RT Journal Article SR Electronic T1 An unusual cause of pulmonary calcification JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e229725 DO 10.1136/bcr-2019-229725 VO 12 IS 6 A1 Lakshmana Perumal, Nandhini A1 Selvi, Jayakumar A1 Sahoo, Jaya Prakash A1 Kamalanathan, Sadishkumar YR 2019 UL http://casereports.bmj.com/content/12/6/e229725.abstract AB Metastatic pulmonary calcification (MPC) is an uncommon entity resulting from abnormalities in calcium-phosphorus homoeostasis. Most cases reported in the literature are among patients with chronic kidney disease receiving haemodialysis. Primary hyperparathyroidism is a relatively common condition affecting calcium homoeostasis, in which MPC can rarely occur. We report the case of one such patient who presented with severe hypercalcaemia and features of interstitial lung disease. Radiographic imaging was normal and the diagnosis was clinched by diffuse pulmonary uptake in 99mTechnetium-methylene diphosphate scan.