Collaborative Stage

Note 1: Each stage should be classified as either A or B according to the absence or presence
of defined constitutional symptoms, such as:
1. Fevers: Unexplained fever with temperature above 38 degrees C;
2. Night sweats: Drenching sweats that require change of bedclothes;
3. Weight loss: Unexplained weight loss of more than 10% of the usual body
weight in the 6 months prior to diagnosis.
Note 2: Pruritus alone does not qualify for B classification, nor does alcohol intolerance, fatigue, or a short, febrile illness associated with suspected infections.
Note 3: Assign code 000 if the History and Physical, progress notes or consultations make no mention of "B" symptoms.

The "A" or "B" is appended to the stage I-IV as determined in the data item CS Site-Specific Factor 2, Systemic Symptoms at Diagnosis.

Code	Description	Modifier
000	No B symptoms (Asymptomatic)	A
010	Any B symptoms: Night sweats Unexplained fever (above 38 degrees C) Unexplained weight loss (generally greater than 10% of of body weight in the six months before admission) B symptoms, NOS	B
020	Pruritis (if recurrent and unexplained)	A
030	(010) + (020)	B
999	Unknown if symptoms; insufficient information Not documented in patient record	BLANK

CS Site-Specific Factor 2
Systemic Symptoms at Diagnosis