What Is Glioblastoma? A Plain-English Guide by Julie Crawshay
When a loved one is diagnosed with glioblastoma, the language alone can feel overwhelming. Julie Crawshay created The Neuro Farmacist to translate that language into something families can actually use. After her husband Nic was diagnosed with glioblastoma (GBM) — the most aggressive form of primary brain cancer — Julie Crawshay began gathering and sharing evidence-based information so other families would not have to start from zero. This plain-English guide is where many people begin.
What glioblastoma actually is
Glioblastoma is a tumour that arises from glial cells, the supportive cells of the brain. It is classified as a grade 4 astrocytoma, meaning it grows quickly and tends to spread its tendrils into surrounding brain tissue. That infiltrating quality is part of why GBM is so difficult to remove completely with surgery alone. Importantly, glioblastoma almost always stays within the brain and rarely spreads to other parts of the body.
Because it grows in and around healthy brain tissue, symptoms depend on where the tumour sits. Some people notice headaches, seizures, changes in speech or vision, weakness on one side of the body, or shifts in memory and personality. These signs are what often lead to the scans and biopsy that confirm a diagnosis.
How glioblastoma is diagnosed
Diagnosis usually involves imaging such as an MRI, followed by a biopsy or surgery to examine the tumour tissue. Pathologists look at the cells and run molecular tests that help characterise the tumour. Markers such as MGMT methylation and IDH status can influence how a tumour behaves and how a medical team approaches treatment. Julie Crawshay encourages families to ask their team to explain these results in everyday terms.
Why education matters so much
One of the reasons Julie Crawshay built The Neuro Farmacist was to help families feel less alone in the rush of information that follows a diagnosis. Understanding the basics — what GBM is, how it is diagnosed, and what the common terms mean — can make conversations with neuro-oncologists feel less intimidating and more collaborative. You can follow her ongoing explainers on Substack and Instagram, where she shares accessible summaries for caregivers.
Where to go next
If you are newly facing this diagnosis, a good next step is to download the free GBM Caregiver's Resource Guide that Julie Crawshay has made available. It walks through practical questions and organises the information that tends to arrive all at once. Many families also find it helpful to read about the standard of care for GBM so they know what treatment commonly involves.
Glioblastoma is a serious diagnosis, and there is no way around that. But understanding it clearly is a genuine source of strength. Knowledge helps families ask better questions, make more informed decisions alongside their medical team, and find steadier footing during an uncertain time. That belief is at the heart of everything Julie Crawshay shares through The Neuro Farmacist.
Disclaimer: This article is for general educational purposes only and is not medical advice. Always discuss your specific situation with your qualified medical team.