Normal human tissues look a bit like the various internal organs of a pig, but they are actually more pleasant to the eye. This is because healthy things, no matter how they grow, are definitely more pleasing to look at.
Malignant tumors are different. You know they're bad. As they grow larger, revealing their true nature, the visual differences from normal tissues become even more evident, especially when they cause extensive destruction of the body's ordinary structures, resulting in a quite disgusting scene.
