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Mayo Clinic Laboratories

Test Code CYTO CSF Cytology Cerebrospinal Fluid

Specimen Handling Instructions

Specimens are collected without alcohol or other fixatives added.

 

When a fungal infection is clinically suspected, the requisition should note this to be sure the appropriate histochemical stains are performed.

  

     Usually a small amount of fluid is collected through a lumbar tap. However, fluid may be aspirated from the

     ventricular and suboccipital space as well. The ventricular fluid is frequently the most cellular specimen.

 

    The fluid is collected into a clean, dry container, (which need not be sterile), and sent to the laboratory as

    soon as possible. Specimen container should have a secure lid/cap.

Department

Cytology

Routine Turn-around Time

1 day

Preferred Specimen

The diagnostic accuracy improves with the collection of larger samples. If several samples are obtained, the second or third should be used for cytology.