How would you treat a synchronous low rectal adenocarcinoma and anal squamous cell carcinoma with involved pelvic and inguinal nodes?
What systemic therapy is most appropriate, how would you sequence, and what RT dose fractionation would you use?
Answer from: Radiation Oncologist at Community Practice
If the patient has intact bowel/anal sphincter function at baseline, I’d favor an organ-preserving approach. I’d treat with standard pelvic + inguinal chemoradiation with a dose/fractionation scheme isoeffective with 45 Gy in 25 fractions targeting pelvis/inguinals and a dose isoeffectiv...
Answer from: Medical Oncologist at Community Practice
Assuming that inguinal nodes are from anal SCC and the rectal tumor is pMMR, from the Medical Oncology perspective, starting treatment with Mitomycin-C and capecitabine concurrently with radiation would make sense. The patient might be benefited from systemic chemo (e.g., FOLFOX, or FOLFIRINOX if hi...
Answer from: Radiation Oncologist at Academic Institution
I've treated a couple of cases like this and would approach this case very differently from the posted answers. I think it is important to remember:
Unresectable anal cancer is curable with RT and appropriate chemotherapy.
Stage III rectal cancer is curable with preoperative RT, and chemotherapy...
Comments
Radiation Oncologist at Mallory Radiotherapy, PLLC It sounds like the big question/controversy is whe...
Radiation Oncologist at Washington University School of Medicine Presumably, you're considering taking the anal pri...
Radiation Oncologist at Mallory Radiotherapy, PLLC Moreso a watch-and-wait approach is pursued if the...
Radiation Oncologist at Washington University School of Medicine I would agree with a watch-and-wait approach for t...
Radiation Oncologist at Mayo Clinic School of Medicine This is a really great discussion. I have a couple...
Answer from: Medical Oncologist at Academic Institution
Great discussion.Just want to add one possible scenario.In the clinic, for this type of situation, we usually would like to biopsy the inguinal lymph node and place fiducial in the node. The inguinal lymph node could be from the distal rectal adenocarcinoma especially if the distal rectal adenocarci...
Answer from: Radiation Oncologist at Community Practice
Given the presentation of concurrent low-rectal adeno ca and anal SCC, the patient would not be a surgical candidate, therefore his treatment would be chemo and radiation, hoping there is no distant metastatic disease. It would be important to know the size, HPV status, and stage of anal cancer...
Comments
Radiation Oncologist at Mallory Radiotherapy, PLLC Thank you for referencing this recent data. I have...
Radiation Oncologist at Sunnybrook Health Sciences Centre We have previously used up to 63 Gy and have not w...
Radiation Oncologist at Cape Oncology What small bowel dose would you accept in this cas...
Radiation Oncologist at Sunnybrook Health Sciences Centre At our institution, the protocol is bowel space (b...
Answer from: Medical Oncologist at Community Practice
How would you treat a synchronous low rectal adenocarcinoma and anal squamous cell carcinoma with involved pelvic and inguinal nodes? The question does not provide details about the clinical stage and location, histopathologic details, MMR, and HPV status of both the rectal and anal tumors desc...