TY - JOUR AU - Bograd, Adam J. PY - 2020 TI - Primitive neuroectodermal tumor with lung metastases and an unknown primary: a unicorn? JF - Current Challenges in Thoracic Surgery; Vol 2 (February 2020): Current Challenges in Thoracic Surgery Y2 - 2020 KW - N2 - “ When one hears hoofbeats, think of horses, not zebras ,” is a common line taught to medical students and residents throughout the world. Rarely however those hoofbeats belong not to horses or zebras, rather to unicorns. UR - https://ccts.amegroups.org/article/view/34681