“…Although renal agenesis is reported to be frequently sporadic, 65 families with recurrence of renal agenesis or related anomalies in the absence of any clearly defined syndrome have been reported [Madisson, 1934;Bound, 1943; KallCn and Winberg, 1944;Waardenburg, 1952;Baron, 1954;Arends, 1957; Hilson, 1957;Rosenfeld, 1959;Gorvoy et al, 1962; Carbonell-Estrany and Castejon, 1964;Rizza and Downing, 1971;Buchta et al, 1973; Kohn and Borns, 1973; Whitehouse and Montrose, 1973; Caine et al, 1974; Hack et al, 1974;Mauer et al, 1974;Morillo-Cucci et al, 1974;Wiersma et al, 1976;Zonana et al, 1976;Kaffe et al, 1977;Pashayan et al, 1977;Schinzel et al, 1978;Carter et al, 1979;Horr, 1979;Knudsen et al, 1979;Miskin, 1979;Balfour and Lawrence, 1980;Schimke and King, 1980;Remes et al, 1981;Roodhooft and Holmes, 1981;Helin et al, 1983; Biedl et al, 1984;Curry et al, 1984;Roodhooft et al, 1984;Yates et al, 1984;Romero et al, 1985; Wilson and Hayden, 19851. In 33 families, only sibs are affected, suggesting autosomal recessive inheritance, but in most of these, the parents did not have renal evaluation.…”