Possibilities of OCT-angiography in the diagnosis of type 2 macular telangiectasias
A.V. TERESHCHENKO, I.G. TRIFANENKOVA, E.V. EROKHINA
Kaluga branch of the S. Fedorov Eye Microsurgery Federal State Institution, 5 Svyatoslav Fedorov Str., Kaluga, Russian Federation, 248007
Tereshchenko A.V. — D. Med. Sc., Director, tel. (4842) 505 767, e-mail: nauka@mntk.kaluga.ru
Trifanenkova I.G. — Cand. Med. Sc., Deputy Director for Research, tel. (4842) 505 767, e-mail: nauka@mntk.kaluga.ru
Erokhina E.V. — Head of the 2nd Diagnostic Department, tel. (4842) 505-767, e-mail: nauka@mntk.kaluga.ru
Earlier the gold standard for the diagnosis of type 2 retinal telangiectasias was fluorescent angiography. With the introduction of OCT-angiography into ophthalmologic practice, however, it became possible to study not only the superficial but also deep retinal vasculature without introducing contrast agents, and also to detect the presence of newly formed vascular anomalies at the level of the choroid and outer layers of the retina. The informative value of spectral optical coherence tomography using OCT-angiography was estimated for the diagnosing of type 2 telangiectasias. 18 patients (36 eyes) with type 2 macular telangiectasia were examined. Of these, 16 women and 2 men aged between 47 and 69 y.o. In addition to the standard ophthalmologic examination, including visometry, biomictroscopy of the anterior segment of the eye, direct and reverse ophthalmoscopy, all patients underwent photoregistration of the fundus and fluorescein angiography, as well as optical coherence tomography in the Angio-OCT regime.
Taking into account the ophthalmoscopic data and the degree of structural disorders of the retina, patients were divided into 5 groups according to the stages of the disease. Maximally corrected visual acuity in patients with retinal telangiectasias ranged from 1.0 to 0.01, depending on the stage and processes complicating the course of the disease.
OCT-angiography allowed to obtain high-quality images — angiograms, which helped to assess the condition of the microcirculatory channel of the retina at different levels, which was not possible with fluorescent angiography.
The use of OCT-angiography in the diagnosis of type 2 telangiectasias is most preferable, since this study is not invasive, but more informative than classical fluorescent angiography.
Key words: macular telangiectasias, OST-angiography, fluorescent angiography.
REFERENCES
- Gass J.D., Oyakawa R.T. Idiopathic juxtafoveolar retinal telangiectasis. Arch Ophthalmol, 1982, no. 100, pp. 769–780.
- Gass J.D., Blodi B.A. Idiopathic juxtafoveolar retinal telangiectasis: update of classification and follow-up study. Ophthalmology, 1993, 100, pp. 1536–1546.
- Yannuzzi L.A., Bardal A.M., Freund K.B. et al. Idiopathic macular telangiectasia. Arch Ophthalmol, 2006, no. 124, pp. 450–460.
- Wu L., Evans T., Arevalo J.F. Idiopathic macular telangiectasia type 2 (idiopathic juxtafoveolar retinal telangiectasis type 2A, Mac Tel 2). SurvOphthalmol, 2013, no. 58, pp. 536–559.
- Wong W.T., Forooghian F., Majumdar Z. et. al. Fundus autofluorescence in type 2 idiopathic macular telangiectasia: correlation with optical coherence tomography and microperimetry. Am J Ophthalmol, 2009, no. 148, pp. 573–583.
- Sallo F.B., Leung I., Clemons T.E. et. al. Multimodal imaging in type 2 idiopathic macular telangiectasia. Retina, 2015, no. 35, pp. 742–749.
- Spaide R.F., Jr Klancnik J.M., Cooney M.J. Retinal vascular layers imaged by fluorescein angiography and optical coherence tomography angiography. JAMA Ophthalmol, 2015, no. 133, pp. 45–50.
- Thorell M.R., Zhang Q., Huang Y. et al. Swept-source OCT angiography of macular telangiectasia type 2. Ophthalmic Surg Lasers Imaging Retina, 2014, no. 45, pp. 369–380.
- Zeimer M., Gutfleisch M., Heimes B. et. al. Association between changes in macular vasculature in optical coherence tomography- and fluorescein- angiography and distribution of macular pigment in type 2 idiopathic macular telangiectasia. Retina, 2015, no. 35, pp. 2307–2316.


