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Summary Pediatric Nephrology 1: hematuria, nephrotic and nephritic mind map

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A clear and structured nephrology mind map that summarizes the key clinical patterns of hematuria, nephrotic syndrome, and nephritic syndrome. It visually organizes causes, pathophysiology, major clinical features, investigations, and essential differences between these renal conditions. Designed to simplify complex nephrology concepts into an easy-to-review format for quick understanding and exam preparation.

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🔹
Types of hematuria:
Gross hematuria:
seen with the naked eye as red, brown or smoky urine depending on the

🔹> 5Microscopic
amount of red cells.
hematuria:
red cells/high power field (HPF) in centrifuged freshly voided
sample of urine (10ml).
it may be:
🔸
Defnition
The neprotic syndrome (NS) is a glomerular disorder characterized by freq uent remission andrelapses
and consisting of a tetrad of:
– Asymptomatic (silent)
– Symptomatic (accompanied by other manifestations as edema, fever,
etc.)Hyperttension
– Proteinuria (mainly albuminuria) > 1gram/ m2/24 hours.Selective proteinria of low molecular weight
protein
– Hypoproteinemia (mainly albumin): total s.protein<5.5 g/dl & s. albumin <2.5 g/dl.
– Hypercholesterolemia: >220 mg/dl Due loss of lipase enzyme, and loss protein the liver makes proteins 🔹
Causes of heamturia:
Glomerular diseases:
– Acute poststreptococcal glomerulonphritis.
including lipoprotiens
– Edema. – Recurrent gross hematuria syndrome:
1• IgA nephropathy.
2• Benign familial (idiopathic) hematuria.
Classification
1. Idiopathic nephrotic syndrome ( classical NS occurring in 90% of cases) 🔹
3• Alport syndrome With deafness .

🔹 Membranous glomerulopathy
A. Minimal change nephrotic syndrome (MCN S): 77% of cases. ‫أشهرهم‬
B . NS with mesangial proliferation: 4% of cases.
🔹
🔹
Membranoproliferative glomerulonephritis.
Hemolytic-uremic syndrome.
C. Nephrotic syndrome with focal segmental glomerulosclerosis: 9 % of cases. 🔹
🔹
Nenoch-shonlein (anaphylacttoid) purpura.
Systemic lupus erythematosus .
2.Secondary nephrotic syndrome: (10% )
(nephritis then progress to nephrotic)
🔹
🔹
N ephritis of chronic infection.
Rapidly progressive glomerulonphritis.
i.Glomerulonephritis (most commonly).
– Membranous glomerulopathy.
🔹 Goodpasture disease.
Infection (bacterial, tuberculosis, viral, schistosomoasis).
• Exercise-induced hematuria.
– Membrano proliferative glomerulonphritis. • Traumatic
i. Other causes:
a.Chronic infections: schistosoma, hepatitis, malaria, syphilis.
b.Systemic disease: SLE , Henoch-schönlein purpura, sickle cell dis., diabetes.
🔹
• Stones and hypercalcuria.
Hematologic:
It can make red urine but not hematuria*
c. Malignancies: Wilms tumor. – Thrombocytopenia
d. Drugs: mercurials, penicillamine, trimethadione, gold salts. – Coagulopathies.
e. Allergies: bee sting, serum sickness. – Sickle cell nephropathy.
3- Congenital NS
very rare, autosomal recessive, presenting at birth or during 1st 6 months
Hematuria
🔹
– Renal vein thrombosis.
congenital abnormalities:
• Polycystic kidneys.
• Hydronephrosis due to pelvi-ureteric obstruction.
Pathology
3 main morphologic patterns:
1)Minimal change NS: (85% oftotal cases)
🔹
• Vascular abnormalities.

🔹 Tumors: e.g. Wilms tumor(most common)
Drugs: e.g. (cyclophosphamide: cause Hemorrhagic cystitis ) ,
2)Mesangial proliferation: (5% oftotal cases) chloroquine, metronidazole, rifampicin, phenolphthalein
3) Focal segmental sclerosis (10 %of total cases)
Pathophysiology
• Proteinuria: Work-up of a child with hematuria
• Edema:
• Hyperlipidemia:
• History: present, past, family.
• Physical examination stressing on:
– Height, weight, blood pressure, optic fundi.
– Skin: edema, rash, purpura, ecchymosis (to exclud SLE ,PSAGA)
– Abdominal masses, ascites.
• Laboratory:
– U rine analysis, urine culture.
– Protein and calcium in 24 hours urine.
– Complete blood picture.
– B lood urea, creatinine, complement (C3)
– Rapid slide test for streptococcal antigens.
• Nephrosonogram and /or IV pyelogram
Diagnosis of hematuria:
1.Edema (severe) • Is the color of urine due to blood?
• is the usual presenting manifestation. • Is this true hematuria (red blood cells) orhemoglobinuria /
• Start as periorbital puffiness + pitting edema of lower limbs. myoglobinuria?Truma or convulsions
• Progresses to generalized edema →weight gain ±↓ urinevolume. • Is the hematuria of renal or non-renal origin?
• May be associated with ascitis ± pleural effusion ± edema of genitalia. • What caused the hematuria?
• More in dependent parts: back (if recumbent), abdominal wall, perineum, scrotum Clinical manifestations
, legs (if sitting) • Commonest type of N S: MCNS
• Age: peak incidence between 2-6 years, can occure in 1st year
-The important part we must see the edema is the scrotum‫ ال‬genitalia ‫قالت حتى مهم‬ or in adult (uncommon)
‫باالمتحان العملي‬ • Sex: more in Boys, male: female ratio = 2: 1
🔹 Weight gain: due to accumulation of edema.
2.Diminished urine output: may occur with development of edema.
•Response to prednisolone
•The initial attack and subsequent relapsesmay follow a viral
3.Pain and respiratory difficulty: due toascitis and plural effusion and upper respiratory infection.
pulmonaryedema.
4. Diarrhea: due to edema of intestine wall.
5. Blood pressure: hypertension is uncommon, if we found Hypertension it must
looking for other cause than MCN S

