<prompt> Which chromosome mutation is associated with medulloblastoma?Chromosome 16Chromosome 17Chromosome 18Chromosome 19  <response>: Medulloblastoma can be subdivided into the following 4 groups: Group 3 medulloblastoma, often with MYC amplification and isochromosome 17 i17q, tends to occur in infants and children, with a classic or large cell histology and the worst prognosis. Group 4 is characterized by an i17q cytogenetic alteration. IMG showing DROP METASTASIS i.e. metastasis occur by drop. 