Synopsis
Recognise symptom patterns that may indicate an intracranial mass, distinguish emergency deterioration from an urgent diagnostic presentation, and select age-appropriate imaging and referral without relying on headache alone.
- An intracranial mass may present through focal dysfunction, seizure, cognitive or personality change, raised intracranial pressure, or an incidental scan; headache alone is neither necessary nor diagnostic.
- Separate emergency mass effect from urgent diagnosis: deteriorating consciousness, pupils, motor response or breathing needs immediate resuscitation and neurosurgical escalation, while progressive subacute central neurological loss in a stable adult warrants urgent direct-access MRI.
- Age changes the pathway: NICE NG12 addresses adult imaging and very urgent referral for children and young people, while NG127 gives same-day red-flag headache criteria for children under 12.
Key red flags
Progressive subacute loss of central neurological function in an adult, including new focal weakness, language disturbance, visual change, cognitive change or gait impairment.
A first seizure, a new focal-onset seizure, persistent deficit after a seizure, or failure to regain the person’s usual level of consciousness.
Headache with progressive worsening, vomiting, papilloedema, altered consciousness, focal deficit, personality change or a clear change from an established headache pattern.
In a child, newly abnormal cerebellar or other central neurological function; NICE advises very urgent specialist referral for suspected brain or CNS cancer.
In a child under 12, headache on waking or waking from sleep, progressive headache, vomiting, ataxia, lethargy, altered consciousness, squint or impaired upward gaze requires same-day assessment.
Known cancer with new headache, seizure, focal deficit, cognitive change or imbalance raises concern for brain metastasis even when systemic disease appears controlled.
Establish the first symptom, rate of evolution and direction of change. Progressive loss over days to weeks is more concerning than a stable lifelong feature; abrupt deterioration may reflect haemorrhage, seizure, acute hydrocephalus or herniation and changes the response immediately.
Characterise onset, awareness, automatisms, lateralising movements, duration, recovery and residual deficit. A focal-onset seizure may be the first manifestation of a cortical mass; prolonged seizure or incomplete recovery is an emergency rather than a routine tumour clinic referral.
Reasoning priorities
Identify deterioration and localisation through consciousness, pupils, cranial nerves, language, visual fields, limbs, coordination and gait.
A worsening component or new focal sign can matter more than a stable total score. A normal snapshot does not exclude intermittent seizure-related or slowly progressive dysfunction; document the baseline and exact time of change.
Worked reasoning
An adult develops several weeks of worsening unilateral hand clumsiness, word-finding difficulty and a changed headache pattern but remains physiologically stable.
- Confirm the progressive central neurological syndrome through onset, trajectory, collateral history and a documented examination covering language, visual fields, cranial nerves, power, sensation, coordination and gait.
- Screen immediately for features that change the pathway—falling consciousness, seizure without recovery, new pupil abnormality, rapid motor decline or cardiorespiratory instability—and transfer to emergency resuscitation if any appear.
- If stable, arrange urgent direct-access contrast-enhanced brain MRI under the adult NICE NG12 pathway, using CT when MRI is contraindicated or cannot be obtained safely.
- At first radiological diagnosis, discuss promptly with the appropriate neuroscience or neuro-oncology multidisciplinary team; they determine further imaging, systemic staging and whether tissue is required.
- Verify completion through a named result owner, explicit patient safety-netting and review of any interval neurological change; worsening symptoms override the original routine timescale.