Iris vascular tumors are very unusual and tend to affect middle-aged and older adults. We report a case series of four adult patients with vascular alterations of the iris. Two patients were diagnosed with simple iris arteriovenous malformation (IAVM) and two with iris microhemangiomatosis (IM). Although the diagnosis is typically clinic, multimodal imaging techniques, especially anterior segment fluorescein angiography (AS-FA), anterior segment optical coherence tomography (AS-OCT), and optical coherence tomography angiography (OCT-A), improve the accuracy and delimitation of their attributes and extension. Differential diagnosis with angle or iris neovascularization, melanoma, and other iris vascular tumors is essential to avoid unnecessary tests and treatments.
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