Evaluate the following distinct patient presentations involving peripheral nerve and spinal cord dysfunction. Match each clinical scenario to its most likely underlying pathophysiologic etiology.
- A 55-year-old man with a 15-year history of poorly controlled type 2 diabetes presents with progressive, symmetric burning pain and numbness in his feet, absent ankle reflexes, and frequent episodes of lightheadedness upon standing.Length-dependent axonal degeneration with autonomic involvement
- A 38-year-old woman develops progressive, symmetric ascending weakness of her lower extremities and absent deep tendon reflexes over three days, roughly two weeks after an episode of Campylobacter jejuni gastroenteritis.Immune-mediated acute inflammatory demyelinating polyradiculoneuropathy
- A 68-year-old man who underwent a Roux-en-Y gastric bypass 5 years ago presents with insidious onset of distal paresthesias, unsteady gait with a positive Romberg sign, and hyperreflexia in the bilateral lower extremities.Demyelination of the dorsal columns and lateral corticospinal tracts
- A 52-year-old man with a history of untreated hepatitis C virus infection presents with asymmetric, painful motor and sensory deficits involving the right peroneal nerve and left ulnar nerve, accompanied by palpable purpura on his lower legs.Immune complex deposition leading to vasa nervorum inflammation
Cevap
The correct pairings match each patient's specific constellation of symptoms, chronological progression, and past medical history to the distinct pathophysiologic mechanism of their neurological dysfunction.
Correct matching requires synthesizing the chronological onset, symmetry, accompanying physical exam findings, and relevant past medical history to arrive at the precise pathophysiologic diagnosis for each patient's presentation.
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Anahtar Kavram
Formulating a differential diagnosis for peripheral neuropathies requires integrating the temporal course (acute vs. chronic), symmetry (symmetric vs. mononeuritis multiplex), presence of upper vs. lower motor neuron signs, and associated systemic findings (e.g., purpura, diabetes, malabsorption).