Pineal Region Choriocarcinoma, also known as pineal choriocarcinoma, is related to pulmonary vein leiomyosarcoma and vulvar sarcoma. An important gene associated with Pineal Region Choriocarcinoma is ALPP (Alkaline Phosphatase, Placental), and among its related pathways/superpathways is Mesenchymal Stem Cells and Lineage-specific Markers. Affiliated tissues include pineal and spinal cord, and related phenotype is Reduced mammosphere formation.