In this report, we show that Cys 618 Arg mutation cosegregates with familial MTC and HSCR in two Moroccan Jewish families in which no involvement of pheochromocytoma or parathyroidism was observed.
In this study, we report on a novel kindred with MEN 2A and HSCR phenotype associated with a point mutation (C618R) in one of the cysteine codons at the extracellular domain of the RET proto-oncogene.