Vitamin D-Intoxicated Patient With Hypoparathyroidism

Plasma and erythrocyte magnesium in Huntington's chorea.

“…The concentration of calcium can influence the effect of alterations in magnesium concentration and vice versa, and it may be that the ratio of free calcium to magnesium ions in extracellular fluid is more important than the actual concentrations of the individual ions (Munday and Mahy, 1964). It has been suggested that the neurological symptoms in a patient with hypercalcaemia responding to magnesium therapy may have been due to intracellular magnesium depletion secondary to the high calcium concentrations (Lynch, Lemon, Henn, Ellingson, and Grissom, 1964). Conversely, magnesium has been found to accumulate in the basal ganglia of a patient with vascular calcification (Bruyn, Staal, and Bots, 1964).…”

Electroencephalography of Encephalopathy in Patients With Endocrine and Metabolic Disorders

“…EEG changes appear at serum calcium levels above 12-13 mg/dl (Spatz et al, 1977; Juvarra et al, 1985). Most commonly, the EEG shows diffuse slowing of the posterior basic rhythm (Bogdonoff et al, 1956; Edwards and Daum, 1959; Lynch et al, 1964). In a case series of 8 patients with symptomatic hypercalcemia of various etiologies, all patients had similar EEG patterns, such as a diffuse slowing with paroxysms of frontal dominant, moderately high-voltage activity in the theta/delta range (Moure, 1967) - findings that were later corroborated in several larger case series (Evaldsson et al, 1969; Allen et al, 1970; Cohn and Sode, 1971; Swash and Rowan, 1972).…”