Lab test interpretation

Stool Microscopy: Round Elements in Lugol's Prep

A diagnostic challenge in stool microscopy: round elements were found in a Lugol's solution preparation from an elderly patient. What could they be?

Anonymous question from a subscriber. Stool, Lugol’s preparation, elderly patient, occult blood - negative. Interested in the round elements with inclusions inside, what could they be? They are absent in other preparations (native and methylene blue).