Phenotypic characterization of epibulbar dermoids.

Area of Science:

• Ophthalmology
• Pediatric Oncology
• Congenital Anomalies

Background:

• Epibulbar dermoids (EpDs) are the most common congenital eye tumors in children.
• Understanding their presentation and outcomes is crucial for diagnosis and management.

Purpose of the Study:

• To characterize the phenotypic presentation, clinical course, and outcomes of epibulbar dermoids (EpDs).
• To compare EpDs in isolation versus those associated with craniofacial microsomia (CFM) and other congenital anomalies.

Main Methods:

• Retrospective electronic medical record review of 48 patients with 68 EpDs at Seattle Children's Hospital (1981-2014).
• Patients categorized into EpD-Only, EpD-CFM, and EpD-Other groups.
• Analysis of tumor characteristics, associated anomalies, surgical interventions, and outcomes.

Main Results:

• EpD-CFM cases showed higher rates of multiple or bilateral EpDs compared to EpD-Only.
• Surgery was more frequent and occurred at a younger age in the EpD-CFM group.
• Commonly associated anomalies included preauricular tags, congenital heart defects, and genitourinary/nervous system issues.
• While EpD location/type were similar, EpD-Only cases presented a less complex phenotype.

Conclusions:

• EpDs associated with CFM exhibit a more complex phenotype than isolated EpDs.
• These findings suggest distinct underlying mechanisms or developmental pathways for EpDs in isolation versus syndromic cases.
• Further research is needed to fully elucidate these phenotypic differences and long-term outcomes.