Case #9 – AV Malformation (AVM)

AV Malformation (AVM) – Page 12 of 22

Follow-up of the vein occlusion patient from previous page: The BCVA was 20/30 OD and 20/15 OS. Ophthalmoscopy revealed large cups due to glaucoma OU and an epiretinal membrane 0D>0S. The vein occlusions OD appear to be resolving quite well but the patient is still symptomatic in the right eye. He complains about persistent

AV Malformation (AVM) – Page 12 of 222021-11-30T22:23:54+00:00

AV Malformation (AVM) – Page 11 of 22

Image Gallery - Vein Occlusions The images above are from a patient who had a CRV occlusion OS more than two decades ago and a recent inferior hemi-central retinal vein occlusion OD. An additional superior nasal vein occlusion months earlier gives the appearance of a 3 quadrant vein occlusion OD.(See Case 5- Vein Occlusion)

AV Malformation (AVM) – Page 11 of 222021-11-30T22:22:39+00:00

AV Malformation (AVM) – Page 10 of 22

Figure A - Composite view of the right eye. Figure B - Magnified view of right eye. Figure C - Magnified view of right eye using the green separation. Asymptomatic 36 year old female presented with a far peripheral anastomosis in the right eye temporally (as well as a small hemorrage above the AV abnormality).

AV Malformation (AVM) – Page 10 of 222021-11-30T22:23:45+00:00

AV Malformation (AVM) – Page 9 of 22

20 year old female presented with uni-ocular AV malformation in the inferior retina OS. In addition to the retinal AV malformation, the patient had multiple AVMs near the hypothalamus, and thus far has undergone two major neurosurgical procedures to close some of the abnormal vessels. Blood "pools" in large AVMs and "steals" blood

AV Malformation (AVM) – Page 9 of 222021-11-30T22:23:37+00:00

AV Malformation (AVM) – Page 4 of 22

As depicted in the horizontal sections above, the PIL is present and normal under the fovea in each eye. In vein occlusions1 as well as other retinal abnormalities, the VA can often be predicted based upon the status of the PIL.2 In this case, the normal PIL predicts the 20/20 VA in each eye.

AV Malformation (AVM) – Page 4 of 222021-11-30T22:23:10+00:00

AV Malformation (AVM) – Page 3 of 22

The green box is 6 mm x 6 mm and contains 128 horizontal sections. The retina is elevated around the AV malformation. “Shadowing" of deeper structures prevent detailed assessment of the PIL and other layers. When both the PIL and RPE are not present, no conclusion can be reached about the integrity of

AV Malformation (AVM) – Page 3 of 222021-11-30T22:23:04+00:00