[en] Three cases of diffuse lung uptake of the bone scanning agent /sup 99m/Tc diphosphonate, which appears to reflect metastatic pulmonary calcification, are described. Each patient had hypercalcemia and renal failure. Clinical features common to patients with this scan pattern were ascertained from a review of the literature. Renal failure was present in all, and the majority have had hypercalcemia. The bone scan may prove to be a valuable adjunct to the diagnosis of metastatic pulmonary calcification; this characteristic pattern should be more widely appreciated