Association of distal arthrogryposis, mental retardation, whistling face, and pierre robin sequence: Evidence for nosologic heterogeneity

Abstract
We report on 3 unrelated patients with the heterogeneous fetal hypokinesia sequence. They have distal arthrogryposis, severe developmental retardation, facial anomalies as seen in the Freeman‐Sheldon syndrome (“whistling face”), and Pierre Robin sequence. The present cases show a remarkable clinical resemblance to the 3 sibs described by Illum et al. (Illum N, Reske‐Nielsen E, Skovby F, Askjaer SA, Bersen A 1988: Neuro‐pediatrics 19:186–192), where calcium deposits were found in the nervous system and skeletal muscle. The presence of severe to profound developmental retardation in the present 3 patients is equally in favour of a central nervous system abnormality as the pathogenetic basis of the fetal hypokinesia sequence with secondary facial changes and distal arthrogryposis.

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