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2015 ; 372
(23
): 2235-42
Nephropedia Template TP
Rehm HL
; Berg JS
; Brooks LD
; Bustamante CD
; Evans JP
; Landrum MJ
; Ledbetter DH
; Maglott DR
; Martin CL
; Nussbaum RL
; Plon SE
; Ramos EM
; Sherry ST
; Watson MS
N Engl J Med
2015[Jun]; 372
(23
): 2235-42
PMID26014595
show ga
On autopsy, a patient is found to have hypertrophic cardiomyopathy. The patient?s
family pursues genetic testing that shows a ?likely pathogenic? variant for the
condition on the basis of a study in an original research publication. Given the
dominant inheritance of the condition and the risk of sudden cardiac death, other
family members are tested for the genetic variant to determine their risk.
Several family members test negative and are told that they are not at risk for
hypertrophic cardiomyopathy and sudden cardiac death, and those who test positive
are told that they need to be regularly monitored for cardiomyopathy on
echocardiography. Five years later, during a routine clinic visit of one of the
genotype-positive family members, the cardiologist queries a database for current
knowledge on the genetic variant and discovers that the variant is now
interpreted as ?likely benign? by another laboratory that uses more recently
derived population-frequency data. A newly available testing panel for additional
genes that are implicated in hypertrophic cardiomyopathy is initiated on an
affected family member, and a different variant is found that is determined to be
pathogenic. Family members are retested, and one member who previously tested
negative is now found to be positive for this new variant. An immediate clinical
workup detects evidence of cardiomyopathy, and an intracardiac defibrillator is
implanted to reduce the risk of sudden cardiac death.
|*Databases, Genetic
[MESH]
|*Genetic Variation
[MESH]
|*Genome, Human
[MESH]
|Genetic Diseases, Inborn/*genetics
[MESH]
|Genetic Predisposition to Disease/*genetics
[MESH]