OPD Syndrome         
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The oto-palato-digital syndrome: variable clinical

Zaytoun GM, Harboyan G, Kabalan W.

Department of Otolaryngology-Head and Neck Surgery, American University of Beirut School of
Medicine and Medical Center, Makassed General Hospital, Lebanon. gzaytoun@cyberia.net.lb

The oto-palato-digital (OPD) syndrome is a rare but well-defined disorder characterized by a
skeletal dysplasia of the hands and feet, hearing loss, and anomalies of the palate. Since it was first
described by Taybi in 1962, a little over 30 cases have been reported in the literature. A more
lethal variant of the syndrome was described later by Fitch and was termed OPD type II. Several
studies were conducted to determine the exact mode of inheritance of this syndrome, whereas
others have focused on the characterization of the skeletal anomalies and their variations.
Otologists were interested in determining the etiology of the associated hearing loss. We report 4
cases of patients with the spectrum of anomalies that characterize the OPD syndrome. These
patients include 3 siblings and 1 unrelated patient who presented to our service complaining of
hearing loss. The skeletal anomalies, special features, and audiologic findings are described and
compared with those in previously reported cases. A discussion based on a literature review of the
mode of inheritance, of variation in the clinical expression, and of the etiology of hearing loss is also
included. Finally, we review and discuss the subdivision of this syndrome into the 2 types (I and II).

PMID: 11870342 [PubMed - indexed for MEDLINE]