Fixations extra-osseuses inhabituelles de diphosphonates technétiés dans un cas de cancer bronchique

Visceral uptake of radiobiphosphonates on bone scan is infrequent. A 53-year-old man, with untreated left lung cancer was referred to our department for a bone scan. The bone scan showed a bone metastasis at the right humeral shaft, and uncommon visceral uptake throughout the gastric wall, the liver and the right lung parenchyma. The serum biochemistry revealed a malignant hypercalcemia. Thus, the incidental observation of metastatic calcifications on bone scintigraphy should alert the physician, and lead to an etiological investigation to search an unknown calcium metabolism disturbances requiring emergency treatment.