Answer:
c (Clinical) Assigned at the time of diagnosis and before treatment.
Step-by-step explanation:
The definitions for the AJCC staging classification prefixes are: c (Clinical) - Assigned at the time of diagnosis and before treatment. yc (y Clinical) - Assigned after systemic/radiation therapy of neoadjuvant and before surgery. p (Pathologic) - Assigned after completion of definitive surgery. yp (y Pathologic) - Assigned post neoadjuvant therapy systemic and/or radiation therapy and surgery. a (Autopsy) - Assigned at the time of the incidental finding on a postmortem examination. r (Retreatment) - Assigned at the time of recurrence after a disease-free interval.