sentences:  Eggs have a thick shell, and the surface appears to be pitted except at the poles.The only means of obtaining a definitive diagnosis is through the identification of "D. renale" eggs in a patient's urine.However, obtaining patient history (i.e., if the patient has consumed undercooked or raw freshwater fish) is an important first step that can be coupled with radiological exams to search for enlarged or calcified kidneys.