IMPE Abstracts

Contemporary ACTH assays have variable susceptibility to interference by endogenous antibodies, particularly heterophile antibodies, leading potentially to unnecessary investigations1-6. Often, determining the cause of the spurious ACTH results is impossible beyond identifying the presence of interference of heterophile antibodies6. Here we describe two cases of Cushing Syndrome due to Primary Pigmented Nodular Adrenocortical Disease (PPNAD) whose evaluat...

Objectives: Fibrous dysplasia (FD) is a rare disorder resulting in fractures, pain, and skeletal deformities. Abnormal osteoprogenitor cells produce excess FGF23, leading to hyperphosphaturia in most patients and frank hypophosphatemia in a smaller subset. Studies suggest that FGF23-mediated hypophosphatemia is associated with increased FD-related morbidity. However, the relationship between serum phosphorus levels and skeletal complications has not been inves...