First follow-up appointment in Mesa

I had my first follow-up appointment yesterday, Friday, with the retinal specialist here in Arizona, Dr. DeSouza. I described to them the changes in vision I've noticed in my left eye, as well as the changes in the bright flashes of light that I described in a previous post. I also told them that when I'm looking at the computer screen, for example, and take turns closing my right then left eye, not only is everything blurry with my left eye, but also the letters on the screen are about half as big as they look with my good eye. Apparently I'm now temporarily near-sighted in the left eye.

The fact that the flashes that I've been seeing have become much more frequent and more intense means that there's more pressure on the retina. A side effect of the surgery and radiation that is going on in my eye is macular edema, which means there's swelling caused by an accumulation of fluid around the area of my macula. From previous images I've posted you could see a pocket of fluid immediately next to my tumor. Now there's even more fluid there. If the amount of pressure underneath that part of my retina gets too high, there's a potential that it could lead to either tearing of the retina, which would suck, or it could lead to even more of the retina becoming detached, which would also suck.

This is an image from an Ocular Coherence Tomography test that measured the thickness of my retina. OD (oculus dexter) means my right eye. OS (oculus sinister) means my left eye. I find it interesting that my "sinister" eye is the one that gave me cancer (haha). This test was only taking measurements over a total length of 6 mm, the approximate diameter of the macula. You can see the dip in the center, which is the fovea, the thinnest part of the macula. You can also see that in my bad eye, the whole thing is just taller, due to the fluid building up underneath. On the right edge of the image from the left eye, you can see the edge of the tumor.

Here's another image showing the data from a top-view. The little colorbar down below describes what thickness each color represents (measured in micrometers). The fact that my macula is not only raised, but also warped, explains why I can't focus on things with that eye.

So what can be done about this macular edema? Eventually it may go away on it's own, but it could take around a year to do so. With the risk of further damage to my retina, the doctor wanted to intervene. There's this drug called Avastin (bevacizumab), which was originally approved by the FDA to treat colorectal cancer. It's now used for some other cancers as well, like lung cancer. It's actually not what you might think of when you think of a drug; instead, it's a purified monoclonal antibody that binds to a molecule called VEGF (vascular endothelial growth factor), something that is needed for the formation of new blood vessels.

While it's not approved by the FDA for use in the eye, Avastin also helps with macular degeneration and macular edema. Interestingly, the drug company Genentech has a very similar drug called Lucentis which is FDA approved for treating disorders of the macula, but it costs about 40 times more (~$1600-2000 per dose). Genentech tried to keep doctors from using the cheaper drug to treat this eye condition so that they would instead have to use the very similar, but much more expensive drug. Luckily the eye doctors fought back really hard and are now still able to use Avastin to help save people's vision.

Anyway, to treat other cancers with Avastin, you would get a systemic injection, right into the arm like a normal injection. To help in the eye, however, Avastin needs to be injected....right....into....the eye, an intravitreal injection. I told the doctor that if this would entail numbing the back of my eye, I would have to punch him. While this injection wasn't nearly as bad as the one that caused my vasovagal reaction, it still wasn't an awesome thing to get.

They numbed the surface of my eye with some anesthetic gel for a while, disinfected the skin around my eye with Betadine (that orangey-colored stuff), then they also had to put a diluted Betadine solution into my eye. While I can appreciate the need to keep any sort of infection out of the inside of my eyeball, the Betadine was really uncomfortable once the numbing stuff wore off. It felt like my eye was slightly on fire for the rest of that day, right up until I went to sleep. Luckily it felt fine when I woke up.

So after the Betadine in the eye, the doctor injected some Dexamethasone (anti-inflammatory steroid) and Avastin into the eye, with two different injections. He did this just on the upper-left side of my iris. I felt only a mild-medium prick with each needle, otherwise it just felt weird knowing that there was a needle going directly into my eye. Then they flushed the surface of my eye out for a long while with saline to try to get all of the Betadine out. Despite about 5 minutes of flushing, it still burned for the rest of the day. It also made that eye water heavily for several hours, and messed with my sinuses (stuffy yet runny left nostril) for the rest of the day.

So now I'm back to two eyedrops (an antibiotic and a steroid) four times a day for the next four days. Yes, Angel still has to put them in for me! ;) The steroid drop is a milky-looking drop, and the weird thing about it is that it leaves a pretty gross taste in the back of my throat. Some of the drug must make it all through my sinuses and into my throat. I also have another follow-up in a month to see if some of the swelling has improved.

A few other random tidbits:

1. According to the American Cancer Society, eye cancers in general are by far the most rare type of cancer I could have possibly gotten. Out of the 1,529,560 estimated new cases of cancer in the US this year, only 2,480 of them will be some type of eye cancer (0.16% of all cancers). About 1,800 of those will be a choroidal melanoma (0.12% of all cancers). By comparison, breast cancer will account for about 209,060 new cancer diagnoses this year (13.67% of all cancers).

2. I've always had this thought, but it's gotten a lot stronger recently. Having had to deal with a cancer that I did nothing at all to earn, I can't help but wonder about the sanity of people who choose to do things that are absolutely known to cause cancer. I'll never understand that type of idiocy. Why would you purposefully bring that on yourself?

3. I've been taking that herbal supplement that I mentioned before (Essiac tea) for a little while now. It's only 4 ounces of tea for each dose, but it tastes pretty gross, and it's hard to get it down.