There is no distinct color.

Certain tumors have color which depends upon the presence of a dark brown or black pigment within the cells.
Haemorrhages within them are not infrequent, and they may be colored by the blood or by pigments formed from it.

Usually they have a gray color modified by their varying vascularity, or the cut surface may be mottled due to areas of cell degeneration.

The consistency varies; some tumors are so soft that they can be pressed through a sieve, others are of stony hardness.

There is no distinct shape, this being influenced by the nature of the tumor, the manner of growth and situation.