e., invading other areas). 🏖️

• Hormonal Stimulation: Places like breasts, ovaries, testes, and thyroid gland are more likely to develop malignant tumours.
• Think of these tissues as the popular spots in a city where everyone wants to set up shop, making them crowded and sometimes chaotic.

Imagine hormonal stimulation as social media ads for a new viral trend. Where there's more buzz (hormones), there's more action (cell division), and more chances for things to go haywire (malignant tumours).