"What does it mean?": Uncertainties in understanding results of chromosomal microarray testing.

Reiff M, Bernhardt BA, Mulchandani S, Soucier D, Cornell D, Pyeritz RE, Spinner NB.

Source

Center for the Integration of Genetic Healthcare Technologies, Division of Translational Medicine and Human Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.

Abstract

Purpose:The increased sensitivity of chromosomal microarray (CMA) technology as compared with traditional cytogenetic analysis allows for improved detection of genomic alterations. However, there is potential for uncertainty in the interpretation of test results in some cases. This paper explores how families understand and make meaning of CMA test results, and identifies the needs of families undergoing CMA testing.Methods:We conducted semistructured interviews with parents of 25 pediatric outpatients with CMA test results indicating either a pathogenic alteration or a variant of unknown significance (VUS). Interviews were analyzed qualitatively.Results:Three domains of understanding were identified: comprehension of results, interpretations of scientific uncertainty, and personal meaning for the child and family. Incomplete comprehension of test results and scientific uncertainty were prominent themes for families receiving results in both the VUS and pathogenic categories. Receiving results from non-geneticists and by telephone, long waits to see a geneticist, and misleading Internet searches all contributed to misunderstandings.Conclusion:Differentiating domains of understanding allows for the identification of uncertainties that can be reduced or managed in order to improve understanding of CMA results. Using this framework, we suggest interventions to promote clarity and address the informational needs of families undergoing CMA testing.Genet Med advance online publication 5 January 2012.