40 Y/O F with a diagnosis of TBG deficency since age 16. She was noted by an endocrinologist, to have a small goiter then. No therapy was directed toward the goiter. Over the next 20+ years the patient was treated with thyroxine, T3, Triac,
Armour thyroid, and large amounts of iodine containing supplements. She had multiple CT scans with iodine contrast.The low Total T4 confused the physicians, into treating her for hypothyroidism. Her usual thyroid tests were compatible with low TBG.
The low Total T4, and normal TSH resulted in several CT scans of the head looking for a pituitary tumor. Iodine contrast dye for these tests resulted in iodine induced hyperthyroidism. However,there were other periods of hyperthyroidism caused by her large iodine intake. 2 years ago, a thyroid scan showed high iodine uptake and multiple hot nodules on scanning. There was multiple FNA biopsies of the 10 + nodules seen on ultrasound. They were all benign. She tried Wilson's Syndrome, an unproven, and dangerous T3 therapy Rxed by a physician, that put her in the emergency room with T3 induced rapid heart beats. Finally, she saw me for a consultation. She had a multinodular goiter with 4 autonomous hot nodules, on repeat thyroid scan, which were ripe for induction to hyperthyroidism with introduction of excess iodine. She had "normal" total T4 and suppressed TSH which in TBG deficiency, meant she was hyperthyroid. She is now off all thyroid preparations, and clean of supplement iodine, and is about to be treated with radioactive iodine to ablate the pre-toxic autonomous nodules in her goiter.
Key to case.
Hot nodules on seen on scan can be induced to over produce T4 when presented with excess iodine, and will surely become hyperthyroid if put on thyroid hormone.
Rare Low TBG is not a disease, and has no effects on the patient, but it can mask real disease, and in some cases cause unnecessary treatment for hypothyroidism.
Rare high TBG can cause the opposite effect. In 30 years I have stopped 2 patients from therapy for hyperthyroidism, who had excess TBG. They had high Total T4, a simple goiter, and were not toxic hyperthyroid.
Until the next thyroid rounds,
Dr.G.
Monday, March 26, 2007
Missed Thyroid Diagnosis Due to Confusion Caused by Thyroxine Binding Protien Deficency, Hypo-TBG -emia.
40 Y/O F with a diagnosis of TBG deficency since age 16. She was noted by an endocrinologist, to have a small goiter then. No therapy was directed toward the goiter. Over the next 20+ years the patient was treated with thyroxine, T3, Triac,
Armour thyroid, and hugh amounts of iodine contaning supplements. She had multiple CT scan with iodine contrast.The low Total T4 confused the physicians, in her being treated for hypothyroidism. Her usual thyroid tests were compatible with TBG deficency.
The low Total T4, and normal TSH resulted in several CT scans of the head looking for a pituitary tumor. Iodine contrast dye for these tests resulted in hyperthyroidism.
However, there were other periods of hyperthyroidism caused by her large iodine intake.
2 years ago a thyroid scan showed high uptake and multiple hot areas on scanning.
There was multiple FNA biopsies of the 10 + nodules seen on ultrasound. They were all benign. She tried Wilson's Syndrome T3 therapy that put her in the emergency room with T3 induced rapid heart beats. Finally, she saw me for a consultation. she had multinodular with autonomous hot nodules which were ripe for induction to hyperthyroidism with introduction of excess iodine. She had "normal" total T4 and suppressed TSH which in TBG deficiency meant she was hyperthyroid.She is now off all
thyroid preparations, and clean of supplement iodine, and is about to be treated with radioiodine to ablate the toxic nodules in her goiter.
Key to case.
Hot nodules on scan can be induced to over produce T4 when presented with excess iodine, and will surely become hyperthyroid if put on thyroid hormone.
Untill the next thyrroid rounds,
Dr.G.
Armour thyroid, and hugh amounts of iodine contaning supplements. She had multiple CT scan with iodine contrast.The low Total T4 confused the physicians, in her being treated for hypothyroidism. Her usual thyroid tests were compatible with TBG deficency.
The low Total T4, and normal TSH resulted in several CT scans of the head looking for a pituitary tumor. Iodine contrast dye for these tests resulted in hyperthyroidism.
