<prompt> The feature that differentiate a follicular carcinoma from a follicular adenoma of thyroid isNuclear pleomorphismHuhle cell changeCapsular invasionAbsence of colloid  <response>: Follicular adenomas and carcinomas both are composed of well - differentiated follicular epithelial cells;the latter are distinguished by evidence of capsular andor vascular invasion. They both have fairly uniform cells forming small follicles containing colloid. So there is no reliable cytological difference between them. ref:ROBBINS Text book of pathology REf img : 