What follow-up is recommended for small solid renal masses?

"Computed tomography or MRI at 3 to 6 months, 12 months, and then yearly; the interval of observation may be varied (eg, shorter intervals if the mass is enlarging); the duration of observation may be individualized. Observation may be considered for a solid renal mass of any size in a patient with a limited life expectancy or comorbidities that increase the risk of treatment, particularly when the mass is small."

"In general, large (>3cm) solid renal masses are likely malignant; similarly, the smaller a solid mass, the more likely it is benign. In addition, a small renal cell carcinoma is more likely to be low grade and indolent behaving than a larger one.Therefore we have suggested that solid masses <1cm be observed."

Managing Incidental Findings on Abdominal CT: White Paper of the ACR Incidental Findings Committee
Berland LL et al.
J Am Coll Radiol 2010;7;754-773

"The goal of imaging when an incidental adrenal mass is discovered is to differentiate a benign “leave alone� mass (eg.nonhyperfunctioning tumor,myelolipoma,hemorrhage,cyst) from a mass that warrants treatment (eg, metastases, pheochromocytoma,adrenal cortical carcinoma)."

Managing Incidental Findings on Abdominal CT: White Paper of the ACR Incidental Findings Committee
Berland LL et al.
J Am Coll Radiol 2010;7;754-773

"This white paper which represents the collective experience of the Incidental Findings Committee, using a less formal process of repeated reviews and revisions of the draft document, does not represent official ACR policy. For these reasons, this white paper should not be used to establish the legal standard of care in any particular situation."

Managing Incidental Findings on Abdominal CT: White Paper of the ACR Incidental Findings Committee
Berland LL et al.
J Am Coll Radiol 2010;7;754-773

"The committee has used a consensus method based on repeated reviews and revisions of this document and a collective review and interpretation of relevant literature. This white paper provides guidance devloped by this committee for addressing incidental findings in the kidneys, liver , adrenal gland and pancreas."

Managing Incidental Findings on Abdominal CT: White Paper of the ACR Incidental Findings Committee
Berland LL et al.
J Am Coll Radiol 2010;7;754-773