[Indocyanine green angiography in the diagnostics of choroidal tumors].

Purpose: To study the use of ultrasound color Doppler imaging and indocyanine green (ICG) angiography for identification of malignant vasculature of choroidal tumors.

Material And Methods: The study included 46 patients (46 eyes) with tumors of the choroid: 19 men and 26 women aged 22 to 89 years, average age 53.2±17.1 years. All patients underwent indocyanine green angiography and Doppler ultrasound imaging. At the time of examination, thickness of the tumors ranged from 1.1 mm to 3.0 mm, and the base diameter from 4.0 mm to 13.0 mm. Choroidal melanoma was diagnosed in 27 patients, choroidal nevus in 10, choroidal hemangioma in 5, and choroidal metastasis in 4 patients.

Results: The results of indocyanine green angiography demonstrate that the pathological malignant vasculature was determined: nevi was diagnosed in 7 out of 10 patients, choroidal melanoma in 16 out of 27, metastasis in 2 out of 4, and hemangioma in none of the 5 patients. Pathological malignant vasculature was determined in most patients with choroidal melanoma (77.8%), in all patients with choroidal hemangioma and in 3 patients with choroidal metastases. Ultrasound imaging revealed malignant vasculature in 15 of 27 (56%) patients with choroidal melanoma, it could be identified in all patients with hemangioma in 2 patients and with choroidal metastases, and in none patients with choroidal nevi.

Conclusions: Indocyanine green angiography helps verify malignant vasculature in 77.8% of patients with small and medium sized choroidal melanomas. Angioarchitecture of choroidal tumors visualized with indocyanine green angiography is characterized by variability of patterns, which should be taken into account in the differential diagnosis of various pathological diseases.