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At least 415 records · Page 23Linked to original sources
PubMed1991

Stable isotopic measurement of endogenous fecal calcium excretion in children.

Using a stable isotopic technique in which 42Ca was administered via a bolus injection, we measured endogenous fecal calcium excretion, Vf, in five healthy children, aged 3-14 years. The Vf averaged 1.4 +/- 0.4 mg/kg/day, and was lower than urinary Ca excretion (Vu) in four of the five children. These results for Vf are consistent with previously reported results for Vf in healthy adults and much lower than those reported in premature infants. These results may be useful in understanding developmental changes in Ca metabolism and in interpreting dual tracer Ca isotope studies in children.

Adolescent↗
PubMed1965

SOME ASPECTS OF CALCIUM METABOLISM IN MALIGNANT DISEASE OF BONE.

The rate of calcification of new bone (accretion rate) was measured by a radioisotope technique in 20 patients with carcinoma of the breast, 14 patients with multiple myelomatosis, five patients with Paget's disease of bone, and in six patients with solitary, non-osseous tumours. The rate of bone destruction was assessed in these patients by the measurement of the rate of urinary calcium excretion. In the patients with carcinoma of the breast and bone metastases there was a marked increase both in the accretion rate and in the urinary calcium excretion suggesting an osteoblastic response to bone destruction. An osteoblastic response was also present in the patients with multiple myelomatosis but was not correlated with the urinary calcium excretion. In patients with Paget's disease of bone, high values of accretion rate were found indicating very active new bone formation.

Bone Neoplasms↗