However, there were other periods of hyperthyroidism caused by her large iodine intake.
2 years ago a thyroid scan showed high uptake and multiple hot areas on scanning.
There was multiple FNA biopsies of the 10 + nodules seen on ultrasound. They were all benign. She tried Wilson's Syndrome T3 therapy that put her in the emergency room with T3 induced rapid heart beats. Finally, she saw me for a consultation. she had multinodular with autonomous hot nodules which were ripe for induction to hyperthyroidism with introduction of excess iodine. She had "normal" total T4 and suppressed TSH which in TBG deficiency meant she was hyperthyroid.She is now off all
thyroid preparations, and clean of supplement iodine, and is about to be treated with radioiodine to ablate the toxic nodules in her goiter.
Key to case.
Hot nodules on scan can be induced to over produce T4 when presented with excess iodine, and will surely become hyperthyroid if put on thyroid hormone.
Untill the next thyrroid rounds,
Dr.G.
Friday, March 23, 2007
Rare TBG Deficiency Confuses Physicians, and They Miss Her Real Thyroid Problem.
40 Y/O F with 24 year history of decreased TBG. This rare harmless defect, should not mask other thyroid disorders. Her initial exam revealed a goiter. Nothing was done until testing confirmed a multinodular R>L. She had periods of transient hyperthyroidism after iodine supplements for a CT cscan, or kelp liquid drops, or even low dose thyroid hormone. She had multiple suppressed TSH values, off or on Thyroid hormone therapy. Over the counter Triac, caused Hyperthyroidism. The goiteer and all the nodules continued to grow. The total T4 is always low in TBG deficiency.
However hyperthyroidism exists when the total T4 is normal or high with suppressed TSH. A 6/24 Hour uptake and scan was abnormal. The uptake was high, and the scan showed hot nodules. The diagnosis of Toxic Nodular Goiter with masking effects of TBG deficiency was made, and after multiple benign FNA samples, under US guidence, it was elected to treat with RAI/131.
Clues included normal TT4 with suppressed TSH. The TT4 is always low in TBG deficiency.
Radioiodine 131 was used to control the thyrotoxicosis
However hyperthyroidism exists when the total T4 is normal or high with suppressed TSH. A 6/24 Hour uptake and scan was abnormal. The uptake was high, and the scan showed hot nodules. The diagnosis of Toxic Nodular Goiter with masking effects of TBG deficiency was made, and after multiple benign FNA samples, under US guidence, it was elected to treat with RAI/131.
Clues included normal TT4 with suppressed TSH. The TT4 is always low in TBG deficiency.
Radioiodine 131 was used to control the thyrotoxicosis
Thursday, March 15, 2007
Seaweed Goiter, or How I Grew My Thyroid While Ingesting Large Amounts Kelp
50 Y/O F had a small nodule 6 years ago which was biopsied and told it was benign. She refused thyroid hormone suppression, and when it continued to grow, she even refused surgery. She treated the goiter nodule with her own home plan as suggested by the internet.If you have thyroid problems,it stated, take iodine supplements.She did that for the next 5 years as the nodular goiter continued to grow! She had multiple biopsies and she claimed that biopsies caused the goiter to grew. She finally saw me last week. She is euthyroid with a large bilateral goiter with her trachea moved to one side to make room for the larger right lobe. The US showed another big nodule on the other lobe. Now she needs to stop the iodine supplements, and Kelp, and have yet another biopsy of the new nodule.
What did she learn?
Iodine is not only not good for goiters in the USA, because we have enough iodine in our diet, but it can be down right harmful.
Do Not Take Iodine Supplements without being informed of the dangers if you have a goiter, Hashimoto's thyroiditis, or nodules.
See you next time on Thyroid Rounds at Santa Monica Thyroid Center,
Good Day,
Dr.G.
What did she learn?
Iodine is not only not good for goiters in the USA, because we have enough iodine in our diet, but it can be down right harmful.
Do Not Take Iodine Supplements without being informed of the dangers if you have a goiter, Hashimoto's thyroiditis, or nodules.
See you next time on Thyroid Rounds at Santa Monica Thyroid Center,
Good Day,
Dr.G.
