interpretation and validity of small populations of cells

Hi,

I was wondering if anyone had any information as to how to interpret low
numbers of cells of interest.

Is there a general cut off and number of cells that is generally
accepted?  I have heard that it is okay

to go down to 0.05  as long as 50 cells are counted.  But I wanted to be
sure about this.

Thanks very much

Rick Schlichtemeier

Research assistant

Univ of Colorado Health Sciences Center