So alas, I am once again in the position of being a medical mystery… Now, I love a murder mystery, preferably an Agatha Christie. But the only medical mystery show I’ve ever watched was House M.D., in which the patients invariably had to almost die before their doctors worked out that they did not, in fact, have lupus. I’m not so keen on the near-death approach to diagnosis, if I’m honest.
So back in early April, I re-started my medication (cabergoline). I had stopped it in late pregnancy in the hope of breastfeeding, but the symptoms of my TSHoma tumour returned after a few months, so I had to start taking it again.
As per usual, the doctors wanted to monitor my thyroid levels. My tumour produces Thyroid Stimulating Hormone (TSH – hence why it’s called a TSHoma), which causes my thyroid gland to over-produce thyroid hormones. So as the medication works, you would expect my TSH levels to reduce, and my thyroid hormone levels to reduce too.
Because my health issues relate to the endocrine system, all the twists and turns of this mystery thriller basically just involve different blood test results. For some reason no major TV networks have shown interest in picking up a pilot based on this concept.
So: my TSH levels have indeed been reducing since re-starting my medication. But my thyroid hormone levels have actually been increasing. Quite a lot. I now have thyroid levels way above the normal range. This makes no sense if the high thyroid levels are caused by the pituitary tumour.
Cue dramatic music. Dr House gives the camera a quizzical look.
Interchangeable Hot Younger Doctor 1: “Could it be lupus?”
Instead, it looks as though something else is causing the raised thyroid levels. This could potentially be a thyroid condition like Graves Disease, which is an autoimmune illness that causes the body to over produce thyroid hormone, or potentially a growth on my thyroid gland itself. We don’t know. At first, I think the doctors hoped it was just a weird blip on my blood test results, but repeat testing has shown the same pattern.
So my doctors have put me on a higher dose of cabergoline, to make sure that the TSHoma tumour on my pituitary gland is definitely being treated, and ordered some more blood tests to see if it could be Graves Disease. I’m hoping to hear from them this week to find out what we know and what other testing needs to be done. I’m guessing they’ll want to rule out lupus.
A quick search online shows there are only four known cases ever of someone with my condition (TSHoma) also having Graves Disease. One of the trickiest things when you have such a rare condition is that when something out of the ordinary like this happens, you’re just flying blind. No-one really knows what’s going on. Sadly, it seems unlikely that a grizzled, curmudgeonly doctor will reveal he’s known what’s going on the whole time and has just been holding the information back for 50 minutes in order to build dramatic tension.
So please keep your fingers crossed for me, and I’ll update you as soon as we start to unravel this medical mystery…