• Appropriate preparation of patient for diagnostic and/or posttherapy RAI scan (39,177)

• Results of the diagnostic scan

• Results of the posttherapy scan

• Response to the last ¹³¹I therapy

• Criteria for progression

• Time to progression

• Activity of ¹³¹I administered for the last ¹³¹I therapy

• Total accumulative activity of ¹³¹I administered

• Objectives of ¹³¹I therapy (e.g., cure, progression-free survival, overall survival, palliation)

• Location and number of metastases. They may be radioiodine avid, but perhaps focal direct therapy (e.g., surgery, XRT, cryotherapy, etc.) may be more effective, warranted, or desired.

• Type, frequency, and severity of side effects of ¹³¹I therapy

• Patient’s desires (e.g., patient is a “minimalist” or “maximalist”) (200)