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Wegener's granulomatosis presenting as a thyroid mass
A J Schuerwegh1, J Verhelst, H Slabbynck
1Department of Immunology-Allergology-Rheumatology, University of Antwerp (UIA), Universiteitsplein 1, B-2610, Wilrijk Antwerp, Belgium. immuno@ua.ac.be
Clinical Rheumatology
|March 16, 2006
Summary
Wegener's granulomatosis (WG) is a rare cause of thyroid inflammation, presenting as a thyroid nodule. This case highlights the importance of considering WG in the differential diagnosis of inflammatory thyroid lesions.
Area of Science:
- Rheumatology
- Endocrinology
- Pulmonology
Background:
- A 71-year-old patient presented with symptoms suggestive of hyperthyroidism, including significant weight loss and a suppressed thyroid-stimulating hormone (TSH) level.
- Imaging revealed a 4-cm left thyroid nodule, initially investigated for malignancy or common thyroiditis.
Observation:
- Despite extensive work-up, including fine needle and true cut biopsies, the thyroid nodule's nature remained inconclusive.
- Unexpectedly, nodular lung lesions were discovered, and positive cytoplasmic ANCA (antineutrophil cytoplasmic antibodies) titers were detected.
Findings:
- Surgical biopsies of both the thyroid and lung demonstrated extensive necrosis with granulomatous inflammation, characteristic of Wegener's granulomatosis (WG).
- This case represents the first documented instance of WG affecting the thyroid gland.
Implications:
- Wegener's granulomatosis, though rare, must be considered in the differential diagnosis of inflammatory thyroid nodules.
- This finding broadens the understanding of WG's potential organ involvement and diagnostic challenges.
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