Fibroblast growth factor is involved in phosphate metabolism. Over-expression leads to phosphate excretion. High levels are found in hypophosphataemic rickets. Clinical indication for request: a marker for the phosphate-wasting condition oncogenic osteomalacia and also hypophosphataemic rickets.
Tube
04 (EP) – EDTA Plasma
ID
Tests&Tubes0187
Additional Information
Fasting sample required. Patient must not be ferritin deficient. Sample should be sent to the lab within one hour of collection.
This is the frontline test for FGF-23 however results can be affected by reduced renal function. If the patient has CKD stage 3+ then FGF23 Intact should be requested instead.
Turn around
Turnaround time stated by Norfolk & Norwich: 6 weeks.
Send to
Blood Sciences LGI
(Test referred to: Norfolk & Norwich University Hospital.)
Contact
For further details please contact Leeds Pathology customer services: [email protected].
Advice
Full information on all referred tests can be found on the referred tests information database, EQMS reference BSF2REC17003.
Collection Con
Instructions to lab: Centrifuge, separate and freeze plasma within 1h of sample collection.
Minimum volume: 0.3mL plasma.
Sample REQ
Blood
Ref Range Notes
<100 RU/mL
Interpretation will be provided with the report.
Units
RU/mL