Abstract
A 71-year-old patient was referred for suspected hyperthyroidism because of a 15-kg weight loss, suppressed thyroid stimulating hormone (TSH), and a 4-cm nodule in the left thyroid lobe. Both free T4 and T3 were normal. Antithyroglobulin, anti-TSH receptor and antimicrosomal antibodies were absent. Thyroid scintigraphy showed a cold nodule in the left thyroid lobe. CAT scan of the neck revealed a 4-cm inhomogeneous nodule at the left side. An elevated sedimentation rate suggested bacterial thyroiditis, localized Quervain thyroiditis, malignancy, and the fibrosing variant of Hashimoto's thyroiditis or Riedel's thyroiditis. A fine needle biopsy of the thyroid nodule showed no malignant cells but was inconclusive. A true cut biopsy demonstrated atypical inflammation and also failed to reveal the diagnosis. Therefore, the patient was admitted to the hospital for further work-up and was unexpectedly found to have nodular lesions in the lung on a chest X-ray. Additional blood analysis revealed a positive cytoplasmic ANCA-titer. After inconclusive peripheral lung biopsies, a left hemithyroidectomy and a very large video-assisted thoracoscopic lung biopsy were performed, both revealing extensive zones of necrosis surrounded by granulom...Continue Reading
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