How does cancer spread in the human body?

Correct option is D

Sol. Cancer spreads from its original site through metastasis, commonly via the lymphatic system or the bloodstream. Cancer cells break away from the tumor, travel through these systems, and form secondary tumors in other organs. This is a key characteristic of malignant tumors, making them life-threatening and hard to treat.
Explanation of each option:
· (a) Through lymphatic system – Cancer cells can enter lymph vessels and spread to lymph nodes, which is often the first step in metastasis. However, this is not the only route.
· (b) Through blood stream – Hematogenous spread occurs when cancer cells invade blood vessels, especially in cancers like liver, lungs, or bone. Still, it’s not the sole method.
· (c) Skin – Cancer doesn’t spread through skin. However, skin cancer like melanoma can metastasize internally via lymph and blood.
· (d) Both lymphatic system and Through blood stream – Correct Answer. Most malignant tumors spread via both routes, depending on the cancer type, stage, and tissue involved. This dual pathway increases the risk of metastasis to distant organs like lungs, brain, and bones.