70016 - Clinical: Hematopathology Consultation, Wet Tissue

Test Catalog

Test Name

Test ID: 70016    
Hematopathology Consultation, Wet Tissue

Useful For Suggests clinical disorders or settings where the test may be helpful

Obtaining a rapid, expert opinion on unprocessed specimens referred by the primary pathologist


Obtaining special studies not available locally

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

A Mayo Clinic hematopathologist will provide a full bone marrow workup which includes an evaluation of the specimen and determination of a diagnosis provided within a formal pathology report.

When a consultation is requested, the client is responsible for submitting the following specimens:

1. Wet (fresh) core biopsy and/or bone marrow aspirate clot submitted in formalin

2. Bone marrow aspirate samples collected in:

a. Lavender top (EDTA): molecular testing

b. Yellow top (ACD): flow cytometric testing

c. Green top (sodium heparin): chromosome analysis and FISH testing

3. Slides prepared from bone marrow and peripheral blood


Ancillary Testing

Based on Mayo Clinic-approved algorithms and/or a staff hematopathologists' discretion, ancillary testing may be performed in order to render an accurate diagnosis and provide important prognostic information. These test results will be incorporated into the consultative report and will be billed and reported separately.


-Tier 1 Testing: eg, cytochemical stains on bone marrow aspirate smear, immunohistochemical stains on bone marrow biopsy or clot sections, chromosome analysis, FISH, flow cytometry and/or molecular testing will be added as appropriate. Results will be incorporated into the pathology report, as well as, some separate standalone results may be released. All will be charged.

-Tier 2 Testing: eg, Next Generation Sequencing (NGS) or microarray testing will only be added upon approval of the ordering physician/pathologist (client).


If ancillary testing (eg, flow cytometry) is desired by the client outside of this consultation, each test must be ordered separately. Tests ordered outside of the consultation may or may not be integrated into the final pathology report based on staff hematopathologist's discretion.


If the volume of bone marrow aspirate is limited, prioritization of testing will be determined by the staff hematopathologist. Testing requested/suggested by the referring physician (immunostains, molecular studies, etc) may not be performed if deemed unnecessary by the reviewing staff hematopathologist.


Note: Calls are not routinely made; however, depending on the nature of the case, a call may be placed to the ordering provider or pathologist. These situations include, but are not limited to, a new diagnosis of acute leukemia or aggressive high grade lymphoma. To contact a Mayo Clinic Hematopathologist, please call the Hematopathology Communications team, 507-284-5600.


If a client chooses to embed the clot/biopsy, the bone marrow aspirate specimens (tubes) should be sent in the same package as the bone marrow biopsy/clot sections. Embedding at the client site may delay specimen arrival at Mayo Medical Laboratories and preclude the ability to perform some ancillary testing due to specimen stability.


If a consultation is requested and only formalin-fixed, paraffin-embedded (FFPE) samples will be submitted, please order 70012 / Pathology Consultation.

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

Diagnosis of a hematologic disease requires thorough and accurate morphologic examination of peripheral blood, bone marrow and interpretation of ancillary testing results (eg, cytochemistry, immunohistochemistry, flow cytometric immunophenotyping, chromosome analysis, FISH testing, and molecular genetics) by a highly qualified hematopathologist. With recent advent of new understanding and more treatment options, more ancillary tests are available. Efficient utilization and accurate interpretation of these tests are crucial in patient care. These tests can not only assist to render accurate diagnosis but also could provide prognostic prediction and potential indication or guidance of therapy.


It is the Division of Hematopathology's mission to provide the highest possible level of diagnostic consultative service, trying to balance optimal patient care with a cost-conscious approach to solving difficult diagnostic problems for all patients. If a bone marrow consult is requested, the Mayo Clinic hematolopathologists will approach the diagnosis in the same way as Mayo Clinic's own in-house cases.

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

The laboratory will provide a pathology consultation.

Interpretation Provides information to assist in interpretation of the test results

Results of the consultation are reported in a formal pathology report that includes a description of ancillary test results (if applicable) and an interpretive comment. When the case is completed, results may be communicated by a phone call. The formal pathology report is faxed.


In our consultative practice, we strive to bring the customer the highest quality of diagnostic pathology, in all areas of expertise, aiming to utilize only those ancillary tests that support the diagnosis in a cost-effective manner, and to provide a rapid turnaround time for diagnostic results.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

All appropriate stained/ unstained slides, biopsy tissue and aspirate are required in order to make a diagnosis. The referring pathologist's and clinician's name and phone numbers are essential. Specific diagnosis may require correlation with clinical information, this information must be included.

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test