Vitamin D intoxicationMilk-alkali syndromeMedicationsGranulomatous diseaseFeedbackCorrect! Primary hyperparathyroidism and malignancy account for over 90% of cases ofhypercalcemia. Calcium is regulated in bone, the gastrointestinal tract, and the kidney. Other causes ofincreased bone turnover include Paget's disease, immobilization, hyperthyroidism, hypervitaminosis A,and adrenal insufficiency. Causes of increased GI absorption include vitamin D intoxication andmilk-alkali syndrome.A 35 year old female undergoes a physical exam while obtaining new insurancecoverage. She reports 1 year of slowly progressive dyspnea on exertion and a change inskin color. Her PE is notable for the the presence of cyanosis, an elevated JVP, a fixedsplit loud loud S2, and peripheral edema. Arterial O2 saturation is 84% at room air. CXRshows cardiomegaly and normal lung parenchyma. Ten years ago, at her last insurancePE, her PE, O2 saturation and CXR were normal. Echocardiography most likely willreveal:*5/5Ebstein's anomalyVentricular septal defectTetralogy of FallotTruncus arteriosus