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Hyperthyroidism in two patients with Crohn disease and Takayasu arteritis
A Kettaneh1, S Prevot, A Biaggi
1Dept. of Internal Medicine, Hôpital Jean Verdier, Bondy, France. adrien.kettaneh@jvr.ap-hop-paris.fr
Insights
This study reports two cases of hyperthyroidism in patients with Crohn disease and Takayasu arteritis. The findings suggest a potential link between these conditions, possibly due to genetic factors and iodine deficiency impacting the Nuclear Factor kappaB pathway.
Area of Science:
- Endocrinology
- Gastroenterology
- Rheumatology
Background:
- Crohn disease (CD), Takayasu arteritis (TA), and thyroid abnormalities are independently observed in patients.
- This report details two cases of concurrent hyperthyroidism, CD, and TA.
Observation:
- Two women presented with hyperthyroidism alongside pre-existing CD and TA.
- Diagnostic evaluations included thyroid function tests, antibody assays, ultrasonography, and iodine uptake scans.
- Both patients underwent subtotal thyroidectomy due to persistent thyrotoxicosis.
Findings:
- Neither patient had detectable anti-thyrotropin receptor (TRAK) or anti-thyroid antibodies.
- Thyroid imaging revealed multinodular goiter and hot nodules in both cases.
- The co-occurrence of these three conditions suggests a potential non-fortuitous association.
Implications:
- The shared association may stem from genetic predispositions and disease-related iodine deficiency.
- The Nuclear Factor kappaB pathway is hypothesized to play a role in the pathogenesis of this triad of diseases.
- Further research is warranted to elucidate the underlying mechanisms connecting CD, TA, and thyroid dysfunction.
Abstract:
Thyroid abnormalities and Takayasu arteritis (TA) have been reported separately in patients with Crohn disease (CD). We report two patients with hyperthyroidism, CD and Takayasu arteritis and discuss hypothetical mechanisms. Case 1. A thyrotoxic goiter was diagnosed in 1987 in a 34-year-old woman treated since 1969 for severe CD and TA. Iodine urinary excretion was 405 microg/mL (20-500). Anti-thyrotropin receptor (TRAK) and anti-thyroid antibodies were not detectable. The ultrasonography showed a nodule in the right lobe of the thyroid and two nodules in the left lobe. A 123I thyroid scan showed a multinodular goiter with no hot nodule. She was treated successfully with propylthiouracile until 1991, when a new episode of thyrotoxicosis led to a subtotal thyroidectomy. Case 2. Hyperthyroidism was diagnosed in February 2000 in a 49-year-old woman treated for CD and TA, both diagnosed in 1980. TRAK and anti-thyroid peroxydase antibodies were not detectable. The ultrasonography disclosed a normal thyroid volume with an inhomogeneous parenchymal structure and nodular images in both lobes. A 123I thyroid scan showed one hot nodule in the lower part of each lobe. A subtotal thyroidectomy was performed. The association of these three diseases may not be fortuitous, possibly explained by genetic predisposing factors and disease-related iodine deficiency both involving Nuclear Factor kappaB pathway.
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