Definition: (Type 3 immune reaction )
🔹urine analysis
Laboratory finding
AGN is an acute diffuse inflammatory disease of glomeruli mediated
– amount: normal or ↓
– appearance : clear ,if boiled → turbidity
Renal Diseases 1 by immune complex deposition and presenting as acute nephritic
syndrome
– specific gravity : ↑ It is a clinical complex of acute onset characterized by:
– proteins :>1 g/m2/24 hours ,or 3+ to 4+ bydipstick • Hematuria with RB C casts in urine
– proteinuria is of selective type (mainly albumin + low molecular weight proteins ) Nephrotic Syndrome • Oliguria• Azotemia• Hypertension
🔹
– microscopically: hyaline casts ± transient microscopic hematuria.
Serum and blood :
– Total plasma proteins: < 5.5 g/dl.
• Mild proteinuria (<1 gram/day ) It's severe in nephrotic syndrome
• Edema ( usually mild )
– Serum albumin: <2.5 g/dl.
– Serum cholesterol: >220 mg/dl. Etiology
– Serum triglycerides ↑. Deposition of immune complex these complexes may be:
• Post-infectious (exogenous antigen) Post
– Total serum Calcium ↓ due to reduction in albumin-bound fraction.
streptococcal glomerulonephritis and
– Normal complement C3. • non Post streptococcal glomerulonephritis: like
– Hematocrite and hemoglobin may be ↑. bacterial,viral , fungal, parasitic ,

🔹
– Erythrocyte sedimentation rate may be ↑.
renal functions:
• Non-infectious (endogenous antigen)Antigen

🔸
_antibody reaction
Post streptococcal acute glomerulonphritis
– Creatinine clearance may be ↓due to ↓ renal perfusion (hypovolemia).
(PSAGN)the commen one
🔹
– Blood urea may be slightly ↑ due to ↓ renal perfusion (hypovolemia).
Renal biopsy is not required for diagnosisin most children.Children with: hematuria, hypertension, renal
insufficiency, hypocomplementemia, age < 1 year or > 8 years should be considered for renal biopsy
before treatment .
Definition:
PSAGN represent the classical "acute nephritic syndrome".
It is due to non-bacterial inflammation of the glomeruli secondary to a
Complications previous group A β-hemolytic streptococcal (GABHS) infection of
1. Increased susceptibility to infection. pharynx or skin.
2. Arterial or venous thrombosis **BurThe most common nephropathys is IGA ** ‫إمتحان سؤال‬

🔶 Why are nephrotic patients more susceptible to infection?
• Edema fluid in tissues is a good culture medium. Epidemiology:
• Hypoproteinemia. – Age: >3 years, usually 5-10 years.
• ↓ Immunoglobulin levels. – Sex: male: female ratio 2:1
• Impaired T-cell function.
• ↓ Bactericidal activity of leukocytes. Etiology:
PSAGN occurs1-3 weeks after infection of pharynx or
• ↓ complement activity.But its normal value skin(impetigo\pyoderna)"with certain "nephritogenic" strains of GABHS
• Loss of complement factor in urine (Properdin factor B that opsonize certain bacteria). (serotypes12,49.et)
• ↓Splenic function.
• Immunosuppressive therapy.

🔶
• Thrombo-embolic complications
The risk of thrombosis is related to:
a-Increase prothrombotic factors:
pathogenesis:
it is mediated via immune complex.
-Fibrinogen -Thrombocytosis -Hemo-concentration -Relative immobilization -Sterpotococcal antigen and its antibody make an antigen-antibody
b-Decrease fibrinolytic factors: complex-->activation of Complement and Deposition of both
-Urinary losses of anti-thrombin III, Proteins C and S. complexs and complement in the basement membrane of glomeruli
and in mesangium -->infammatory reaction.

