RETINAL ASTROCYTIC HAMARTOMA: Optical Coherence Tomography Classification and Correlation With Tuberous Sclerosis...

Area of Science:

• Ophthalmology
• Genetics
• Neurology

Background:

• Tuberous sclerosis complex (TSC) is a genetic disorder causing benign tumor growth in multiple organs.
• Retinal astrocytic hamartomas are common ocular manifestations of TSC.
• Accurate classification and understanding of these hamartomas are crucial for patient management.

Purpose of the Study:

• To propose a novel classification system for retinal astrocytic hamartomas.
• To utilize spectral domain optical coherence tomography (SD-OCT) for this classification.
• To correlate each classified type with specific systemic manifestations of TSC.

Main Methods:

• Retrospective chart review of 43 TSC patients from four international centers.
• Documentation of clinical and SD-OCT features of retinal astrocytic hamartomas.
• Statistical analysis to correlate hamartoma types with systemic TSC features.

Main Results:

• A four-type classification (Type I-IV) of retinal astrocytic hamartomas was established.
• Type II hamartomas correlated significantly with cutaneous fibrous plaques (OR=64.8).
• Type III hamartomas showed a strong association with subependymal giant-cell astrocytomas (OR=43.2).
• Type IV hamartomas were linked to pulmonary lymphangiomyomatosis (OR=126).

Conclusions:

• Retinal astrocytic hamartomas exhibit distinct morphologic patterns on SD-OCT.
• This classification provides a framework for understanding TSC manifestations.
• The proposed classification aids in predicting and managing systemic complications of TSC.