**7. OCTA in retinal and choroidal tumors**

OCTA is an evolving technology that can be useful in the study of posterior segment tumors. The choroidal nevi are mainly seen as heterogenic and hyperreflective lesions. When studying melanocytic tumors, the higher risk of malignancy (choroidal melanoma) is associated with the presence of parilesional hyporeflective plexus or hyperreflective ring (in the choriocapillaris layer) [22] (**Figure 13**).

#### **Figure 13.**

*OCTA of choroidal metastasis, choriocapillaris slab shows significant loss of its' classically mottled appearance, there are areas void of signal indicating tumor invasion of the blood vessel. The b scan showed a classic bumpy appearance with smooth elevation and visible subretinal fluid.*
