Mednet Logo
CommunityMedical Oncology

How would you treat a p16+ squamous cell carcinoma confined in the recto-vaginal septum with no suspicious adenopathy on PET or MRI?

The patient is a female in her 40s. No mucosal changes were evidenced on clinical exam. Chemo-RT is recommended by GynOnc at an academic center. What would you treat it to? What regional nodal basins would you cover?
6 Answers
Mednet Member
Mednet MemberInvited Expert
Radiation Oncology · University of New Mexico School of Medicine
Answered on

Early vaginal or anal cancer still has relatively high rates of lymph node involvement. In vaginal cancer, T1 lesions have lymph node involvement rates of 5 - 15%. In anal cancer, T1 lesions have a higher rate of 5 - 50%. If there are no mucosal changes then it is possible this is an in-transit LN f...

Join for free or sign in to see the full answer

Mednet Member
Mednet MemberInvited Expert
Radiation Oncology · University of British Columbia
Answered on

I would favor chemo-radiation for this rare entity, using cisplatinum as a radiation sensitizer as we do for cervical cancer with weekly 40 mg/m2. External radiation should cover the internal and external iliac lymph nodes plus common iliac to 45 Gy/25 fractions. In the case of any involved nodes on...

Join for free or sign in to see the full answer

Mednet Member
Mednet Member
Radiation Oncology · Sunnybrook Health Sciences Centre
Answered on

We have a handful of patients with similar presentations in my practice. A thorough MCC discussion and radiological review to address likely primary should be undertaken prior to deciding on the treatment pathway.

If this is considered to be HPV-associated anal cancer, then the patient would benefit...

Join for free or sign in to see the full answer

Mednet Member
Mednet MemberInvited Expert
Radiation Oncology · Varian Medical Systems/Allegheny health network
Answered on

Definitive concurrent chemo RT. Pelvic nodes with consideration for some mesorectum nodal reaching around primary to 45 Gy.

IMRT boost to primary around 70 Gy based on oar dose.

Join for free or sign in to see the full answer

Mednet Member
Mednet Member
Radiation Oncology · Pikeville Medical Center
Answered on

Wondering if cancer type ID or similar testing would be of any help here.

Join for free or sign in to see the full answer

Mednet Member
Mednet Member
Radiation Oncology · Vanderbilt-Ingram Cancer Center
Answered on

Need to determine whether this is a cancer of mullerian (gynecological) origin or gastrointestinal origin. Biopsies should be evaluable for IHC to differentiate between gynecological markers. If an exact diagnosis was not obtained from the pathologists at either your or the local academic center, wo...

Join for free or sign in to see the full answer