FYI - The metallosis was responsible for the hyperthyroidism. No one believed it at the time, but it was later proven to be the case after dozens of MoM hip implant patients experienced the same thing, and had it end as metal left their bodies after revision surgery (or surgeries in my case - I had two MoM hips.)
Once I had revision surgery and the metal ions worked their way out of my body, my thyroid normalized. Nobody recognized the thyroid issue until after the hip revision surgery, when I spiked a fever and high heart rate. This was crazy because I had all the signs and symptoms - fast heart rate, PVC's, tremor, weight loss, fatigue, hair loss... The surgeon ignored all pages, my RN daughters hounded the nurses until they called the hospitalist in and she recognized it as an impending thyroid storm - the next hospitalist on rotation in the morning looked up my history of thyroid nodules (he was my previous PCP) and started meds immediately.
I was lucky to be in a first rate hospital with experienced, awesome staff hospitalists or my outcome may have been much different.