Alternate Name Item# Length Source of Standard Column #
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.