Primary stromal choroiditis

Summary Optimal outcome measures are necessary to monitor adequately the diverse uveitis entities and follow-up modalities should be tailored according to the disease process. Stromal choroiditis entities are diseases predominantly involving the choroidal stroma, such as Vogt-Koyanagi-Harada disease (VKH) and birdshot retinochoroiditis (BRC), both considered as primary stromal choroiditis because the disease process starts within the stroma of the choroid. Sarcoidosis and tuberculous chorioretinitis are considered as secondary choroiditis, as the choroid is the innocent bystander structure where a systemic disease causes lesions Consequently a follow-up modality capable of optimally evaluating this structure should be privileged in the assessement at presentation and for monitoring disease evolution. Among imaging modalities, the ones best accounting for choroidal stromal involvement are indocyanine green angiography (ICGA) and measurement of choroidal thickness by enhanced depth imaging optical coherence tomography (EDI-OCT). ICGA is more suited for acute and subacute stages of disease, while EDI-OCT useful to follow medium and long-term evolution. The precision obtained with these modalities will be demonsrated.