Diagnosis, Classification, Grading & Management

Probable Diagnosis: Kwashiorkor (Protein-Energy Malnutrition)

Fig: (A) Marasmus - severe wasting, no edema. (B) Kwashiorkor - generalized edema, pot belly, apathetic appearance. - Robbins, Cotran & Kumar Pathologic Basis of Disease

Anthropometric Assessment

Note: 78 cm height is severely stunted for a 4-year-old (normal ~102 cm), suggesting chronic malnutrition on top of the acute presentation.

Grading of Malnutrition

1. IAP (Indian Academy of Pediatrics) / Gomez Classification - by Weight-for-Age

2. Waterlow Classification

• Weight-for-height ~86% → Mild wasting (edema is masking true deficit)
• Height-for-age ~76% → Severe stunting

Important: In Kwashiorkor, weight may be falsely elevated by edema fluid, so the true wasting is underestimated by weight-for-height alone. The weight-for-age of 56% placing this in Grade III (severe) is the more reliable indicator here.

3. Wellcome Classification (specifically for Kwashiorkor vs Marasmus)

Type of Malnutrition: Kwashiorkor / Marasmic-Kwashiorkor (SAM)

• Pot belly (hepatomegaly + weakened abdominal muscles + intestinal distension + mild ascites from hypoalbuminemia) ✓
• Discolored hair (depigmentation - loss of color due to protein deficiency) ✓
• Lack of interest/apathy ✓
• Age 4 years (kwashiorkor typical after weaning/displacement by new sibling) ✓

Management

Phase 1: Stabilization (Days 1-7)

• Blood glucose <3 mmol/L: give 50 ml of 10% glucose or sucrose solution orally/NGT
• Feed every 2-3 hours, day and night (do not fast)
• If unconscious: 10% dextrose IV at 5 ml/kg, then switch to oral

• Keep child warm (Kangaroo method - mother's body heat)
• Avoid wet clothing/nappies; cover head

• Use ReSoMal (Rehydration Solution for Malnutrition) - NOT standard ORS (which has too much sodium and can cause fluid overload in SAM)
• 5 ml/kg every 30 min for 2 hours orally/NGT, then 5-10 ml/kg/hr alternating with F-75
• IV fluids ONLY if signs of shock (use Ringer's lactate + 5% dextrose or 0.45% saline + 5% dextrose at 15 ml/kg over 1 hour)

• Potassium: 3-4 mmol/kg/day (critical - cells are depleted)
• Magnesium: 0.4-0.6 mmol/kg/day
• No added sodium (these children are sodium-overloaded intracellularly despite low serum levels)
• Use mineral mix or electrolyte solution added to food

• Even without obvious signs of infection, assume it and treat
• Routine antibiotics: Amoxicillin 25 mg/kg every 12 hours x 5 days (oral) OR Ampicillin 50 mg/kg IM/IV every 6 hours x 2 days then Amoxicillin orally
• If complicated (shock, hypoglycemia, hypothermia, skin lesions, respiratory infections): add Gentamicin 7.5 mg/kg IM/IV once daily x 7 days
• Treat malaria if relevant

• Vitamin A (Day 1): 200,000 IU oral if >12 months; 100,000 IU if 6-12 months; 50,000 IU if <6 months (reduces mortality significantly)
• Folic acid: 5 mg on Day 1, then 1 mg/day
• Zinc: 2 mg/kg/day
• Copper: 0.3 mg/kg/day
• Iron: Do NOT give in stabilization phase (iron feeds bacteria and free radical damage worsens in deficient state); introduce only in rehabilitation phase
• Multivitamins

• F-75 therapeutic milk (75 kcal/100 ml, 0.9 g protein/100 ml) - low protein, low energy intentionally
• 100 ml/kg/day divided into 12 feeds (every 2 hours) on Days 1-2
• Increase to 150 ml/kg/day on Days 3-5 (8 feeds/day)
• If edematous (kwashiorkor): start at 100 ml/kg/day; do not push fluids
• Rationale: Rapid refeeding causes "refeeding syndrome" (fatal shifts in phosphate, potassium, magnesium) - F-75 is deliberately cautious

Phase 2: Rehabilitation (Weeks 2-6)

• Once appetite returns (usually Day 7-10), switch to F-100 (100 kcal/100 ml, 2.9 g protein/100 ml)
• Alternatively: Ready-to-Use Therapeutic Food (RUTF) - Plumpy'Nut (peanut-based, 500 kcal/92g sachet)
• RUTF dose: 200 kcal/kg/day (approximately 1 sachet/5 kg body weight/day)
• Encourage breast milk if still breastfeeding

• Target: weight gain >10 g/kg/day
• If <5 g/kg/day gain after 3 days on F-100: reassess for occult infection, inadequate intake, malabsorption
• Continue until weight-for-height reaches -1 SD (approximately 90% of median)
• Add iron: 3 mg/kg/day in rehabilitation phase only

