Extraosseous accumulation of 99mTc-MDP in a benign intrapulmonary calcified focus

A patient with a benign calcified pulmonary focus concentrating 99mTc-methylenediphosphonate is described. To the best of our knowledge, this is the first description of the accumulation of 99mTc-phosphate compounds in a benign calcified focus of the lung. The value of a routine correlation with X-ray study in every case of focal chest concentration of 99mTc-MDP is emphasized.