Date of Cancer-Directed Surgery (CoC) Date of Surgery Date of First Surgical Procedure (CoC)
1200
8
CoC
1456-1463
Description
Date the first surgery of the type described under Surgery of Primary Site, Scope of Regional Lymph Node Surgery, or Surgery of Other Regional Site(s), Distant Site(s) or Distant Lymph Nodes was performed. See also RX Summ--Surg Prim Site [1290], RX Summ--Scope Reg LN Sur [1292], and RX Summ--Surg Oth Reg/Dis [1294]. See page 99 for date format.
Rationale
The dates on which different treatment modalities were started are used to evaluate whether the treatments were part of first-course therapy and to reconstruct the sequence of first-course treatment modes.