HYPERCALCAEMIA AND CANCER

The site of VX2 tumor transplantation affects the development of hypercalcemia in rabbits

The relationship between plasma levels of 15-keto-13, 14-dihydroprostaglandin E2 (15K-H2-PGE2) and serum calcium levels was studied in nontumor-bearing rabbits and in rabbits bearing the VX2 carcinoma intramuscularly and intra-abdominally. The plasma levels of 15K-H2-PGE2 in the two groups of tumor-bearing animals did not vary significantly but was several fold greater than in nontumor-bearing rabbits. Rabbits bearing the VS2 carcinoma intramuscularly developed hypercalcemia between the second and third week after implantation of neoplastic tissue and remained hypercalcemic until they expired. The serum calcium levels in rabbits bearing the VX2 carcinoma intra-abdominally did not vary significantly from those of nontumor-bearing rabbits. The differences in the serum calcium levels in rabbits bearing the VX2 carcinoma at intramuscular and intra-abdominal implant sites may be related to different extents of metabolism by the lung and by the liver of prostaglandin E2 or other cyclooxygense of polyenoic fatty acids produced by the tumor.

Fatal hypercalcaemia complicating carcinoma of breast, resistant to cortisone and phosphate administration

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Hypercalcaemia associated with adenocarcinoma of kidney without demonstrable bone lesions

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Review of endocrine syndromes associated with tumours of non-endocrine origin

During the past 10 years there has been particular interest in the occurrence of a number of endocrine syndromes in association with tumours of organs other than the endocrines. Evidence is increasing to suggest that these result from the formation of hormone-like substances by the tumours. The clinical importance and theoretical implications of these syndromes constitute the justification for reviewing them here.