Medical wording: rolls (?) of red blood cells

[Guest guest]

Dear Colleagues,

My text, translated literally from Hebrew, reads

a microscopic urinalysis shows no evidence of rolls of (crenated? In Hebrew,

it's glilim) red blood cells.

I'm not at all sure what this 'rolls' is meant to be in English. Googling Hebrew

medical documents gave me only 1 other instance of the use of 'rolls' in this

context.

Perhaps I could just leave it out? But, of course, I have to be sure I'm not

missing something

I'd appreciate your input,