Renal mass. No fat. CT or MRI without and with contrast. Cystic. Bosniak IIF.

For how long has the mass demonstrated no morphologic change?

Newly discovered or less than 5 years.        

More than 5 years.

There is morphologic change.

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Notes:
Growth of a cystic mass without morphologic change is not indicative of malignancy.

Morphologic change includes increasing number of septa, thickening of wall or septa, or development of a solid component.