Filling defects in the renal pelvis and ureter owing to bleeding secondary to acquired circulating anticoagulants.

A case of transient filling defects in the renal pelves and ureters, secondary to spontaneously occurring acquired anticoagulants, is presented. The relationship of this entity to hemophilia, immunologic disorders, such as systemic lupus erythematosis, and normal post partum patients is discussed. The differential diagnosis for filling defects in the renal pelvis is reviewed.