A Rare Cure of Medullary Thyroid Cancer ???
This is a follow up of the patient with MCT, who had the best chance for cure.
After a 6 hour surgery, and total removal of the thyroid, central compartment nodes, and right and left neck node removal, he had a post op calcitonin on <2, N<2.
Is this a cure? Time will tell as there is 0.0-0.19 under the curve. I am hopeful his calcitonin will remain undetectable in the future. The surgeon operated for 6 hours to remove all the nodes and the thyroid gland. Yearly neck lymph node real time ultrasound, and calcitonin cancer marker testing will needed for years to finally answer the cure question.
Bravo!
See you next time on rounds at the Santa Monica thyroid Center.
Good Day,
Dr.G.
After a 6 hour surgery, and total removal of the thyroid, central compartment nodes, and right and left neck node removal, he had a post op calcitonin on <2, N<2.
Is this a cure? Time will tell as there is 0.0-0.19 under the curve. I am hopeful his calcitonin will remain undetectable in the future. The surgeon operated for 6 hours to remove all the nodes and the thyroid gland. Yearly neck lymph node real time ultrasound, and calcitonin cancer marker testing will needed for years to finally answer the cure question.
Bravo!
See you next time on rounds at the Santa Monica thyroid Center.
Good Day,
Dr.G.
Acute Leukemia and MCT, Medullary Thyroid Cancer
One year ago I saw a a 60 Y/O M with a thyroid nodule. He was in remission from Leukemia, and wanted to explore the reason for the nodule. He had only Chemotherapy.
No External beam radiotherapy.The USGFNA was consistent with MCT. The pre-op calcitonin was about 1000 N <2. There was nodes in the central compartment, and down into the upper chest. USGFNA of lateral neck nodes was negative for cytology and calcitonin washings. The DNA studies confirmed sporadic, not family MCT. He had extensive surgery. The total thyroid was removed, as well as a node removal down into the upper chest by opening the chest. Both lateral neck node compartments were negative. Post op calcitonin was 40. He had worse problems with a recurrence of the leukemia. One year later after another remission and 4 weeks after the last round of chemotherapy, he presented himself in my office with a calcitonin of 81. The lymph node mapping of his neck was positive for abnormal shaped nodes on both sides. USGFNA of nodes in 4 lateral neck compartment was negative! Hunting for the Calcitonin rise, I did a thin slice PET/CT. The liver was PET/CT negative. He had nodes everywhere, but only one was PET positive. It was in a difficult position for FNA, and only 11 mm in size. I was able to due the biopsy, and show it was the probable source of the calcitonin rise. The surgeon was worried about finding the node group at the time of surgery. One hour before surgery, I injected 1% methylene blue dye on the anterior surface of the node to help in localization. There were smaller nodes near the PET positive one. The surgeon removed 3/12 nodes that were positive.The recovery was uneventful, and the calcitonin post op was 35.
What did we learn?
1. The prior leukemia caused generalized inflammation of nodes throughout his body, confusing me as to the initial place for USGFNA of nodes. The PET/CT was able to find the active MCT cancer node, and the CT slice number allowed us to find the right node to biopsy.
2. Calcitonin washings of the needle after smearing for cytology was the best way to diagnose lymph node mets from MCT.
3. Though MCT is more likely to cause death,than Papillary thyroid cancer, finding early recurrences before they spread to the liver can prolong life.
4.All areas of node surgery in the initial surgery were clear except the very posterior positive node found in Level IIb.
5. The best chance for survival and even cure is a radical surgery with removal of the thyroid, the central nodes and right and left lateral node compartments.
6. The surgeon must be expert in this type of surgery. I sent the patient to a world expert in Houston Texas at MD Anderson Cancer Center.
Until next time on thyroid rounds, at the Santa Monica Thyroid Center,
Good Day,
Dr.G.
