Peripheral Blood Involvement

This input is used for staging

Notes

**Note 1:** The categories for peripheral blood involvement (B rating) are * B0: No significant blood involvement * B1: Low blood tumor burden * B2: High blood tumor burden **Note 2:** Physician statement of B rating can be used to code this data item. **Note 3:** If counts or percentages of neoplastic cells and clonality test results are available, but a B rating is not stated by the physician, the registrar can use the information and assign a B rating and code this data item accordingly. If this information is not available, code 9.

Default

9

NAACCR Item

NAACCR #3910

Metadata

SSDI
Code Description B Map
0 Absence of significant blood involvement 5% or less of peripheral blood lymphocytes are atypical (Sezary) cells Clone unknown Stated as B0 B0
1 Absence of significant blood involvement 5% or less of peripheral blood lymphocytes are atypical (Sezary) cells Clone negative Stated as B0a B0a
2 Absence of significant blood involvement: 5% or less of peripheral blood lymphocytes are atypical (Sezary) cells Clone positive Stated as B0b B0b
3 Low blood tumor burden More than 5% of peripheral blood lymphocytes are atypical (Sezary) cells but does not meet the criteria of B2 Clone unknown Stated as B1 B1
4 Low blood tumor burden More than 5% of peripheral blood lymphocytes are atypical (Sezary) cells but does not meet the criteria of B2 Clone negative Stated as B1a B1a
5 Low blood tumor burden More than 5% of peripheral blood lymphocytes are atypical (Sezary) cells but does not meet the criteria of B2 Clone positive Stated as B1b B1b
6 High blood tumor burden Greater than or equal to 1000 Sezary cells per microliter (uL) Clone positive Stated as B2 B2
7 Test ordered, results not in chart BX
9 Not documented in medical record Peripheral Blood Involvement not assessed or unknown if assessed BX