When cells divide, DNA must be copied from one cell to the next—a process called replication.
Clinicians typically classify meningiomas—the most common type of brain tumor—into three grades, ranging from slow-growing to aggressive. But a new multi-institutional study suggests that appearances may be deceiving. If a tumor shows activity in a gene called telomerase reverse transcriptase, it tends to recur more quickly, even if it looks low-grade under the microscope.
