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According to Bosniak classification, where would you place the lesion?
In view of multiple enhancing septations and enhancing mural nodules, it would be considered Bosniak 3 lesion.
What are the treatment options in this case?
Partial nephrectomy or RF ablation would be possible options.
What percentage of these kind of lesions actually result as malignant?
This lesion being much larger in size, although classically placed in Bosniak 3 category, chances of malignancy is much higher. Close to 50% of Bosniak 3 category lesions, in general, are malignant.
Multicystic right renal mass with irregular,thick, enhancing septae.