Vascular Tortuosity Type Correlates with Specific Infections, Clinical Features in Retinal Vasculitis

This study found that in patients with retinal vasculitis, venous tortuosity improved after inflammation was controlled, whereas arterial tortuosity remained unchanged. According to the researchers, this suggests “vascular remodeling may follow different temporal dynamics depending on the vessel type.” Above are clinical images from the study: fundus photography and FA illustrating arterial tortuosity (A, B), venous tortuosity (C, D) and both arterial and venous tortuosity (E, F). Photos G and H show changes of both arterial and venous tortuosity after inflammation control. Photo: Zhang X, et al. J Ophthal Inflamm Infect. October 1, 2025. Click image to enlarge. A prominent clinical feature of retinal vasculitis—often associated with immune-mediated disorders, infections and malignancies—is vascular tortuosity. This abnormal twisting of blood vessels often arises as a consequence of the inflammatory processes inherent to the condition and can serve as an indicator of underlying pathology and disease severity. A small study recently observed this clinical manifestation in roughly a quarter of patients with retinal vasculitis and identified differences in infectious etiologies, clinical features and recovery times between various types of vascular tortuosity. Published in Journal of Ophthalmic Inflammation and Infection, the study retrospectively reviewed medical records from 135 patients diagnosed with retinal vasculitis at a medical institution over a two-year period. Retinal vascular tortuosity was assessed via fundus photography and fluorescein angiography, with patients classified into categories based on the type of tortuosity observed—arterial, venous or both. Logistics regression analysis was employed to evaluate the association between tortuosity and various clinical factors, including viral infections and autoimmune conditions.The results indicated that 37 patients (27.4%) exhibited retinal vascular tortuosity, with 24 presenting arterial tortuosity, five with venous tortuosity and eight with both. Arterial tortuosity was significantly associated with the presence of posterior synechiae (odds ratio: 2.77), while venous tortuosity was predominantly noted in patients with birdshot chorioretinopathy (odds ratio: 16.00). Vascular tortuosity also showed a correlation with viral infections and other inflammatory conditions, including toxoplasmosis and psoriasis.The mean recovery time for arterial tortuosity was 5.3 ± 8.9 months, while venous tortuosity resolved in an average of 16 ± 15.0 months. In patients exhibiting both arterial and venous tortuosity, the latter improved in 7.3 ± 7.1 months on average, which the authors attributed to “the normalization of blood flow and reduced vessel wall stress.” Interestingly, however, arterial tortuosity continued to persist beyond 24 months in these patients, highlighting the distinct behavior of these vascular changes in response to inflammation. “The prolonged persistence of arterial tortuosity could be attributed to structural differences in the vascular wall or variations in hemodynamic stress responses between arteries and veins,” the authors explained in their study. They suggested, “Further longitudinal studies with larger cohorts are warranted to better characterize these patterns and to understand the underlying mechanisms driving differential recovery timelines.”Given that retinal vascular tortuosity was prevalent in patients with retinal vasculitis and associated with specific infectious etiologies and clinical features, the researchers suggest its potential role as a prognostic marker that could aid in assessing disease severity and informing treatment strategies.Click here for the journal source. Zhang X, Anover FA, Hung JH, et al. The relationship between retinal vascular tortuosity and retinal vasculitis. J Ophthal Inflamm Infect. October 1, 2025. [Epub ahead of print].  This article was developed by the editorial staff in conjunction with experts in the field. In the process, AI may have been among the editorial tools used to meet the goals of human editors, who approved all content.