A case that cannot be assigned an appropriate DRG because of an atypical situation is called a(n):

A ________ involves inserting a catheter into the urinary tract through the bladder into the ureters

a. cholecystogram b. hysterectomy c. retrograde pyelography d. barium enema

Localized tumors that are generally slow growing and resemble normal cells are known as:

A. malignant tumors B. benign tumors C. atypical tumors D. differentiated tumors