• Structured play therapy (30 min/day minimum)
• Cheerful, stimulating environment
• Mother/caregiver involvement and education
• Tender loving care

Additional Management Specific to Kwashiorkor

• Edema management: Do NOT give diuretics - edema resolves with protein refeeding and correction of hypoalbuminemia. Diuretics worsen dehydration and electrolyte imbalance
• Albumin infusion: Not routinely recommended (does not improve outcomes and risks fluid overload)
• Hepatomegaly: Fatty liver resolves with protein refeeding - no specific treatment needed
• Skin lesions (if "flaky paint" dermatosis): Zinc ointment, keep moist, avoid harsh soaps
• Hair changes: Will normalize with nutritional rehabilitation over weeks to months
• Monitoring: Daily weight, vital signs, blood glucose 6-hourly in first 48 hours, serum electrolytes, albumin

Discharge Criteria

1. No edema for at least 2 weeks
2. Weight-for-height > -2 SD (>80% of median)
3. Good appetite, eating well
4. No acute illness
5. Caregiver counseled on home feeding

Follow-up

• Weekly for 1 month post-discharge
• Refer to supplementary feeding programs
• Immunization catch-up (OPV, measles vaccine especially - measles in malnourished children is highly lethal)
• IYCF (Infant and Young Child Feeding) counseling for family

Summary Table

IMNCI Classification of This Child

How IMNCI Assesses Malnutrition

IMNCI Classification Table for Malnutrition

Applying IMNCI to This Child

Step 1: Visible Severe Wasting?

• Pot belly is present - in IMNCI, "visible severe wasting" refers to marasmus-type wasting (skin and bones, baggy pants sign). A pot belly in kwashiorkor is NOT counted as "visible severe wasting" in the strict IMNCI definition
• However, this child's true weight is severely depleted and some visible wasting may coexist given weight-for-age of 56%
• Likely: Present (at 56% expected weight, some degree of visible wasting is usually present even with edema)

Step 2: Oedema of Both Feet?

• The pot belly in this child indicates hypoalbuminemia - kwashiorkor causes bilateral pitting oedema of the feet/legs and ascites
• Oedema of both feet = Present (kwashiorkor hallmark)
• This single sign ALONE is enough to classify as Severe Malnutrition under IMNCI

Step 3: Weight-for-Age

• Child: 9 kg, Age: 4 years
• Expected weight for 4-year-old (50th percentile WHO): ~16 kg
• 9 kg corresponds to < -3 SD (severely underweight)

IMNCI Classification Result

🔴 SEVERE MALNUTRITION

• ✅ Oedema of both feet (from kwashiorkor/hypoalbuminemia) - this alone is sufficient
• ✅ Weight-for-age < -3 SD (9 kg at 4 years = severely underweight)
• ✅ Likely visible severe wasting present given degree of underweight

IMNCI Treatment Actions for SEVERE MALNUTRITION

Key Differences: IMNCI vs. Other Classification Systems

IMNCI and Malnutrition Assessment - Corrected & Complete

What the IMNCI Chart Booklet (NHM India) Actually Uses

Where You Are Right - Facility-Based / Updated IMNCI Uses WHZ + MUAC + Bipedal Oedema

Any ONE of these three criteria being met = SAM. They are used as OR conditions, not AND.

Applying All Three Parameters to This Child

1. Weight-for-Height (WHZ)

• Child: 9 kg, height 78 cm
• At 78 cm height, expected median weight (WHO growth standards) = approximately 10.2 kg
• WHZ = (9 - 10.2) / SD ≈ < -3 SD (severely wasted)
• ✅ Meets SAM criterion

2. MUAC

• Not given in the case, but at 4 years with 9 kg weight and severe malnutrition, MUAC is expected to be well below 11.5 cm in true marasmic kwashiorkor
• In kwashiorkor, MUAC may be slightly higher due to oedema masking true muscle loss
• Would need to be measured, but likely < 11.5 cm
• ✅ Likely meets SAM criterion

3. Bipedal Oedema

• Pot belly in this child is due to hypoalbuminemia (kwashiorkor) - this invariably causes bilateral pitting oedema of both feet as well
• Oedema of both feet = Present
• ✅ Meets SAM criterion (this single sign alone = SAM, no other measurement needed)

Final IMNCI Classification

🔴 SEVERE ACUTE MALNUTRITION (SAM)

Criterion met: Bipedal oedema (sufficient alone) + WHZ < -3 SD + likely MUAC < 11.5 cm

Summary of IMNCI Versions - Why the Confusion Exists

• Weight-for-age conflates wasting with stunting and is less specific for acute malnutrition
• WHZ and MUAC are better indicators of current nutritional status and mortality risk
• MUAC in particular is a strong independent predictor of mortality and can be measured without knowing the child's age (which is often unknown in field settings)

