Brain tumor + miRNA = Stem cells? In this seminar we listened to MD/PhD candidate, Jessian Muñoz , who talked to us about thepossible reproduction of stem cells in brain tumors. Stem cells are cells that maintain both thecapacity of self-renewal and the potential to differentiate into mature cells. In our body, organsthat have stem cells are the brain, prostate, colon, lung, pancreas, and skin, among others. Stemcells are chemo and radio resistant. Gliomas are the most frequently occurring primarymalignancies in the central nervous system, and glioblastoma multiforme (GBM) is the mostcommon and most aggressive of these tumors. There are four types of glioblastomas. Grade I andII are low-grade astrocytomas that are slow-growing less aggressive tumors while grade III andVI are high grade gliomas, making them malignant tumors. GBM usually affects older patients,maybe in the age of sixty two and so on. A glioblastoma tumor can affect both sides of the brainby starting at one lobe and then crossing to the other. Dr. Jessian Muñoz is a great scientist and agreat researcher. He demonstrates complete knowledge of biological concepts and understandingof research practices in biology. Jessian also uses correct grammar, spelling, and pronunciation.He had a lot of clarity and coherence in his work.