Calcitonin concentrations in patients with chronic kidney disease on hemodialysis in reference to parathyroidectomy.

OBJECTIVE: Calcitonin is considered to be a biomarker of medullary thyroid carcinoma and C-cell hyperplasia, but calcitonin can also be elevated in about 30% of the patients with end-stage kidney disease. We reported preoperative calcitonin serum levels in 31 patients on hemodialysis before parathyroid surgery, evaluate influencing factors on calcitonin levels and determine postoperative calcitonin levels after parathyroid surgery. RESULTS: Median preoperative serum calcitonin was 8 pg/ml (range 2 to 165 pg/ml), serum calcitonin concentration declined postoperatively to 3 pg/ml (range 1 to 192 pg/ml). There was a strong positive correlation between pre- and postoperative serum calcitonin levels (r = 0.92; p > 0.01). Elevated preoperative serum calcitonin concentrations (more than 10 pg/ml) were found in 14 out of 32 dialysis-dependent patients (44%). Preoperative calcitonin levels of male patients were significantly higher than female patients. Hypercalcitoninemia showed a positive correlation to body mass index (p < 0.01). We found no correlation between preoperative calcitonin levels and patients' age, duration of hemodialysis dependency, cinacalcet medication or preoperative concentrations of parathyroid hormone, creatinine and calcium. Basal calcitonin levels higher than 10 pg/ml are common in patients on dialysis. Male gender and morbid obesity are risk factors for hypercalcitoninemia. Calcitonin concentration decreases after parathyroid operation.

A Case of Calcitonin Secreting Pheochromocytoma / 대한내분비학회지

Pheochromocytoma is a catecholamine producing turnor and raise with less than 0.1% of hypertensive patients. It is developed, most commonly, in sporadic pheochromocytoma or multiple endocrine neoplasia type 2. Therefore, when hypercalcitoninemia is found in a patient with pheochromocytoma, the possibility of multiple endocrine neoplasia type 2 or the ectopic secretion of calcitonin must be considered. Recently we experienced a 45 year old male patient with sporadic pheochrornocytoma. He also had hypercalcitoninemia and normocalcemia. After the removal of pheochromocytoma, serum calcitnnin level returned to normal. Secretion of calcitonin was confirmed by immunohisto- chemical stain.

Childhood infection-associated hypocalcemia

The causes of hypocalcemia in patients suffering from severe infection including sepsis are largely uncertain. So we measured serum albumin, total protein, cholesterol, PTH, and calcitonin of the infection-associated hypocalcemic children and compared with those of normocalcemic children suffering from tsutsugamushi disease. All had normal renal functions and had been admitted to the department of pediatrics of Gyeongsang National University Hospital. Hypocalcemic patients were hypoalbuminemic. Serum total calcium was inappropriately more decreased compared to the decreased amount of serum albumin in the hypocalcemic group. We also observed more frequent incidence of hypocholesterolemia (<100mg/dL) in this group. And serum PTH was appropriately elevated in the hypocalcemic patients. Serum calcitonin was elevated in both groups, but 6 times higher in the hypocalcemic group than in the normocalcemic one. Serum total calcium was positively correlated with serum albumin and negatively correlated with serum PTH and calcitonin.