Paraneoplastic syndromes are generally defined as clinical disorders associated with malignant diseases, and hypocalcemia associated with cancer is a rare condition. A woman in her 60s was referred to our hospital for the further examination of massive ascites due to carcinoma of unknown primary origin. She complained of numbness around her lips, and marked hypocalcemia of 5.0 mg/dL was noted. ...

Denosumab has been approved for the prevention of skeletal-related events of bone metastases (120 mg at every 4 weeks) and for the treatment of osteoporosis (60 mg at every 6 months). Post-denosumab hypocalcemia occurred in 5.2% of the cancer patients (1), but such an event was rarely reported in osteoporosis patients (2). Recently, severe hypocalcemia because of a lower dose of denosumab for o...

BACKGROUND Many factors influence serum calcium concentration, but the major determinants of calcium homeostatsis are parathyroid hormone (PTH), vitamin D, the ionized calcium, and phosphate [1]. Therefore, deranged calcium metabolism is often seen in the presence of disordered parathyroid hormone (PTH) and/or vitamin D actions. Among these causes is end-organ resistance to the biological effec...

Objective. To describe an asymptomatic presentation of severe hypocalcemia secondary to vitamin D deficiency in an elderly patient. Methods. We describe the presentation and clinical course of an elderly woman with asymptomatic severe hypocalcemia referred to an endocrinology clinic for hyperparathyroidism. Results. The patient is an 83-year-old Caucasian woman who presented to an endocrinology...

A 68-year-old man with end-stage renal disease was hospitalized because of radicular pain and weakness in the left arm and hand. Sonography and computed tomography had recently shown a large right renal mass. On admission, magnetic resonance imaging demonstrated vertebral metastases with epidural extension, and radiotherapy was directed to the spine and kidney. Hypocalcemia was first noted on t...

Dilated cardiomyopathy, which mostly has an idiopathic etiology or is caused by genetic inheritance or infection, can cause irreversible congestive heart failure. Hypocalcemia is a rare etiology of reversible dilated cardiomyopathy. Here we report the case of a two-month-old girl with congestive heart failure who was diagnosed as having dilated cardiomyopathy secondary to hypocalcemia. After ca...

Hypocalcemia is a common and important problem in dairy cows. It is usually defined as subclinical and clinical according to blood concentrations of total (tCa) or ionized (iCa) calcium (Ca) and the diagnosis of clinical signs. Cows with clinical hypocalcemia present muscle weakness and fasciculation, inability to control body temperature, anorexia, and or inability to stand which eventually le...

We present a case of prominent hypocalcemia and hyperkalemia attributed to magnesium infusion in a preeclamptic patient. Iatrogenic hypermagnesemia is an underrecognized cause of hypocalcemia and hyperkalemia. Our report illustrates the effects of magnesium therapy on serum calcium and potassium, necessitating close electrolytes monitoring when used.