Type : Phenotype or locus, molecular basis unknown;
Alternative titles and symbols : Poland syndactyly; Poland anomaly; Poland sequence;
Included titles and symbols : Pectoralis muscle, absence of;
Description : Poland syndrome consists of unilateral absence or hypoplasia of the pectoralis muscle,
most frequently involving the sternocostal portion of the pectoralis major muscle,
and a variable degree of ipsilateral hand and digit anomalies, including symbrachydactyly.
Sometimes called Poland sequence, it was first described by Poland (1841). Poland
syndrome is most commonly a sporadic condition (David, 1982; Opitz, 1982), but familial
cases have been reported.;