How would you treat/counsel a patient with Stage IB3 SCC of the cervix who is 18 weeks pregnant and desires to maintain pregnancy?  

Difficult situation. The patient should be offered termination of pregnancy. If that is not the patient's choice, or if it is not a possibility, then I would suggest surgical lymphadenectomy as a first step.  If nodes are negative, one can consider neoadjuvant chemotherapy with platinum based ...