Medicine Flashcards
(35 cards)
Name the four major types of Parkinson Plus Syndromes.
Progressive Supranuclear Palsy (PSP), Multiple System Atrophy (MSA), Corticobasal Degeneration (CBD), and Dementia with Lewy Bodies (DLB).
What differentiates Parkinson Plus Syndromes from idiopathic Parkinson’s disease?
Poor response to levodopa and the presence of additional neurological signs such as early falls, autonomic dysfunction, or dementia.
What is the hallmark clinical feature of PSP?
Supranuclear gaze palsy, particularly difficulty with downward gaze.
What is the ‘hummingbird sign’ in PSP?
Atrophy of the midbrain on MRI, resembling a hummingbird or penguin in sagittal view.
What is the primary pathological finding in PSP?
Accumulation of tau protein in neurons and glia.
What are the subtypes of MSA?
MSA-P (parkinsonian type)
MSA-C (cerebellar type)
MSA- A (Autonomic type) = Shy Dragger syndrome
Which autonomic dysfunction is a hallmark of MSA?
Orthostatic hypotension.
What is the ‘hot cross bun sign’?
Cross-shaped hyperintensity in the pons on MRI, seen in MSA-C.
Name a distinguishing feature of MSA compared to Parkinson’s disease.
Early autonomic dysfunction and poor response to levodopa.
Which protein accumulates pathologically in MSA?
Alpha-synuclein in oligodendrocytes.
What is the hallmark motor abnormality in CBD?
Asymmetric rigidity and apraxia, often referred to as ‘alien limb syndrome.’
Which cognitive domain is primarily affected in CBD?
Apraxia and visuospatial dysfunction.
What is the typical age of onset for CBD?
Around 60–70 years of age.
Which part of the brain is predominantly affected in CBD?
The parietal cortex and basal ganglia.
What imaging feature supports the diagnosis of CBD?
Asymmetric cortical atrophy, especially in the parietal lobe, on MRI.
What are the core features of DLB?
Fluctuating cognition, visual hallucinations, and parkinsonism.
Which symptom differentiates DLB from Parkinson’s disease dementia?
Early cognitive impairment in DLB, occurring within 1 year of parkinsonism onset.
What type of hallucinations is most common in DLB?
Well-formed visual hallucinations.
Which neurotransmitter system is primarily affected in DLB?
Cholinergic system, leading to cognitive dysfunction.
What is the role of imaging in diagnosing DLB?
SPECT or PET showing reduced dopamine transporter uptake in the basal ganglia.
Name a supportive therapy used in MSA for orthostatic hypotension.
Fludrocortisone or midodrine.
Which non-motor symptom management is crucial in PSP and MSA?
Speech therapy and supportive care for swallowing difficulties.
What are the primary glomerular causes of haematuria?
IgA nephropathy, post-streptococcal glomerulonephritis, membranoproliferative glomerulonephritis
These conditions are classified as intrinsic renal pathology.
Name a secondary glomerular cause of haematuria.
Systemic lupus erythematosus (SLE)
Other examples include small-vessel vasculitis and Henoch-Schönlein purpura.