Intrathyroid parathyroid carcinoma with intrathyroidal metastasis to the contralateral lobe: source of diagnostic and treatment pitfalls.

Intrathyroidal parathyroid carcinoma is extremely rare clinical entity with potentially multiple diagnostic pitfalls. We report a case of 40-year-old man presented with classical manifestations of primary hyperparathyroidism, severe hypercalcemia and profoundly increased serum parathyroid hormone level. Neck ultrasonography demonstrated multinodular goiter with predominant 34 mm nodule in left thyroid lobe. Additional 16 mm nodule was found beneath the left lobe. Routine percutaneous fine-needle aspiration of predominant nodule indicated follicular thyroid carcinoma, while left inferior nodule was confirmed to be of parathyroid origin. The patient underwent surgery, during which frozen sections identified medullary thyroid carcinoma with metastasis to upper mediastinal lymph node. Permanent sections of the predominant left lobe nodule revealed intrathyroidal parathyroid carcinoma surrounded with multiple microscopic metastases. Left inferior nodule was metastatic lymph node. Additional 10 mm intrathyroidal metastasis of primary parathyroid carcinoma was found within right thyroid lobe. This case indicates that fine-needle-aspiration and intraoperative biopsy are of limited value in diagnosing parathyroid carcinoma, especially if localized intrathyroidally. Oncological en-block resection is treatment of choice, implying ipsilateral lobectomy in case of thyroid invasion. This firstly described case of intrathyroidal parathyroid carcinoma causing intrathyroidal dissemination may influence future treatment strategies.

Chronic, long-lasting, and untreated gout with concomitant dilated cardiomyopathy and exceptionally vast anasarca: case report.

Gout is the most common type of inflammatory arthritis in man caused by deposition of urate crystals into the joints as the result of elevated serum urate levels. A case of a 59-year-old patient with untreated, long-lasting gout and clinical manifestation of decompensated global dilated cardiomyopathy is presented. Examination revealed generalized pitting edema extending from both lower extremities to the sacrum, abdominal, and thoracic wall, with scrotal swelling and upper extremity involvement, an exceptionally vast generalized edema, i.e. anasarca. Proximal and distal interphalangeal joints of the hands and feet were swollen and deformed, with marked yellow tophi nodules. Laboratory studies revealed high serum uric acid concentration (546 micromol/L), decreased creatinine clearance (0.8 mL/s) and albumin concentration (27.4 g/L), as well as increased total urine protein mass (0.35 g/24 h). X-rays of the affected feet and fists showed punched-out lesions of the subchondral bone with overhanging bony margins in the first metatarsophalangeal, proximal, and distal interphalangeal joints of both hands. The extreme clinical presentation resolved upon intravenous administration of diuretics and pleurocentesis, followed by oral medications including furosemide, angiotensin-converting enzyme inhibitor, spironolactone and digoxin. Since serum urate level has been identified as an independent risk factor for the development of ischemic heart and chronic kidney disease, regulation of urate concentration is necessary, especially in patients diagnosed with gout.

Development of Graves' disease following radioiodine treatment for autonomously functioning thyroid adenoma: case report.

A patient with development of autoimmune hyperthyroidism following radioiodine treatment for autonomously functioning thyroid adenoma is presented. This is a rare occurrence, probably as a consequence of shedding of the thyroid-stimulating hormone receptor, which is a source of antigen leading to activation of the autoimmune response in susceptible individuals.