Complicated vs. Uncomplicated SAM - IMNCI Classification

The Two-Step Decision

IMNCI Classification Criteria

🔴 COMPLICATED SAM (Pink category - Refer URGENTLY)

🟡 UNCOMPLICATED SAM (Yellow category - Outpatient)

Applying to This Child

Final IMNCI Classification

🔴 COMPLICATED SAM

Immediate Action Required

Determining Weight-for-Height Z-Score (WHZ) in Practice

Method 1: WHO Weight-for-Height Reference Table (Most Common in Field)

1. Measure the child's height (recumbent length if <2 years / <87 cm; standing height if ≥2 years / ≥87 cm)
2. Weigh the child (naked or in minimal clothing, subtract clothing weight)
3. Look up the WHO WFH table - find the child's height in the left column
4. Read across to find the -3 SD weight value for that height
5. Compare: If child's actual weight < the -3 SD value listed → WHZ < -3 SD = SAM

Applying to This Child (Height 78 cm, Weight 9 kg)

• The -3 SD cut-off at 78 cm ≈ 7.8 kg
• Child weighs 9 kg > 7.8 kg → WHZ is approximately -1.3 SD

Important interpretation: WHZ appears only mildly low (~-1.3 SD) because oedema is adding fluid weight, masking the true deficit. The child's real tissue mass is far lower. This is exactly why bipedal oedema takes precedence - a child with oedema is classified as SAM regardless of WHZ reading.

Method 2: MUAC Tape (Quickest Field Tool)

• Wrap the colour-coded MUAC tape around the mid-upper arm (midpoint between shoulder and elbow tip, left arm, arm hanging relaxed)
• Read the colour zone:

• No calculation, no table - takes 30 seconds
• Works without knowing the child's age
• Strong independent predictor of mortality
• Limitation in kwashiorkor: oedema may falsely inflate MUAC, so always check for bipedal oedema separately

Method 3: WHO Anthro Software / App (Facility Level)

• Enter: sex, date of birth, date of measurement, weight, height
• Software automatically calculates WHZ using WHO 2006 Growth Standards
• Available as:
  • WHO Anthro app (Android/PC)
  • iGrowUp app
  • NutriSurvey software
• Gives exact Z-score (e.g., -3.4 SD), not just a cutoff
• Used for documentation and research

Method 4: WFH Z-Score Formula (When No Table Available)

• Median weight = 10.2 kg
• SD (approximate) = 0.9 kg per SD unit
• WHZ = (9.0 - 10.2) / 0.9 = -1.33 SD

Key Practical Points

Summary for This Case

Identifying WHZ < -3 SD Without a Growth Chart

The Two Field Methods

Method 1: MUAC Tape (The Primary Tool)

How to do it on this child:

Child: 4 years old, 9 kg, 78 cm

Step 1: Find the midpoint of the LEFT upper arm
        (halfway between tip of shoulder and tip of elbow)

Step 2: Child's arm hanging relaxed at side

Step 3: Wrap MUAC tape snugly - not tight, not loose
        (you should be able to slide a finger under)

Step 4: Read the number where the tape meets the arrow

Reading the result:

┌─────────────────────────────────────────────┐
│  MUAC TAPE COLOUR ZONES                     │
│                                             │
│  ████████  RED      < 11.5 cm  →  SAM      │
│  ░░░░░░░░  YELLOW   11.5-12.5  →  MAM      │
│  ▒▒▒▒▒▒▒▒  GREEN   ≥ 12.5 cm  →  Normal   │
└─────────────────────────────────────────────┘

Note: In kwashiorkor, oedema may push MUAC slightly higher (e.g., 11.8 cm), which is why bipedal oedema is checked separately and independently overrides any anthropometric reading.

Method 2: Visual Inspection - "Visible Severe Wasting"

What to look for:

VISIBLE SEVERE WASTING (Marasmus signs):

   ✓ Ribs clearly visible and countable
   ✓ "Baggy pants" sign — loose folds of skin
     hanging over the buttocks like a deflated balloon
   ✓ Arm and leg bones outlined under skin
   ✓ Hollowed cheeks / sunken eyes
   ✓ Head appears disproportionately large
     for the wasted body
   ✓ Shoulder blades prominent and "winged"

Now Apply Both Methods to Your Child

The child: 4 years, 9 kg, 78 cm, pot belly, discolored hair, apathy

The Bipedal Oedema Test (Most Important):

PITTING OEDEMA TEST:

  Place your thumb on the DORSUM of the foot
       ↓
  Press FIRMLY for 3 seconds
       ↓
  Release

