Match each clinical presentation with its underlying pathophysiologic mechanism or characteristic pathologic finding.
- A 32-year-old man reports chronic, insidious-onset low back pain and stiffness that is worst in the morning, improves significantly with physical activity, and occasionally awakens him in the second half of the night.Enthesitis leading to progressive fibrosis and ossification of the axial skeleton, strongly linked to the HLA-B27 allele.
- A 26-year-old woman of Mediterranean descent presents with painful, recurrent aphthous ulcers in her mouth and on her labia, accompanied by recent visual disturbances and anterior uveitis.Systemic small-to-medium vessel vasculitis characterized by immune complex deposition, neutrophil hyperfunction, and the pathergy phenomenon.
- A 48-year-old woman develops symmetric, proximal muscle weakness making it difficult to comb her hair, accompanied by a violaceous periorbital eruption and scaly plaques on the extensor surfaces of her metacarpophalangeal joints.Complement-mediated microangiopathy leading to ischemic damage of muscle fibers, characteristically producing perifascicular atrophy.
- A 42-year-old woman describes months of widespread, achy musculoskeletal pain, profound fatigue, unrefreshing sleep, and tenderness at multiple points, with entirely normal laboratory inflammatory markers.Abnormal central pain processing and sensitization of pain pathways without objective evidence of peripheral tissue inflammation or damage.
Cevap
The correct pairings match each patient's clinical presentation to the underlying disease pathophysiology: the man with inflammatory back pain has Ankylosing Spondylitis (driven by enthesitis), the woman with recurrent ulcers has Behçet syndrome (a systemic vasculitis with pathergy), the woman with muscle weakness and rash has Dermatomyositis (complement-mediated microangiopathy), and the woman with widespread pain without inflammation has Fibromyalgia (central sensitization).
Each vignette represents a classic presentation of a distinct rheumatologic disorder, perfectly aligning with one distinct pathophysiologic mechanism provided in the options. Diagnosing the condition based on the constellation of symptoms allows for direct correlation to its pathologic basis.
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Anahtar Kavram
Pathophysiologic mechanisms of common rheumatologic and autoimmune conditions.