Tango and Thyroid

Well, I am off to Argentina in October to learn the tango, and have one of my thyroid cancer studies presented as an oral presentation at the International Thyroid Congress.
The LAC/Keck/USC Thyroid Cancer Group has a paper on the cancer marker thyroglobulin, TG. The study will look at the value of improved TG sensitivity in the long term followup of well differentiated papillary thyroid cancer.Some of our members are Carole Spencer, John Lopresti,and Peter Singer. On the way back, I stop in Dallas to attend the AACE's New advances in the use of Ultrasound for thyroid. This will include interventional ultrasound techniques.

Dr.G.

Thyroid Cancer Occuring with Graves' Disease. Is it More Aggressive?

At LAC/USC Thyroid Conference, a patient was presented and discussed, who had papillary thyroid Cancer and newly diagnosed Graves' Disease with hyperthyroidism. A paper from Italy was presented, and it claimed that the cancers were more aggressive in Graves' patients. I discussed my experience with this rare combination. My 5 cases were not more aggressive than the typical papillary cancer. No one of the experts present had more than one or two cases to talk about.Prior studies have not always agreed with the more aggressive concept.

What can you do to make sure your Graves' patient does not harbor a rare cancer as well?
Any palpable nodule needs ultrasound, I/123 imaging for cold nodules, and possible FNA biopsy. Ultrasound will find any non-palpable significant nodules, and it can help guide the needle into the mass.Significant nodules would be hypoechoic, irregular borders, vascular, and micro-calcifications. If the biopsy is suspicious or positive for cancer, than surgery will be the ideal therapy for both diseases. A rare medical "two for one". After a 4-6 week course of anti-thyroid drug therapy total thyroidectomy needs to be done.

Dr.G.

Thyroid Nodular Goiter in a Horse:Is it Cancer, or Just Too Much or Too Little Iodine?

I have treated two horses in my life with thyroid disease. In 1972, a physician friend ask me to look at her horse. It had recently been purchased, and was noted on arrival to have an enlarged thyroid gland. I felt a 3-4 times enlarged nodular goiter.The blood testing of T4 was very low. I first thought the horse was hypothyroid, but after consultation with vet endocrine experts, I was told the horse's total T4 thyroid blood test will seem low by human standards, but the free T4 will be normal. The most likely cause was either a benign tumor, or enlargement secondary to either excess iodine in supplements, or iodine deficiency. There was no use of iodine supplements, so I diagnosed iodine deficiency.
Iodine salt lick was added to the horses diet, and the goiter markedly reduced in size.
The second horse had a large nodule, and after ultrasound studies , it was not consistent with a follicular tumor which is common in horses, but was more likely to be part of a diffuse goiter with a nodule. This time the owner did use kelp supplements,
which contained large amounts of iodine. Fortunately, with removal of the kelp, the nodular goiter reduced in size. Cancer of the thyroid is rare in horses.

Even horses can develop a goiter from excess or deficient iodine in their diet.
Humans in the USA, have a higher chance to develop excess iodine goiter from supplements, as iodine deficiency is rare in the USA.

My daughter's horse, Casey, does not have a goiter, thank God, or I would have had to treat my third horse in 31 years!

I will stick to human thyroid disease, as horses can not tell me what bothers them.

Dr.G.