Treatment of severe hypocalcaemia due to osteoblastic metastases in a patient with post-thyroidectomy hypoparathyroidism with 153 Sm-EDTMP.

Symptomatic hypocalcaemia is an uncommon finding in patients with malignant tumours. We describe a patient with advanced metastatic breast cancer who developed severe hypocalcaemia caused by the combination of osteoblastic metastases and a permanent postoperative hypoparathyroidism. The patient failed to be treated with the conventional replacement therapy and was submitted effectively to radionucleotide therapy with 153 Sm.