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A 34-year-old woman came to hospital with a recent history of asymptomatic diffuse thyroid enlargement and normal thyroid profile. Physical examination showed a palpable nodule in the left lobe. Ultrasound confirmed a solid nodule in the left lobe with increased Doppler color flow. The anti TPO antibodies were positive, and fine needle biopsy showed no malignant cells. Six months later, she returned because of weight loss, palpitations, heat intolerance, and hand tremor. Thyroid hormones were TSH 0,01 mIU/dL and free T4 4,59 ng/dL. Thyroid scan identified homogeneously increased uptake throughout the gland, especially in the middle of both lobes. Treatment was started with methimazole and propanolol. After six months of treatment, her symptoms disappeared, and thyroid profile was normal, and she received a high dose of I-131. Graves' disease with functioning nodules is known as Marine-Lenhart syndrome. The frequency is rare, only 1- 2,7% of patients with Graves' disease have concomitant functioning nodules. Functional nodules may be more resistant to radioiodine therapy than the extranodular tissue; generally required higher dose of radioactive iodine for ablation. [ABSTRACT FROM AUTHOR]

A 14-year-old woman presented with recent history of heat intolerance, hand tremor and palpitations. Physical examination showed diffuse thyroid enlargement, and thyroid profile, suppressed TSH and elevated thyroid hormones. Anti-TPO antibodies were positive. Initial treatment included methimazole and beta blockers. After twenty days, patient complained of malaise, fever, polyarthralgia, maculopapular rash, and leg swelling. ANA antibodies were negative; however, ANCA antibodies were positive. Methimazole was stopped and prednisone started. Her clinical evolution was good, and she received I 131. ANCA associated vasculitis related to thionamides are infrequent. These vasculitis affect small vessels of skin, however they can also affect kidneys and lungs. Arthralgia and myalgia are the classical symptoms. In most patients, symptoms disappear after cessation of drug. In some cases, glucocorticoid or immunosuppressive therapy are also needed. [ABSTRACT FROM AUTHOR]