What follow-up schedule and imaging protocols are recommended after a partial nephrectomy for kidney cancer?

Low-Risk Protocol (pT1a, Low Grade)

• Baseline Post-Op Visit (4–6 Weeks): Physical exam, serum creatinine, eGFR, and review of final histopathology.
• Abdominal Imaging: Baseline abdominal ultrasound or contrast-enhanced CT/MRI within 3–12 months. Alternating renal ultrasound with periodic low-dose CT or MRI is standard to minimize cumulative radiation exposure.
• Chest Imaging: Annual baseline chest X-ray for 3 years; routine chest CT is rarely necessary unless symptoms develop.
• Frequency: Annually for years 1 to 5; after 5 years, imaging can be spaced out or discontinued based on clinical judgment.

Intermediate-Risk Protocol (pT1b, or High-Grade pT1a)

• Baseline Post-Op Visit (4–6 Weeks): Physical examination and baseline renal panel (creatinine, eGFR, electrolytes).
• Abdominal Imaging: Contrast-enhanced CT or MRI of the abdomen/pelvis at 6 months, followed by annual cross-sectional scans for years 1 through 5.
• Chest Imaging: Chest CT or high-quality chest X-ray every 6–12 months for 3 years, then annually up to year 5.
• Long-Term: Imaging every 2 years from years 6 through 10.

High-Risk Protocol (pT2–pT3, or Adverse Histology)

• Initial Evaluation (3–6 Months): Comprehensive baseline cross-sectional imaging (chest, abdomen, and pelvis CT/MRI).
• Abdominal & Chest Imaging: Contrast-enhanced CT or MRI of abdomen, pelvis, and chest every 3 to 6 months for the first 3 years, then every 6 months in years 4 and 5.
• Brain & Bone Imaging: Not routine; recommended only if the patient develops specific symptoms (e.g., persistent bone pain, neurological deficits, elevated alkaline phosphatase).
• Long-Term: Lifelong surveillance, typically scanning every 12 to 24 months beyond year 5 due to the risk of late recurrence.