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Laboratory data showed hypercalcaemia (total calcium 3.92\u2009mmol\/L (normal range 2.2\u20132.6\u2009mmol\/L), ionised calcium 1.87\u2009mmol\/L (1.15\u20131.35\u2009mmol\/L)), low intact parathyroid hormone (iPTH) 15\u2009ng\/L, (15\u201365\u2009ng\/L) and high 1,25(OH)2D3 128.9\u2009pg\/mL, (15.2\u201390.1\u2009pg\/mL). Chest CT-scan revealed bilateral apical lung lesions after 15 days of antibiotics. Bronchoalveolar sample was PCR positive for <jats:italic>Pneumocystis jirovecii<\/jats:italic>. He was treated with an extra session of haemodialysis with 1.25\u2009mmol\/L dialysate calcium concentration, oral trimethoprim-sulfamethoxazole was started and oral corticosteroid dose increased to 1\u2009mg\/kg for 1\u2009week. Hypercalcaemia decreased progressively after initiation of these treatments. We concluded a case of hypercalcaemia secondary to <jats:italic>P. jirovecii<\/jats:italic> infection.<\/jats:p>","DOI":"10.1136\/bcr-2019-231334","type":"journal-article","created":{"date-parts":[[2020,1,27]],"date-time":"2020-01-27T04:59:20Z","timestamp":1580101160000},"page":"e231334","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["<i>Pneumocystis jirovecii<\/i> pneumonitis: cause of acute hypercalcaemia in chronic haemodialysis patient"],"prefix":"10.1136","volume":"13","author":[{"given":"Florian","family":"Garo","sequence":"first","affiliation":[{"name":"Departement of Nephrology, Dialysis and Apheresis, Centre Hospitalier Universitaire de Nimes, Nimes, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cedric","family":"Aglae","sequence":"additional","affiliation":[{"name":"Departement of Nephrology, Dialysis and Apheresis, Centre Hospitalier Universitaire de Nimes, Nimes, 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