How do patients with parkinsonism present? A clinicopathological study

Area of Science:

• Neurology
• Neuroscience
• Pathology

Background:

• Early neurodegenerative parkinsonism presents subtly with non-motor symptoms, complicating diagnosis.
• Accurate early diagnosis is challenging due to overlapping autonomic, sensory, and psychic symptoms.

Purpose of the Study:

• To retrospectively assess the initial clinical presentation and referral patterns of parkinsonism subtypes.
• To identify common misdiagnoses and diagnostic delays in Parkinson's disease (PD), progressive supranuclear palsy (PSP), and multiple system atrophy (MSA).

Main Methods:

• Retrospective analysis of 494 patients with pathologically confirmed parkinsonism (PD, PSP, MSA) from the Queen Square Brain Bank.
• Examined initial clinical features, referral patterns, and early diagnoses recorded for each patient.

Main Results:

• 44% of patients were initially referred to a neurologist; others saw various specialists.
• PD patients were misdiagnosed with musculoskeletal or urological conditions; PSP patients with ophthalmological issues; MSA patients with urological issues.
• Common early misdiagnoses included frozen shoulder, degenerative spine disease, and benign prostatic hypertrophy for PD; PD and spinal disease for PSP; and bladder outlet obstruction for MSA.

Conclusions:

• The protean and non-specific early clinical features of PD, PSP, and MSA lead to diverse specialist referrals and potential misdiagnosis.
• Specialists encountering conditions like frozen shoulder, benign prostatic hypertrophy, or depression should consider early parkinsonism and assess for subtle motor abnormalities.