PTD - 4

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Test Directory -  Cytogenetics


Clinical Indications

Identification of chromosomal changes associated with haematological disorders

Request Form

Combined Pathology Blood form (Yellow/Black or Blue for GP's)


Analysed by referral laboratory if specific criteria met.

Specific Criteria

Requested by Consultant Haematologist or if agreed with Consultant Haematologist.

Turnaround Time

5 - 21 days depending on referral laboratory and urgency


Blood and/or bone marrow films. Marrow in 6ml Lithium heparin sample.




Green top (lithium-heparin) tube

Lab. Handling

Send by courier or first class post to referral laboratory. Do not send on Friday or Bank Holiday. 

Causes for Rejection

Unlabelled sample. Not meeting specific criteria for analysis.

Reference Range

See individual reports



Version 1.1 / January 2017