In this week’s episode, we will learn more about the immune defects and granule dysfunction in the leukocytes of patients with the rare recessive platelet disorder, gray platelet syndrome, review a study that examines the cost effectiveness of first-line versus third-line ibrutinib in patients with chronic lymphocytic leukemia, and review a manuscript that proposes a diagnostic classifier to facilitate the diagnosis of childhood autoimmune lymphoproliferative syndrome.