Hephzibah J et al. - Bone scintigraphy can be useful in the detection of early pulmonary calcifications, which have been associated with impaired pulmonary function and, due to their size, are generally not detected by X-ray. Bone scintigraphy may add helpful information in the case of nonspecific CT findings. Bone scan usually shows intense bilateral uptake of the radiopharmaceutical in the lungs.4 Differential diagnosis of diffuse lung uptake in bone scans includes patients with hyperparathyroidism, Hodgkins lymphoma, Sarcoidosis, Wegener's vasculitis, Primary amyloid, renal failure and Pneumocystis carinii.5
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