Cancer or cancers

I think cancer in that sense is noncount, so it should be cancer.

Even with count nouns, "types of" should be followed by the singular:

several types of computer
several types of monkey

Hi GPY. I wasn't aware of such a rule, so I looked it up on a dictionary and saw thesee examples:

We studied various types of trees.

She likes all types of books.

Is it because of all and various?

NugsoHi GPY. I wasn't aware of such a rule, so I looked it up on a dictionary and saw thesee examples:We studied various types of trees.She likes all types of books.Is it because of all and various?

I perhaps should have added "in my opinion" to my last message. Yes, it is easy to find numerous examples of "types of + plural noun", even from apparently authori

GPY. I do not like "We studied various types of trees".

It seems fine to me. COCA has over 8,000 citations for types of + plural noun, including 23 for types of trees.

fivejedjonIt seems fine to me.

How do you feel about "I have two types of computers"?

GPY How do you feel about "I have two types of computers"?

It seems OK to me.

fivejedjon GPY How do you feel about "I have two types of computers"?It seems OK to me.

What about: there are several types of cancers; there are several types of cancer.

Are both possible and mean the same?

AnonymousWhat about: there are several types of cancers; there are several types of cancer.

They are both OK. COCA has 165 citations for 'types of cancer' and 40 for 'types of cancers'. There appears to be no difference in meaning.

AnonymousWhat about: there are several types of cancers; there are several types of cancer.Are both possible and mean the same?

To me, "several types of cancers" sounds much inferior to "several types of cancer". I do not see any difference in meaning.