Chrissy Zimmerman's 4 year old daughter Aria had no symptoms when she went to school in early September of 2022, but by the end of the day, she had 2 golf ball sized swollen nodules that were noticed by her teacher. That led to her diagnosis of T Cell Acute Lymphoblastic Leukemia , which was followed by her being diagnosed with Hemophagocytic Lymphohistiocytosis and then by Langerhans Cell Histiocytosis which led to her passing in February of 2024.