Zoology - Human Health and Diseases Question with Solution | TestHub

Malignant tumour first grows slowly. No symptoms are noticed. This stage is called the latent stage. The tumour later grows quickly. The cancer cells go beyond adjacent tissue and enter the blood and lymph. Once this happens, they migrate to many other sites in the body, where the cancer cells continue to divide. It is metastasis. Only malignant tumours are properly designated as cancer.