5- Specific therapy:
Acute glomerulonephritis • Clinical picture:
• Induction:
oral prednisone 60 mg /m2/day dividedin 3 doses until urine free for 3 cosecutive days
Post streptococcal acute 1. Asymptomatic PSAGN :
• Maintenance: glomerulonphritis (PSAGN) presenting only with asymptomatic microscopic hematuria
2. Classical presentation with the nephritic triad of :
Oral prednisone 60 mg / m2 every other day (singledose) for 6 weeks.45 mg / m2 every other day (single
• Edema: in 75 % of cases
dose) for 2weeks.30 mg / m2 every other day (single dose) for 2weeks.15mg / m2 every other day (single
• Gross hematuria: in 65 % of cases
dose) for 2weeks.G radual withdrawal over 2 weeks.
• Hypertension: in 60 % of cases
🔶
🔸 Patient may be classified according to their response to prednisone into 4 types:
» steroid responsive:
• This may be accompanied by systemic manifestation as: mild fever,
headache, anorexia, nausea, vomiting, and abdominal pain.
3-Presentation by complication (s):
respond to prednisone in 1-4 weeks (usually 2 weeks),remission is maintained during alternate day
• hypertensive encephalopathy (Convulsion ‫)يدخل‬
🔸
therapy.
» steroid dependent:
respond to daily dose and relapse on altemate day therapy or within 4 weeks of discontinued of
• Heart failure and pulmonary edema
• Acute renal failure
prednisone.

🔸
Renal biopsy is indicated.
» steroid resistant:
proteinuria 2+ or greater after 8 weeks of daily prednisone therapy.
• Laboratory findings
1.Urinary changes:
– Volume : oligouria ( urine volume <400 ml/m2/24 hours)
🔸
renal biopsy is indicated and cytotoxic drugs are given.
» frequent relapsers :(Protienuria +edema)
patient who respond well to prednisone therapy but relapse 4 or more times in a 12 month period
by fatema okoff – Color :normal, microscopic or gross hematuria→ smoky , red, tea-or
cola-colored
– Specific gravity ↑ Oliguria
6- Cytotoxic drugs:
🔸 Indications:
o Frequent relapsers and steroid dependence
– Mild to moderate proteinuria ( < 1 gm / m2/24 hours )
– Microscopically( in freshly voided sample ): red blood cells,
↑polymorphonuclear leukocytes,casts (red cell casts, granular casts )
o Corticosteroid toxicity 2-Blood:
Treatment of NS
🔸
o Steroid resistant NS
What to use:
Cyclophosphamide 3 mg/kg/day in a single daily dose for 8-12 weeks + ample fluids.
The principles lines of treatment are:
– Effort to reduce edema.
• Mild normochromic anemia ( due to hemodilution )
• ↑ Erythrocyte sedimentation rate( ESR)‫النه‬infection
maintenance dose: ‫يوم ايوه و يوم ال‬ – Specific therapy with prednisone. • ↓Serum complement ( C3) level
🔸 Alternate-dayprednisone therapy is ofen continued during the
1- Hospitalization, investigations and exclusion of contraindications to steroids.
2-Physical activity: not restricted, as tolerance by child.
• Serum protein : normal or slight ↓ ( due to hemodilution
• Blood urea usually dl ↑( normal < 40 mg /dl)
🔸
course of cyciophosphamide therapy.
Toxicity and side effects;
alopecia, sterility, disseminated varicela, hemorhagic cystitis, leucopenia (do weekly WBC count
3-Diet and fluids: if edema is severe
– Salt: do not add salt to diet or restrict it to 2g/day until edema resolves. • Serum creatinine : usually ↑( normal < 0.7 mg/ dl)
• ↓Creatinine clearance
– Water: moderate restriction.
&stopdrugs if WBCs <5000/mm”). 3-Evidence of recent GABHS infection:
7-all children with NS should receive polyvalent pneumococcal vaccine.
It may be given once the chid is in remission and off of daily prednisone
🔹
4- Diuretics: are used cautiously
For mild edema: • Positive throat cultures
• Streptozyme rapid slide test for detection of antibodies to GABHS
therapy. 🔹
Hydrochlorothiazide 2-4 mg/kg/day in 2 divided doses + spironolactone 3-5mg/kg/day in divided doses
For marked edema:
oral furosemid (lasix) 1- 2mg/kg/dose every 4 hours + Metolazone (zaroxolyn) 0.1-0.2 mg/kg/12 hours. N ot I.V
• ↑ASO titer (in throat infection only), ↑anti-DNase B antibodies.


🔸
Prognosis ofsteroid-responsive MCNS:
Repeated relapses with complete spontaneous resolution by
🔸
Treatment
No specific treatment. Prognosis
🔸
the end of 2nd decade.

🔸 No residual renal dysfunction • Hospitalization and monitoring
• Restriction of activity In complection
• Complete recovery in > 95% of cases G ood
prognosis
🔸 Notheloss of fertility(unless cyclophosphamide was used)
diseases is not hereditary • Diet No restrictions except in oliguric phase
• Treatment of streptococcal infection
• Infrequent : glomerular hyalinization →chronic
renal failure
• 5-Treatment of hypertension 10 days must with • Death from complications can occur in acute
penicillin ‫الزم‬ stage if not properly treated.
• Recurrences are extremely rare .If recurrent
• Treatment of heart failure andpulmonary edema we must Think other cause than streptococcal
• Treatment of acute renal failure

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Geschreven in
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