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Van Buggenhout, G. et al.

Van Buggenhout, Van Ravenswaaij-Arts, Mc Maas, Thoelen, Vogels, Smeets, Salden, Matthijs, Fryns, Vermeesch,

The del(2)(q32.2q33) deletion syndrome defined by clinical and molecular characterization of four patients.

We report four patients with an interstitial deletion of chromosome 2q32-->2q33. They presented similar clinical findings including pre- and postnatal growth retardation, distinct facial dysmorphism, thin and sparse hair and fair built, micrognathia, cleft or high palate, relative macroglossia, dacrocystitis, persisting feeding difficulties, inguinal hernia and broad based gait. All were severely mentally retarded. Three patients had a specific behavioral phenotype with hyperactivity and motor restlessness, chaotic behavior, happy-personality but with periods of aggression and anxiety, sleeping problems and self-mutilation. (head-banging). Array CGH and fluorescence in situ hybridization (FISH) allowed us to delineate the deletion size and showed that the four patients share a 8.1 Mb minimal deleted region. Reviewing additional nine case reports of patients with similar deletions showed striking phenotypic similarities which enabled the delineation of the 2q32.2q33 syndrome. Deletion of 2q32 has been also associated with the wrinkly skin syndrome (WWS) and isolated cleft palate. Although the patients presented here shared many aspects of WWS, they did not had the wrinkly skin. All patients had a cleft or high palate, most likely as a result of hemizygosity for SATB2. A potential commonly deleted interval of the three patients with behavioral problems, excluding the deletion in the patient without behavioral problems, is at most 0.5 Mb in size harboring only two genes.[1]

References

The del(2)(q32.2q33) deletion syndrome defined by clinical and molecular characterization of four patients. Van Buggenhout, G., Van Ravenswaaij-Arts, C., Mc Maas, N., Thoelen, R., Vogels, A., Smeets, D., Salden, I., Matthijs, G., Fryns, J.P., Vermeesch, J.R. European journal of medical genetics. (2005) [Pubmed]

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