[Poland's syndrome: presentation of two cases diagnosed during the neonatal period (author's transl)].

Two cases of Poland syndrome, diagnosed during the neonatal period, are reported. The children exhibited the following malformations: absence of the costosternal head of the pectoralis major, brachysyndactyly, hypoplasia of the upper limb. There were also other associated anomalies such as: Sprengel deformity in one case, hypoplasia of the lower limb and absence of a toe on the same site, in the other case. The authors point out the possibility of associating other multiple abnormalities and they examine the various pathogenic hypothesis presented in the literature.