Some MRI features of renal masses beyond size and growth rates can also be used to determine tumor aggressiveness and risk of metastatic potential [87]. This may be particularly useful for the characterization of small renal masses that have indeterminate findings on CT and US or when biopsy of these masses is not feasible or is inconclusive. Active surveillance guidelines include MRI and CT as appropriate imaging modalities for the initial evaluation of growth patterns and for subsequent follow-up [2,9,11]. For patients in whom contrast is contraindicated (eg, previous anaphylactic reaction), MRI of the abdomen without IV contrast may be considered appropriate. Post-treatment Follow-up of Renal Cell Carcinoma MRI Abdomen and Pelvis MRI of the abdomen without and with IV contrast is an accurate method for the detection and characterization of small localized renal masses. Different sequences, including T2-weighted, chemical shift T1-weighted, contrast- enhanced T1-weighted, and diffusion-weighted images, can help distinguish RCC from other benign and malignant lesions and distinguish the clear-cell subtype from other subtypes of RCC. Some MRI features of renal masses beyond size and growth rates can also be used to determine tumor aggressiveness and risk of metastatic potential [87]. This may be particularly useful for the characterization of small renal masses that have indeterminate findings on CT and US or when biopsy of these masses is not feasible or is inconclusive. Active surveillance guidelines include MRI and CT as appropriate imaging modalities for the initial evaluation of growth patterns and for subsequent follow-up [2,9,11]. For patients in whom contrast is contraindicated (eg, previous anaphylactic reaction), MRI of the abdomen without IV contrast may be considered appropriate.
Post Treatment Follow up and Active Surveillance of Renal Cell Carcinoma. Some MRI features of renal masses beyond size and growth rates can also be used to determine tumor aggressiveness and risk of metastatic potential [87]. This may be particularly useful for the characterization of small renal masses that have indeterminate findings on CT and US or when biopsy of these masses is not feasible or is inconclusive. Active surveillance guidelines include MRI and CT as appropriate imaging modalities for the initial evaluation of growth patterns and for subsequent follow-up [2,9,11]. For patients in whom contrast is contraindicated (eg, previous anaphylactic reaction), MRI of the abdomen without IV contrast may be considered appropriate. Post-treatment Follow-up of Renal Cell Carcinoma MRI Abdomen and Pelvis MRI of the abdomen without and with IV contrast is an accurate method for the detection and characterization of small localized renal masses. Different sequences, including T2-weighted, chemical shift T1-weighted, contrast- enhanced T1-weighted, and diffusion-weighted images, can help distinguish RCC from other benign and malignant lesions and distinguish the clear-cell subtype from other subtypes of RCC. Some MRI features of renal masses beyond size and growth rates can also be used to determine tumor aggressiveness and risk of metastatic potential [87]. This may be particularly useful for the characterization of small renal masses that have indeterminate findings on CT and US or when biopsy of these masses is not feasible or is inconclusive. Active surveillance guidelines include MRI and CT as appropriate imaging modalities for the initial evaluation of growth patterns and for subsequent follow-up [2,9,11]. For patients in whom contrast is contraindicated (eg, previous anaphylactic reaction), MRI of the abdomen without IV contrast may be considered appropriate.