  Pit remains? → OEDEMA PRESENT
  ┌─────────────────────────────────────┐
  │  OEDEMA PRESENT = SAM              │
  │  No table, no tape, no chart needed│
  │  → Complicated SAM → Refer NOW     │
  └─────────────────────────────────────┘

The Hierarchy of Field Diagnosis (No Charts Needed)

STEP 1: LOOK at the child
        ↓
   Visible severe wasting? (baggy pants, ribs, wasted limbs)
        ↓ YES
        → SAM confirmed → Stop here, refer

STEP 2: PRESS both feet (3 seconds)
        ↓
   Pitting oedema present?
        ↓ YES
        → SAM confirmed (Kwashiorkor/complicated)
          → Stop here, refer URGENTLY

STEP 3: MEASURE MUAC (if steps 1 & 2 negative)
        ↓
   Red zone (< 11.5 cm)?
        ↓ YES
        → SAM confirmed → Refer

For your child, you would STOP at Step 2:

Why This Works - The Logic

• MUAC directly measures muscle mass of the arm - the body's largest protein store. When it falls to < 11.5 cm, global muscle wasting is severe enough to correspond to WHZ < -3 SD with high sensitivity and specificity
• Bipedal oedema is a direct biochemical marker - it cannot occur without severe hypoalbuminemia (albumin < 2.5 g/dL), which only happens in severe protein depletion. There is no "mild" bipedal oedema in a nutritional context
• Visible severe wasting means so much subcutaneous fat and muscle has been lost that it is apparent to the naked eye - this level of wasting is virtually never seen above WHZ -3 SD

Converting % of Median to Z-Score (SD)

The Fixed Relationship (Approximate Rule)

Simple rule to memorize: Weight-for-Height < 70% of median ≈ WHZ < -3 SD

But Your Case Uses Weight-for-Age (56%) - Important Distinction

Applying to This Child Step by Step

Child: 4 years old, weight = 9 kg
Expected weight for 4-year-old = 16 kg (standard reference)

% of median = (Actual weight / Expected weight) × 100
            = (9 / 16) × 100
            = 56%

56% < 60%  →  Weight-for-age Z-score < -3 SD  →  SEVERE

Why the Cutoffs Are at These Numbers

• Growth measurements follow a roughly normal distribution
• The SD (standard deviation) of weight around the median is approximately 10-15% of the median value
• So each -1 SD step down corresponds to roughly 10% drop in weight-for-age

Median (0 SD)  =  100%
   -1 SD       ≈   90%   (lost ~10%)
   -2 SD       ≈   80%   (lost ~20%)  → this is why 75-89% ≈ -1 to -2 SD
   -3 SD       ≈   70%   (lost ~30%)  → for WFH: <70% = SAM
                  ~60%                → for WFA: <60% = SAM (Gomez Grade III)

Quick Memory Aid

FOR WEIGHT-FOR-HEIGHT (Wasting / SAM):
   < 70% of median  →  < -3 SD  →  SAM

FOR WEIGHT-FOR-AGE (Gomez / Underweight):
   < 60% of median  →  < -3 SD  →  Grade III / Severe

FOR HEIGHT-FOR-AGE (Stunting):
   < 85% of median  →  < -3 SD  →  Severe stunting

Summary for Your Child

Wellcome Trust Classification - When and Why to Use It

What Makes It Unique

The Classification Table

Applying to Your Child

Weight-for-age = 56%  →  falls in < 60% row
Oedema         = PRESENT (pot belly = hypoalbuminemia = bipedal oedema)
                         ↓
              MARASMIC-KWASHIORKOR

When Do We Use It?

✅ Use Wellcome Trust When You Need To:

• Gomez tells you the grade (severity) but not the type
• Waterlow tells you about wasting and stunting but not oedema
• IMNCI tells you complicated vs uncomplicated but merges all types
• Only Wellcome Trust separates Kwashiorkor from Marasmus from the overlap

• MCQs and clinical case discussions in medical curricula almost universally use Wellcome Trust to type PEM
• It is the standard classification taught in paediatrics and community medicine textbooks

• When researchers want to report the distribution of kwashiorkor vs marasmus in a population

• Oedema = protein compartment is depleted (visceral protein gone)
• No oedema = energy depleted but some visceral protein preserved
• This distinction has direct pathophysiological and prognostic significance

What Wellcome Trust Does NOT Tell You

Summary - Each Classification and Its Purpose

For Your Child - All Classifications Applied Together

Why This Child is WHO Category: Severe Acute Malnutrition (SAM)

WHO Definition of SAM

The Direct Answer

Bipedal oedema is present.

Why "Acute" Specifically?

Height 78 cm at 4 years → severe stunting → chronic malnutrition
Weight  9 kg at 78 cm  → wasting (masked by oedema) → acute malnutrition
Oedema present         → active kwashiorkor → acute malnutrition

Why Not "Moderate Acute Malnutrition (MAM)"?

One-Line Summary