Idiopathic scoliosis (IS) is a spine deformity of unknown etiology. Family studies have suggested that IS may be inherited as a mendelian autosomal dominant trait. We have performed linkage analysis on a three-generation IS Italian family. A positive LOD score value of 3.20 at theta=0.00 was detected with marker D17S799 after a genome-wide scanning. Analysis of six flanking microsatellites confirmed the linkage and haplotype inspection defined an interval of about 20 cM between D17S947 and D17S798. This is the first locus reported for IS. We scored genes mapping in this interval and studied the heparan sulfotransferase genes as candidates on the basis of their biochemical role. No causative mutation was detected in the affected patients.

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Our experience shows that VFSS precisely classifies the degree of dysphagia that conditions the dietary management of each neurologically compromised patient.

The incidence of ALS in the province of Catania is close to those reported worldwide. The incidence was higher amongst the population living on the eastern flank of Mount Etna, which could be interpreted as a possible role of volcanogenic TEs. Further research on TEs and genetic factors is necessary to support this assumption.