Can meningioma present initially with psychiatric symptoms in otherwise healthy adults?

Can Meningioma Present with Psychiatric Symptoms?

Yes, meningiomas can present initially with psychiatric symptoms as the sole manifestation, occurring in approximately 21-35% of cases, and this presentation should prompt neuroimaging even in the absence of neurological signs. 1, 2, 3

Frequency and Clinical Significance

• Psychiatric symptoms occur as the presenting feature in 21-35% of supratentorial meningiomas, representing a substantial minority that can lead to delayed diagnosis if not recognized 2, 3
• In one retrospective analysis of 72 meningioma patients, 21% presented with purely psychiatric symptoms without any neurological signs, emphasizing that the absence of focal neurological findings does not exclude meningioma 3
• The diagnosis is frequently delayed by months when only psychiatric manifestations are present, with patients often being treated in psychiatric settings before the underlying tumor is discovered 1, 4

Location-Specific Psychiatric Presentations

Frontal Lobe Meningiomas

• Frontal convexity meningiomas predominantly present with depression (45.5% of frontal meningiomas have psychiatric symptoms) 2
• Basifrontal and sphenoid wing meningiomas cause mania, depressive symptoms, or organic personality disorders 2
• Larger frontal meningiomas (>35cc volume) have significantly higher rates of psychiatric symptoms compared to smaller lesions 2

Temporal Lobe Meningiomas

• Temporal meningiomas have the highest frequency of psychiatric symptoms at 60%, typically presenting with organic delusional disorder 2

Other Locations

• Suprasellar meningiomas present with organic delusional disorder 2
• Medial cranial fossa meningiomas can present with mixed anxiety disorder, dissociative symptoms, and vertigo 4

Spectrum of Psychiatric Manifestations

The psychiatric presentations are diverse and include: 1, 5, 4

• Mood symptoms (depression, mania, bipolar-like presentations)
• Psychotic symptoms (delusions, hallucinations)
• Personality changes and organic personality disorders
• Cognitive impairment and memory disturbances
• Anxiety disorders and obsessive-compulsive symptoms
• Dissociative symptoms and depersonalization
• Anorexia nervosa in rare cases

Critical Diagnostic Red Flags

Brain imaging should be performed when the following features are present: 1, 4, 3

• New-onset psychiatric symptoms in patients over 50 years of age (fifth decade is typical for meningioma presentation with psychiatric symptoms) 3
• Atypical psychiatric symptoms that don't fit classic psychiatric syndrome patterns 1
• Treatment-resistant psychiatric symptoms despite appropriate psychiatric interventions 1, 4
• Any accompanying neurological symptoms, even subtle ones such as headache, seizures, diplopia, or urinary incontinence 1
• Sudden onset or rapid progression of psychiatric symptoms 1

Common Diagnostic Pitfalls

• The absence of neurological signs does not exclude meningioma - psychiatric symptoms can be the only manifestation for weeks to months 3
• Normal neurological examination can provide false reassurance - one case series showed 21% of meningiomas presented with isolated psychiatric symptoms and intact neurological exams 3
• Assuming psychosomatic etiology for medically unexplained symptoms (such as vertigo with intact vestibular examination) can delay diagnosis 4
• Failure to image younger patients - while meningiomas are less common in young adults, they tend to be larger at presentation and can cause more prominent symptoms 6

Prognosis After Surgical Intervention

• Surgical excision results in complete or partial improvement of psychiatric symptoms in 85% of patients (45% complete resolution, 40% partial improvement) 2
• No patients developed new psychiatric symptoms after surgery in one prospective series, indicating that surgical intervention carries low risk of worsening psychiatric status 2
• Quality of life improves significantly after tumor excision, even in cases with longstanding psychiatric symptoms 5

Practical Clinical Approach

For any patient presenting with new-onset psychiatric symptoms, particularly those over 50 years or with treatment resistance, obtain MRI with contrast as the gold standard imaging modality. 6 This is especially critical when:

• Affective symptoms appear suddenly in middle-aged adults without prior psychiatric history 3
• Personality changes accompany mood symptoms 5, 2
• Cognitive decline is progressive despite psychiatric treatment 5

The key principle is maintaining a low threshold for neuroimaging in psychiatric presentations, as the potential morbidity from delayed diagnosis of a treatable structural lesion far outweighs the cost and inconvenience of imaging. 1, 3