What is a notable characteristic of Medulloblastoma?

Medulloblastoma is notably characterized by the presence of scant cytoplasm within its tumor cells. This type of brain tumor, primarily affecting children, typically exhibits small, round blue cells that have a limited amount of cytoplasm, which is a distinctive histological feature when examining the tumor under a microscope.

The scant cytoplasm is often seen in tightly packed cellular arrangements, which contributes to the "small round blue cell tumor" classification. This feature can help pathologists differentiate medulloblastoma from other similar tumors of the central nervous system, as recognizing the small cell size and limited cytoplasmic content is critical for accurate diagnosis.

Other characteristics may be present in medulloblastoma in certain cases, such as necrosis or varying immune cell populations; however, the defining aspect remains the scant cytoplasm, reinforcing the diagnosis and understanding of this tumor type.