Test Id : DEXT
Dermatopathology Consultation, Wet Tissue
Useful For
Suggests clinical disorders or settings where the test may be helpful
Histologic diagnosis and differential diagnosis of cutaneous diseases
Highlights
Our consultative practice strives to provide the highest quality diagnostic consultative service, balancing optimal patient care with a cost-conscious approach that supports the rapid turnaround time for diagnostic results.
Reflex Tests
Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial tests.
| Test Id | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| LEV2P | Level 2 Gross and microscopic | No | No |
| LEV3P | Level 3 Gross and microscopic | No | No |
| LEV4P | Level 4 Gross and microscopic | No | No |
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Laboratory approval is required prior to ordering this test. Contact Mayo Clinic Laboratories at 800-533-1710.
When this test is ordered, 1 of the 3 reflex tests will be performed at an additional charge. Appropriate additional stains and other ancillary testing may also be performed, at an additional charge, to determine a diagnosis.
For more information see Pathology Consultation Ordering Algorithm
Method Name
A short description of the method used to perform the test
Formalin-fixed tissues: Process/Embed
Serial sections: Hematoxylin and Eosin Stain/Light Microscopy
NY State Available
Indicates the status of NY State approval and if the test is orderable for NY State clients.
Reporting Name
Lists a shorter or abbreviated version of the Published Name for a test
Aliases
Lists additional common names for a test, as an aid in searching
Biopsy
DEXT
Skin Biopsy
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Laboratory approval is required prior to ordering this test. Contact Mayo Clinic Laboratories at 800-533-1710.
When this test is ordered, 1 of the 3 reflex tests will be performed at an additional charge. Appropriate additional stains and other ancillary testing may also be performed, at an additional charge, to determine a diagnosis.
For more information see Pathology Consultation Ordering Algorithm
Specimen Type
Describes the specimen type validated for testing
Tissue
Ordering Guidance
This test is only for a dermatopathology wet tissue consultation. For a dermatologic consultation on paraffin embedded tissue and slides, order PATHC / Pathology Consultation.
Shipping Instructions
Attach the green "Attention Pathology" address label (T498) to the outside of the transport container before putting into the courier mailer.
Necessary Information
All requisition and supporting information must be submitted in English.
Each of the following items is required:
1. All requisitions must be labeled with:
-Patient name, date of birth and medical record number
-Name and phone number of the referring pathologist or ordering physician
-Anatomic site and collection date
2. A brief patient history is essential to achieve a consultation fully relevant to the ordering clinician’s needs.
3. Preliminary diagnosis or differential diagnosis
4. Clinical and/or dermoscopic images should be included if available. Submit with the request via Epic Care Everywhere, Mayo Clinic Image Share, or external storage device.
ORDER QUESTIONS AND ANSWERS
| Question ID | Description | Answers |
|---|---|---|
| Q0000038 | Biopsy site? | |
| Q0000201 | Clinical Diagnosis/Patient History: | |
| Q0000025 | Contact physician name? |
Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Supplies: Dermatopathology Media (T101)
Sources: Skin or oral mucosa
Container/Tube: Screw-capped container or vial containing 10% formalin
Specimen Volume: Entire specimen
Collection Instructions: For scalp biopsies: when the differential diagnosis includes a scarring alopecia, 2 separate 4-mm punch biopsies are recommended (1 for vertical and 1 for horizontal sections). If a single scalp biopsy is received with the clinical diagnosis of a scarring alopecia, the specimen will be processed with horizontal sections.
Additional Information: STAT requests are not accepted for this test.
Special Instructions
Library of PDFs including pertinent information and forms related to the test
Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the testing laboratory. The minimum volume is sufficient for one attempt at testing.
Size needed depends on diagnosis and size of lesion.
Reject Due To
Identifies specimen types and conditions that may cause the specimen to be rejected
Specimen Stability Information
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Tissue | Ambient | ||
Useful For
Suggests clinical disorders or settings where the test may be helpful
Histologic diagnosis and differential diagnosis of cutaneous diseases
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Laboratory approval is required prior to ordering this test. Contact Mayo Clinic Laboratories at 800-533-1710.
When this test is ordered, 1 of the 3 reflex tests will be performed at an additional charge. Appropriate additional stains and other ancillary testing may also be performed, at an additional charge, to determine a diagnosis.
For more information see Pathology Consultation Ordering Algorithm
Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Dermatopathology involves histologic examination of skin biopsy and oral mucosal specimens.
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.
Diagnosis and description of microscopic findings
Interpretation
Provides information to assist in interpretation of the test results
Histologic diagnosis is based primarily on interpretation of hematoxylin and eosin-stained sections. Special histochemical stains, such as alcian blue, Giemsa, or periodic acid-Schiff, may be necessary in some cases.
Interpretation is based on evaluation of patterns including architectural and cytologic details, which are included in a microscopic description.
Cautions
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
Specific diagnosis may require correlation with clinical information.
Clinical Reference
Recommendations for in-depth reading of a clinical nature
1. Lever WF, Schaumburg-Lever G. Histopathology of the Skin. 7th ed. JB Lippincott; 1990
2. Elder D, Elenitsas R, Ioffreda M, et al, eds. Atlas of Dermatopathology: Synopsis and Atlas of Lever's Histopathology of the Skin. 4th ed. Lippincott Williams and Wilkins; 2020
Method Description
Describes how the test is performed and provides a method-specific reference
Formalin-fixed, paraffin-embedded skin biopsy sections are stained and interpreted utilizing a bright-field microscope.(Elder DE, Elenitsas R, Rosenbach M, Murphy GF, Ruben AL, Xu X, eds. Lever's Histopathology of the Skin. 11th ed. Lippincott Williams and Wilkins; 2019)
PDF Report
Indicates whether the report includes an additional document with charts, images or other enriched information
Day(s) Performed
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.
Monday through Friday
Report Available
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.
Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Performing Laboratory Location
Indicates the location of the laboratory that performs the test
Fees :
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.
- Authorized users can sign in to Test Prices for detailed fee information.
- Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
- Prospective clients should contact their account representative. For assistance, contact Customer Service.
Test Classification
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.
Not Applicable
CPT Code Information
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
CPT codes are provided by the performing laboratory.
CPT codes are provided by the performing laboratory.
88302 (if appropriate)
88304 (if appropriate)
88305 (if appropriate)
LOINC® Information
Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and results codes of this test. LOINC values are provided by the performing laboratory.
| Test Id | Test Order Name | Order LOINC Value |
|---|---|---|
| DEXT | Dermatopathology Consult | 60570-9 |
| Result Id | Test Result Name |
Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
|---|---|---|
| 71139 | Interpretation | 33746-9 |
| 71140 | Participated in the Interpretation | No LOINC Needed |
| 71141 | Report electronically signed by | 19139-5 |
| 71142 | Addendum | 35265-8 |
| 71143 | Gross Description | 22634-0 |
| 71582 | Disclaimer | 62364-5 |
| 71854 | Case Number | 80398-1 |