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Pathology Departments Requesting & Reporting Blood Test Information Phlebotomy Guide Contact us
Blood Sciences

Blood Test Information

(a.k.a CTO)
minimum sample volume required ~ 5ml

  back to assay index

Test Code: CTO

Tube type: SST

Special instructions
Must be received on ice within 30 minutes of collection.

Fasting sample recommended.

Reference Range
Male: <11.8 ng/L
Female: <4.8 ng/L

Sent away to Charing Cross Hospital, London.
Contact Laboratory before requesting


Turnaround Time
21 days

Department: Biochemistry

Clinical Application
Calcitonin is used in the diagnosis and monitoring of medullary carcinoma of the thyroid (MTC).

MTC can be part of an inherited condition Multiple Endocrine Neoplasia II (MEN type II). Measurement of calcitonin is used in the screening of patients with a family history of MTC or who have other component disorders of the MEN type II complex. Please contact laboratory for further information.

Website updated March 2024