A 3-year-old child from rural Uttar Pradesh presents with severe wasting, loss of subcutaneous fat, and prominent ribs. On examination, the child is alert and playful with normal mental status. Which of the following clinical features is NOT typically seen in this presentation of protein-energy malnutrition?

## Classification of Protein-Energy Malnutrition This clinical presentation describes **marasmus** (protein-energy malnutrition with predominantly energy deficiency), characterized by severe wasting without edema. ### Key Features of Marasmus vs Kwashiorkor | Feature | Marasmus | Kwashiorkor | |---------|----------|-------------| | **Primary deficiency** | Energy (calories) | Protein | | **Onset** | Gradual, chronic | Acute, subacute | | **Edema** | Absent | Present (pitting) | | **Moon facies** | Absent | Present | | **Wasting** | Severe | Mild to moderate | | **Subcutaneous fat** | Lost | Preserved | | **Hair changes** | Loss, thinning | Flag sign, easy pluckability | | **Hepatomegaly** | Mild | Marked (fatty) | | **Mental status** | Alert, playful | Apathetic, irritable | | **Skin changes** | Dry, thin | Dermatitis, hyperpigmentation | **Key Point:** Edema and moon facies are hallmark features of **kwashiorkor** (protein deficiency), NOT marasmus. The presence of alert mental status and absence of edema in this case confirms marasmus. ### Clinical Features Present in Marasmus 1. **Severe wasting** — loss of muscle mass and subcutaneous fat 2. **Hepatomegaly** — due to fatty infiltration (from impaired protein synthesis) 3. **Hypoglycemia** — depleted glycogen stores and impaired gluconeogenesis 4. **Hypothermia** — reduced metabolic rate and heat production 5. **Hair changes** — thinning, loss of elasticity, depigmentation 6. **Normal or alert mental status** — distinguishes from kwashiorkor **High-Yield:** The **absence of edema and moon facies** is the key differentiator of marasmus from kwashiorkor. These are protein-deficiency features, not energy-deficiency features. **Clinical Pearl:** A child with marasmus may appear "old" or "wizened" due to loss of subcutaneous tissue, but retains cognitive alertness. Kwashiorkor children appear "puffy" (edema) with apathy and irritability. **Warning:** Do not confuse the two forms — marasmus = wasting without edema; kwashiorkor = edema with preserved fat.