The presence of eccentric cysts has been recognized as suggestive of ATRT; the frequency of peripheral cysts does not depend on the supra- or infratentorial localization [26,27], but it is mainly influenced by the molecular subgroup and, interestingly, eccentric cysts ranged from only 40% in ATRT-MYC to 71% in ATRT-SHH and even 94% in the ATRT-TYR group [26]. The gene discussed is MYC; the disease is atypical teratoid rhabdoid tumor.