The primary erythermalgia-susceptibility gene is located on chromosome 2q31-32.
SourceAmerican Journal of Human Genetics, 68, 5, (2001), pp. 1277-1282
Article / Letter to editor
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American Journal of Human Genetics
SubjectMetabolic aspects of gastrointestinal diseases; Metabole aspecten van maag-, darm- en leveraandoeningen
Primary erythermalgia is a rare disorder characterized by recurrent attacks of red, warm, and painful hands and/or feet. The symptoms are generally refractory to treatment and persist throughout life. Five kindreds with multiple cases of primary erythermalgia were identified, and the largest was subjected to a genomewide search. We detected strong evidence for linkage of the primary erythermalgia locus to markers from chromosome 2q. The highest LOD score (Z) was obtained with D2S2330 (Z(max) = 6.51). Analysis of recombination events identified D2S2370 and D2S1776 as flanking markers, on chromosome 2q31-32. This defines a critical interval of 7.94 cM that harbors the primary erythermalgia gene. Affected members within the additional families also shared a common haplotype on chromosome 2q31-32, supporting our linkage results. Identification of the primary erythermalgia gene will allow a better clinical classification of this pleomorphic group of disorders.
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