Is 500 cGy x 5 an appropriate palliative regimen for a patient with a low-lying metastatic rectal cancer with ongoing pain and bleeding despite chemotherapy?

25 Gy in 5 fractions is my preferred regimen for palliation of a symptomatic rectal primary in patients with metastatic rectal cancer. I’ve used it numerous times with generally very favorable results for symptom palliation, local control, and tolerance. There is also a couple of series which have utilized it in the context of oligometastatic disease as the “definitive” management of the pelvis akin to the use of radiotherapy as non-operative management for patients with localized disease (Holli...

In the oligo metastatic setting - certainly reasonable to utilize 5x5 upfront to then bridge to a possible definitive treatment after systemic therapy. If someone has pain and bleeding through and widely metastatic - while I have used 5x5 as palliation before - I am cautious. It can lead to severe pain and Tenesmus in some patients. If the patient is a poor performer - ECOG 3 - and widely metastatic, are you achieving better pain relief and bleeding response? In terms of both bleeding and pain f...

For rectal cancer patients with untreated gross disease, there can be pain, diarrhea, obstipation, and bleeding. Radiation works very well for palliation of these symptoms.

In general, I prefer shorter courses of RT, particularly for palliation. However, having treated many patients with 25 Gy in 5 fractions curatively with RAPIDO-style TNT regimen, a significant proportion of patients develop severe cramping, tenesmus, distention - basically "pelvic h*ll". This subsides with conservative managem...