Test Catalog

Test ID: FUCW    
Alpha-Fucosidase, Leukocytes

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

Incubation of 4-methylumbelliferyl-alpha-L-fucopyranoside with cell homogenates results in cleavage of the substrate by alpha-L-fucosidase yielding 4-methylumbelliferone (4-MU) and fucose. Free 4-MU can be quantitated by measurement of the fluorescence.(Beratis NG, Turner BM, Labadie G, Hirschhorn K: a-L-fucosidase in cultured skin fibroblasts from normal subjects and fucosidosis patients. Pediatr Res 1977;11:862-866; Cowan T, Pasquali M: Laboratory Investigations of Inborn Errors of Metabolism. In Pediatric Endocrinology and Inborn Errors of Metabolism. Second edition. Edited by K Sarafoglou, GF Hoffman, KS Roth. 2017, pp 1139-1158)

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.


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.

30 days

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

45 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

WBC homogenate stored 1 month

Performing Laboratory Location Indicates the location of the laboratory that performs the test