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, 158 (4), 655-659.e2

Potocki-Lupski Syndrome: A Microduplication Syndrome Associated With Oropharyngeal Dysphagia and Failure to Thrive


Potocki-Lupski Syndrome: A Microduplication Syndrome Associated With Oropharyngeal Dysphagia and Failure to Thrive

Claudia Soler-Alfonso et al. J Pediatr.


Objective: Failure to thrive (FTT) is a feature of children with Potocki-Lupski syndrome (PTLS) [duplication 17p11.2]. This study was designed to describe the growth characteristics of 24 subjects with PTLS from birth through age 5 years in conjunction with relevant physical features and swallow function studies.

Study design: We evaluated 24 individuals with PTLS who were ascertained by chromosome analysis and/or array comparative genome hybridization. Clinical assessments included review of medical records, physical examination, otolaryngological examination, and swallow function studies. Measures of height and weight were converted to Z-scores.

Results: The mean weight-for-age and weight-for-length Z-scores at birth were lower (P < .01) than the reference standard and did not change with age. A history of poor feeding, hypotonia, and FTT were reported in 92%, 88%, and 71%, respectively. Individuals with hypotonia had lower weight-for-age and body mass index-for-age Z-scores (P = .01). Swallow function studies demonstrated at least one abnormality in all subjects.

Conclusions: FTT is common in children with PTLS. We hypothesize that oropharyngeal dysphagia and hypotonia likely contribute to FTT in patients with PTLS and recommend that once a diagnosis is established, the individual be assessed for feeding and growth issues and be availed of oromotor therapy and nutritional services.


Figure 1
Figure 1
Distribution of Z-scores at birth in PTLS. Z-scores for individual patients with PTLS are plotted against the reference Z-score values for the general population.
Figure 2
Figure 2
Patient 2695 growth charts. Weight and length percentiles at birth were 25th percentile and 50th percentile, respectively. The arrows located in the weight for age chart indicates the time interval of approximately 9 weeks in which this patient received nasogastric tube feedings.

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