The earliest ideas about neoplastic evolution come from Boveri who proposed that tumors originated in chromosomal abnormalities passed on to daughter cells.

If the tumors originated from the same clone, then they are likely to have common genetic changes and behave in a similar manner.

Rarely, some other types of cancer and potentially cancerous tumors that more usually originate elsewhere can originate in the kidneys.

The cell type from which these tumours originate remains unknown.

Uveal tumors can originate from melanocytes residing within the iris.

Instead, the tumors had originated sporadically and thus were not known to be deficient in BRCA1, as those with hereditary cases are.

In the majority of cases, the tumor originated in the breast, lung, kidney, colon, or prostate.

The usual tumor in the adult presents as a solitary tumor, originating in the nerve.

Stromal tumors originate in the cells that produce female hormones.

IDC can remain localized, which means it stays near the site where the tumor originated.