On the latest episode of Behind the Mystery, The Balancing Act is learning about two rare diseases: Autosomal Dominant Polycystic Kidney Disease and Blastic Plasmacytoid Dendritic Cell Neoplasm. First, Behind the Mystery takes a closer look at Autosomal Dominant Polycystic Kidney Disease , or ADPKD, a rare, genetic condition. The Balancing Act travels to Yale School of Medicine to learn about diagnosis and management of ADPKD from Dr. Neera Dahl. Then, Behind the Mystery takes a closer look at Blastic Plasmacytoid Dendritic Cell Neoplasm , a rare disease that is often misdiagnosed and affects at least 500 to 1,000 patients each year in the U.S.