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Test ID: 9273    
Subcutaneous Fat Aspirate

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Method Description Describes how the test is performed and provides a method-specific reference

The technique involves sterilizing and anesthetizing a small area of the anterior abdominal wall. Subcutaneous fat is then aspirated into a syringe attached to a large bore needle. The small bits of fat obtained are crushed under a glass slide and stained with Congo red. Positive staining with the Congo red stain is indicated by apple-green birefringence utilizing a polarized microscope.(Libbey CA, Skinner M, Cohen AS: Use of abdominal fat tissue aspirate in the diagnosis of systemic amyloidosis. Arch Intern Med 1983;143:1549-1552; Westermark P, Stenkvist B: A new method for the diagnosis of systemic amyloidosis. Arch Intern Med 1973;132:522-523)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.

Monday through Friday; Varies

Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

1 day

Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result

4 days

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 The location of the laboratory that performs the test