Abnormal dental phenotypes in GAPO syndrome: A descriptive study with a new ANTXR1 variant & insights on teeth eruption

Objective

GAPO syndrome is usually diagnosed clinically owing to its characteristic features of growth retardation, alopecia, pseudoanodontia, and ophthalmic anomalies. Pseudoanodontia describes the failure of eruption of the two sets of teeth in these patients. Thus, the abnormal dental phenotype is the emergence of a set or part of a set of dentitions.

Purpose

This study reports the physical, oro-dental, and molecular findings of two new sibs with GAPO syndrome and provides a description of the dental phenotype of one of the patients reported before.

Materials & Methods

The patients were subjected to full medical history taking and three generations-pedigree construction. They were phenotyped according to the elements of morphology: Standard terminology series. After parental consents were acquired, molecular analysis was carried out for the two sibs (Patient 1 & 2).

Results

These included a new gene variant associated with erupted teeth in GAPO syndrome and new clinical features. A new classification for the terminologies of eruption disturbances was suggested.

Conclusion

The study asserts the importance of oro-dental examination and follow-ups as dental updates may occur in these cases.