Many brain tumors are due to metastasis

Yes. Many brain tumors are due to metastasis.

Metastasis is the term used for cancer that spreads or travels to a different part of the body from its primary site (location where it started). Many brain tumors are due to metastasis.

Cancers that originally started from lung, breast, melanoma (skin), colon and kidney commonly spread to the brain.

The answer is Truly, Many cerebrum tumors are because of metastasis.  

Explanation:

Metastasis is the term utilized for malignant growth that spreads or goes to an alternate piece of the body from its essential site area where it began. Many cerebrum tumors are because of metastasis.  Malignancies that initially began from lung, bosom, melanoma skin, colon and kidney commonly spread to the brain.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.