Abstract
Background. - Townes-Brocks syndrome (TBS) is a rare autosomal dominant entity mainly characterized by ano-rectal, ear and extremities abnormalities which variable clinical expression. Case reports. - The first case had ear and extremities, but not anorectal, abnormalities; a Pierre-Robin sequence with esophageal atresia was also observed. The second case had the classical triad of abnormalities also associated with tetralogy of Fallot wich has been only once reported in the literature. Conclusions. - Both cases are other examples of the frequent clinical variability observed in this syndrome explaining diagnostic difficulties in the absence of a specific marker.
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