Deletion 20q is a recurring abnormality in myeloid neoplasms, including MDS, AML, and MPN. 20q FISH testing is useful as a cytogenetic prognostic indicator in myeloid neoplasms. Of note, a 20q- in the absence of morphologic criteria is not considered definitive evidence of myeloid disease.

This test can be ordered individually or as part of the MDS FISH Panel. See the panel test for more details.

Bone marrow aspirate:

Collect bone marrow aspirate in a sterile Sodium heparin (Na hep) syringe and transfer to a sterile vial/tube

- or -

1. Collect bone marrow in sterile syringe (non-heparinized) and transfer to a Dk green Sodium heparin (Na hep), no gel
2. Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times, to prevent clotting

Transfer aspirate from syringe to transport container.

Submit entire specimen unspun.

Sterile vial/tube

or

Dk green Sodium heparin (Na hep), no gel

Bone Marrow Core:

Submit in sterile tube/cup filled with sterile culture medium, sterile Hanks Balance Salt Solution (HBSS) or sterile saline

or 

Whole blood:

Dk green Sodium heparin (Na hep), no gel

Immediatley following collection, mix sample by inverting 8 - 10 times to prevent clotting

Submit entire specimen unspun

Sterile tube/cup

or

Dk green Sodium heparin (Na hepl), no gel

AHL Cytogenetics Oncology Request

Ambient

• Improper label (unlabeled or mislabeled)
• Wrong container (anticoagulant or solution)
• Delay in transport
• Improper storage
• Leaking container
• Slides broken beyond repair

Fluorescence in situ hybridization (FISH)

Normal or Abnormal with interpretation.

Medical necessity