Fast and slow-growing cancers

A cancer may be slow- or fast-growing
The rate of growth depends on the tissue in which it occurs and also on the inherent character of the type of cancer
Rapidly growing cancers are those which send metastasis in other organs, are much more dangerous
Sometimes the primary cancer in the first stage of development grows slowly, as for example, that of the stomach and remains unnoticed, while the secondaries spread rapidly in the liver, abdominal lymph glands, etc. These secondary cancers are first noticed