Clinics and Departments

Laboratory Services

Lab Dept:

Anatomic Pathology

Test Name:


General Information

Lab Order Codes:



Aneuploidy of chromosomes X, Y, 13, 18, 21; Aneuploidy probe study; Perinatal probe X/Y/18/13; Aneuploidy FISH; Trisomy 13, 18, or 21; Sex chromosome abnormalities, Down, Turner or Klinefelter Syndrome

CPT Codes:

88271 x5 – Molecular cytogenetics, DNA probe, each (eg, FISH)
88274 x2 – Molecular cytogenetics; interphase in situ hybridization, analyze 25-99 cells

Test Includes:

Interpretive report of findings


Test Indications:

Prenatal or congenital blood specimen study to determine aneuploidy of chromosomes X, Y, 13, 18 or 21

Lab Testing Sections:

Anatomic Pathology – Sendouts

Referred to:

Allina Medical Laboratories

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

24 hours daily

Turnaround Time:

1 – 4 days

Special Instructions:

Special tube required. See Container, contact the laboratory for appropriate tube.


Specimen Type:

Whole blood


Green top (Sodium Heparin), no gel, tube

Draw Volume:

5 mL (Minimum: 2 mL) blood

Processed Volume:

Same as Draw Volume


Routine venipuncture

Special Processing:

Lab Staff: Do Not centrifuge. Forward specimen to Send Outs. Store and ship at room temperature, avoid freezing. Ship on the same day of collection to arrive at reference lab 7 days a week. Each specimen should be labeled with two forms of patient identification. These forms of identification must also appear on the requisition form.

Patient Preparation:


Sample Rejection:

Improper storage; mislabeled or unlabeled specimen; wrong container (anticoagulant or solution); improper blood/anticoagulant ratio; delay in transport; inappropriate timing of collection; interfering substances; dietary limitations; container leakage resulting in compromised specimen


Reference Range:

Normal or abnormal with interpretation

Critical Values:



The cytogenetics lab does not report mosaic FISH results.


Fluorescent In situ Hybridization


Allina Medical Laboratories August 2013

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