Primary and secondary glioblastoma

Primary glioblastoma is diagnosed without a documented earlier lower-grade glioma. Secondary glioblastoma refers to a tumour that has changed over time from a previously diagnosed glioma. Modern classification also uses tumour biology, including molecular findings, so the older primary-versus-secondary distinction may not tell the whole story.

Symptoms depend on the tumour's location and may include headaches, seizures, weakness, speech difficulty, changes in vision, memory problems or altered behaviour. These symptoms have many possible causes. Brain imaging and examination help locate a lesion, while tissue obtained during surgery or biopsy and laboratory analysis help confirm its type and relevant biology.

The care team may include neurosurgery, oncology, radiotherapy specialists, nursing, rehabilitation and supportive-care professionals. Treatment is individualised and may combine brain tumour surgery, radiotherapy and chemotherapy. The plan depends on where the tumour is, how much can be safely removed, tissue findings, molecular features, symptoms and overall health.

Keep copies of scan reports and pathology information, take medicines as prescribed, and tell the team about seizures, steroid effects, blood thinners and changes in function. Ask about rehabilitation for movement, speech, thinking or daily activities, and discuss clinical trials when appropriate.

Seek emergency help for a first seizure, a seizure that does not stop, sudden weakness on one side, new trouble speaking, severe confusion, repeated vomiting, or a rapidly worsening headache with drowsiness. Contact the treating team promptly for new or changing neurological symptoms, fever during treatment, or difficulty taking prescribed medicines.

Ask: Was there an earlier tumour? What did the tissue and molecular tests show? What can surgery safely achieve? How will radiotherapy and chemotherapy be sequenced? Would a clinical trial or rehabilitation referral be suitable?