“…Although HIR2 and CON2 datasets indicated no familiality, statistical evidence of heterogeneity between the results of HIRl and HIR2, or between CONl and CON2 was lacking. A SIDS incidence of 11.2/1,000 was documented among the relatives of CONl vs. 1.8/1,000 INTRODUCTION Idiopathic congenital central hypoventilation syndrome (CCHS) is a rare entity with fewer than 100 published cases [Becker and Takashima, 1985;Beckerman et al, 1986;Bower and Adkins, 1980;Coleman et al, 1980;Deonna et al, 1974;Ellis et al, 1987;Fleming et al, 1980;Folgering et al, 1979;Guilleminault et al, 1982;Haddad et al, 1978;Hamilton and Bodurtha, 1989;Hunt et al, 1978Hunt et al, ,1979Hunt et al, ,1988Khalifa et al, 1988;Liu et al, 1978;Marcus et al, 1991;Mellins et al, 1970;Minutillo et al, 1989;Nattie et al, 1975;Nielson and Black, 1990;O'Dell et al, 1987;Oren et al, 1986Oren et al, ,1987Paton et al, 1989;Ruth et al, 1983;Shannon et al, 1976;Silvestri et al, 1992;Stern et al, 1981;Swaminathan et al, 1989;Weese-Mayer et al, 1988Weese-Mayei-e t al., 1992a, b;Wells et al, 1980;Woo et al, 19921. Diagnosed in the absence of neuromuscular, lung disease, or an identifiable brainstem lesion, CCHS is cliaracterized by normal ventilation while the patient is awake but hypoventilation with normal respiratory rates and shallow breathing (diminished tidal volume) during sleep.…”