Phase II Radiation Primary Treatment Volume

Field length: 2

Description
Identifies the primary treatment volume or primary anatomic target treated during the second phase of radiation therapy during the first course of treatment. This data item is required for CoC-accredited facilities as of cases diagnosed 01/01/2018. Blanks allowed if no Phase II radiation treatment administered.

Rationale
Radiation treatment is commonly delivered in one or more phases. Typically, in each phase, the primary tumor or tumor bed is treated. This data item should be used to indicate the primary target volume, which might include the primary tumor or tumor bed. If the primary tumor was not targeted, record the other regional or distant site that was targeted. Draining lymph nodes may also be targeted during the second phase. These will be identified in a separate data item Phase II Radiation to Draining Lymph Nodes [1515].

This data item provides information describing the anatomical structure targeted by radiation therapy during the second phase of radiation treatment and can be used to determine whether the site of the primary diseases was treated with radiation or if other regional or distant sites were targeted. This information is useful in evaluating the patterns of care within a facility and on a regional or national basis. The breakdown and reorganization of the sites will allow for concise reporting.