Examkin

Soru

Zorluk: OrtaNephrology

Match each clinical presentation of glomerular disease with its most characteristic renal biopsy or immunofluorescence finding.

  • A 24-year-old man with episodic gross hematuria occurring concurrently with viral upper respiratory tract infections.Mesangial immune complex deposition of IgA and C3
  • A 9-year-old boy with hypertension, periorbital edema, and dark urine two weeks after resolving impetigo.Subepithelial electron-dense humps on electron microscopy
  • A 30-year-old man presenting with acute kidney injury, hemoptysis, and bilateral alveolar infiltrates.Linear deposition of IgG along the glomerular basement membrane
  • A 65-year-old man with a history of colon adenocarcinoma presenting with severe peripheral edema, proteinuria of 4.5 g/day, and hypoalbuminemia.Subepithelial immune complex deposits with a 'spike and dome' appearance

Cevap

IgA nephropathy matches with mesangial IgA deposition; PSGN matches with subepithelial humps; Goodpasture syndrome matches with linear IgG deposition; Membranous nephropathy matches with subepithelial 'spike and dome' deposits.
Each clinical scenario distinctly describes a specific glomerular disease that corresponds precisely to a unique pathological finding: IgA nephropathy correlates with mesangial deposits, PSGN with subepithelial humps, Goodpasture syndrome with linear IgG deposition, and membranous nephropathy with a spike and dome pattern.

Adım Adım Çözüm

1
Analyze the first clinical vignette regarding the timing of hematuria relative to the upper respiratory infection.
The concurrent nature of the hematuria and infection identifies IgA nephropathy.
Synpharyngitic hematuria differentiates IgA nephropathy from post-infectious etiologies, and is confirmed by mesangial IgA deposition on biopsy.
2
Evaluate the second presentation involving a pediatric patient with delayed-onset hematuria and edema following a skin infection.
The distinct latency period of two weeks points to poststreptococcal glomerulonephritis (PSGN).
PSGN requires time for immune complex formation and deposition, classically forming subepithelial humps visible on electron microscopy.
3
Assess the third patient presenting with rapidly progressive pulmonary-renal syndrome.
Hemoptysis combined with acute kidney injury strongly suggests Goodpasture syndrome.
Anti-glomerular basement membrane (anti-GBM) antibodies attack both alveolar and glomerular basement membranes, yielding a linear IgG immunofluorescence pattern.
4
Examine the adult patient with nephrotic range proteinuria and an underlying malignancy.
The clinical picture correlates with membranous nephropathy.
Solid organ tumors are classic secondary causes of membranous nephropathy, which reveals subepithelial deposits generating a 'spike and dome' appearance on silver staining.

Anahtar Kavram

Identifying primary and secondary glomerular diseases based on their classic clinical presentations and pathognomonic histopathological findings.
Tahmini Süre:1m 30s
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Konular

Nephrology

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