No External beam radiotherapy.The USGFNA was consistent with MCT. The pre-op calcitonin was about 1000 N <2. There was nodes in the central compartment, and down into the upper chest. USGFNA of lateral neck nodes was negative for cytology and calcitonin washings. The DNA studies confirmed sporadic, not family MCT. He had extensive surgery. The total thyroid was removed, as well as a node removal down into the upper chest by opening the chest. Both lateral neck node compartments were negative. Post op calcitonin was 40. He had worse problems with a recurrence of the leukemia. One year later after another remission and 4 weeks after the last round of chemotherapy, he presented himself in my office with a calcitonin of 81. The lymph node mapping of his neck was positive for abnormal shaped nodes on both sides. USGFNA of nodes in 4 lateral neck compartment was negative! Hunting for the Calcitonin rise, I did a thin slice PET/CT. The liver was PET/CT negative. He had nodes everywhere, but only one was PET positive. It was in a difficult position for FNA, and only 11 mm in size. I was able to due the biopsy, and show it was the probable source of the calcitonin rise. The surgeon was worried about finding the node group at the time of surgery. One hour before surgery, I injected 1% methylene blue dye on the anterior surface of the node to help in localization. There were smaller nodes near the PET positive one. The surgeon removed 3/12 nodes that were positive.The recovery was uneventful, and the calcitonin post op was 35.
What did we learn?
1. The prior leukemia caused generalized inflammation of nodes throughout his body, confusing me as to the initial place for USGFNA of nodes. The PET/CT was able to find the active MCT cancer node, and the CT slice number allowed us to find the right node to biopsy.
2. Calcitonin washings of the needle after smearing for cytology was the best way to diagnose lymph node mets from MCT.
3. Though MCT is more likely to cause death,than Papillary thyroid cancer, finding early recurrences before they spread to the liver can prolong life.
4.All areas of node surgery in the initial surgery were clear except the very posterior positive node found in Level IIb.
5. The best chance for survival and even cure is a radical surgery with removal of the thyroid, the central nodes and right and left lateral node compartments.
6. The surgeon must be expert in this type of surgery. I sent the patient to a world expert in Houston Texas at MD Anderson Cancer Center.
Until next time on thyroid rounds, at the Santa Monica Thyroid Center,
Good Day,
Dr.G.
Thursday, March 01, 2007
Medullary Thyroid Cancer: One Chance to Cure
I saw a 50 Y/O male for second opinion with a Biopsy proven DX of Medullary Thyroid Carcinoma MCT. He had prior FNA of a 2 cm left lobe nodule. The cells and staining for calcitonin on the slides confirmed MCT. What do I need to do to help him. First, I did an ultrasound of 1-6 levels lymph nodes on both sides of the neck. He had many abnormal shaped nodes. Because the nodule was on the left, and his RET DNA did not show family MCT, the surgeon was only going to do the lymph nodes on that side of the nodule. I called the surgeon, and informed him that there were nodes on Both sides, and if he hoped to give him the best chance for cure he needed to do complete lymph node removal on the right, left, and central compartment. He agreed to do this extensive surgery to try to cure him. There were cancer nodes on both sides of the neck. He took out everything, and sent him back to me on thyroid hormone to see what the MCT cancer marker, Calcitonin was after complete bilateral neck disection. He is recovering well without major side effects. Stay turned for a post surgery follow tests in 4 weeks.
DR.G.
DR.G.
Medullary Thyroid Cancer: One Chance to Cure
I saw a 50 Y/O male for second opinion with a Biopsy proven DX of Medullary Thyroid Carcinoma MCT. He had prior FNA of a 2 cm left lobe nodule. The cells and staining for calcitonin on the slides confirmed MCT. What do I need to do to help him. First, I did an ultrasound of 1-6 levels lymph nodes on both sides of the neck. He had many abnormal shaped nodes. Because the nodule was on the left, and his RET DNA did not show family MCT, the surgeon was only going to do the lymph nodes on that side of the nodule. I called the surgeon, and informed him that there were nodes on Both sides, and if he hoped to give him the best chance for cure he needed to do complete lymph node removal on the right, left, and central compartment. He agreed to do this extensive surgery to try to cure him. There were cancer nodes on both sides of the neck. He took out everything, and sent him back to me on thyroid hormone to see what the MCT cancer marker, Calcitonin was after complete bilateral neck disection. He is recovering well without major side effects. Stay turned for a post surgery follow tests in 4 weeks.
DR.G.
DR.G.
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