Glomerular Disease, Facial Swelling & Nephrotic Syndrome Across the Lifespan

Final Year MBBS • Renal Module • Connect glomerular injury with edema, hematuria, investigations, diagnosis, management and complications.

1. THE TOPIC IN ONE CONNECTED FLOW

Glomerular disease becomes easier when the presentation is traced back to the filtration barrier. Protein leakage produces a nephrotic pattern, inflammatory capillary injury produces a nephritic pattern, and persistent injury can eventually cause chronic renal dysfunction. Investigations identify which pathway is dominant and guide treatment and follow-up.

Glomerular Injury

Permeability disturbance or immune inflammation

→

Barrier Dysfunction

Protein and/or red cells enter urine

→

Functional Change

Protein loss or reduced filtration

→

Clinical Pattern

Edema, hematuria, hypertension, oliguria

→

Investigation Pattern

Urine microscopy, protein, creatinine, albumin, complement

→

Management

Treat cause, control fluid/BP, monitor renal function

→

Outcome

Recovery, relapse, thrombosis/infection, or CKD progression

Two key branches:

Protein permeability defect → heavy proteinuria → hypoalbuminemia → reduced oncotic pressure → edema → nephrotic syndrome.

Inflammatory glomerular injury → red-cell leakage + reduced filtration → hematuria + salt/water retention → hypertension, edema and possible renal impairment.

2. KEY CLINICAL CONNECTIONS

Nephrotic Syndrome & Minimal Change Disease

Glomerular protein permeability ↑
→
heavy proteinuria
→
hypoalbuminemia
→
edema.

Typical child + preserved renal function + little active sediment
→
consider minimal change disease
→
corticosteroid-responsive pattern.

PSGN vs IgA Nephropathy

Streptococcal infection
→ latent interval →
nephritic syndrome + low complement
→
PSGN.

Respiratory infection
→ hematuria during/soon after infection →
preserved complement
→
IgA nephropathy.

Investigation → Interpretation → Decision

Red-cell casts
→
glomerular bleeding
→
nephritic process.

Rising creatinine
→
reduced filtration
→
assess severity and complications.

Small echogenic kidneys
→
chronic parenchymal damage
→
chronic disease pathway.

3. AIM HIGH-YIELD INTEGRATION REVIEW

⭐ Heavy proteinuria + hypoalbuminemia + edema
→
nephrotic pattern; in a typical child, minimal change disease is an important diagnosis.

⭐ Hematuria + red-cell casts + hypertension
→
glomerular inflammation and a nephritic pattern.

Periorbital edema
→
renal salt/water retention or reduced plasma oncotic pressure
→
assess urine protein, hematuria, blood pressure and renal function.

⭐ Post-infectious latent interval + low complement
→
supports post-streptococcal glomerulonephritis
→
mainly supportive management with fluid/BP control.

⭐ Hematuria during or immediately after an upper respiratory infection
→
think IgA nephropathy, especially when complement is preserved.

Nephrotic syndrome
→
protein loss and altered coagulation/host defense
→
important complications include thrombosis and significant infection.

Persistent proteinuria + hypertension + rising creatinine
→
progressive glomerular damage
→
chronic kidney disease risk and need for continued monitoring.

Childhood nephrotic syndrome counselling
→
explain recurrence, treatment adherence, urine/follow-up monitoring and danger signs such as fever, respiratory difficulty or markedly reduced urine output.

AIM Exam Trap: Both PSGN and IgA nephropathy can cause glomerular hematuria. The key distinction is the timing in relation to infection: PSGN follows after a latent interval, whereas IgA nephropathy commonly produces hematuria during or shortly after the respiratory infection.