Basophils

HematologyAlso known as: Basophil granulocytescells/uL

Counts basophil immune cells in synovial joint fluid to assess joint inflammation.

Normal Range
0 – 0.3 10*3/uL
10*3/uL
Abnormal Levels
< 0 cells/uL
> 200 cells/uL
Specimen Type
Blood

Why This Biomarker Matters

Elevated basophils in joint fluid indicate inflammatory arthritis or infection. This test helps diagnose the cause of joint pain and guides appropriate treatment.

Understanding Your Results

Normal Range

0 – 0.3 10*3/uL

Optimal Ranges

Clinician-defined 4-point reference thresholds (cells/uL)

Default Range

0
50
150
200
Low
0 cells/uL
Borderline Low
50 cells/uL
Optimal
150 cells/uL
Borderline High
200 cells/uL

Overview

Basophils are immune cells that release histamine and other chemicals during allergic reactions and inflammation. This test measures basophil counts in synovial fluid (joint fluid), which helps diagnose joint inflammatory conditions like rheumatoid arthritis, gout, or septic arthritis. Elevated basophils in joint fluid indicate inflammation or immune response in the joint. Results guide diagnosis and treatment of joint disease.

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

704-7Primary
Basophils [#/volume] in Blood by Automated count
10*3/uL
35074-4
Basophils [#/volume] in Synovial fluid
10*3/uL
44048-7
Basophils [Presence] in Nose by Light microscopy
35072-8
Basophils [#/volume] in Cerebral spinal fluid
10*3/uL
40571-2
Basophils [#/volume] in Body fluid by Manual count
10*3/uL
76406-8
Basophils [#] in Body fluid by Manual count
{#}
35071-0
Basophils [#/volume] in Body fluid
10*3/uL
705-4
Basophils [#/volume] in Blood by Manual count
10*3/uL
26444-0
Basophils [#/volume] in Blood
10*3/uL
44040-4
Basophils [Presence] in Cerebral spinal fluid by Light microscopy
44041-2
Basophils [Presence] in Synovial fluid by Light microscopy
44042-0
Basophils [Presence] in Pericardial fluid by Light microscopy
44043-8
Basophils [Presence] in Pleural fluid by Light microscopy
44044-6
Basophils [Presence] in Peritoneal fluid by Light microscopy
44018-0
Basophils [Presence] in Body fluid by Light microscopy
55771-0
Basophils [#] in Cerebral spinal fluid by Manual count
{#}
66142-1
Basophils [#/volume] in Blood from Fetus by Manual count
10*3/uL
68392-0
Basophils [#/volume] in Peritoneal fluid by Manual count
10*3/uL
68393-8
Basophils [#/volume] in Pericardial fluid by Manual count
10*3/uL
68394-6
Basophils [#/volume] in Pleural fluid by Manual count
10*3/uL
68395-3
Basophils [#/volume] in Synovial fluid by Manual count
10*3/uL
68397-9
Basophils [#/volume] in Vitreous fluid by Manual count
10*3/uL
35075-1
Basophils [#/volume] in Pleural fluid
10*3/uL
35073-6
Basophils [#/volume] in Peritoneal fluid
10*3/uL
74406-0
Basophils [#/volume] in Cord blood
10*9/L
34579-3
Basophils [#/area] in Peritoneal fluid by Microscopy high power field
/[HPF]

Available Lab Tests

Order tests that measure this biomarker

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Results in Same day to 1 business day