A 2-year-old child from rural India presents with severe wasting, loss of subcutaneous fat, and skin changes. On examination, the child has a wizened appearance with prominent ribs and sparse hair. Which is the most common form of protein-energy malnutrition in this clinical presentation?

Explanation

## Diagnosis: Marasmus **Key Point:** Marasmus is the most common form of protein-energy malnutrition (PEM) globally, particularly in developing countries like India, and presents with severe wasting without edema. ## Clinical Features of Marasmus | Feature | Marasmus | Kwashiorkor | |---------|----------|-------------| | **Onset** | Gradual (months) | Acute (weeks) | | **Wasting** | Severe (loss of muscle & fat) | Moderate | | **Edema** | Absent | Present (pitting) | | **Skin changes** | Dry, loose, wrinkled | Dermatitis, hyperpigmentation, peeling | | **Hair** | Sparse, thin, brittle | Reddish-brown, easy plucking | | **Appearance** | Wizened, old-looking | Moon face, pot belly | | **Prevalence** | Most common globally | Less common; more in protein deficiency | **High-Yield:** Marasmus = **wasting without edema**; Kwashiorkor = **edema with less wasting**. The wizened appearance and loss of subcutaneous fat are hallmarks of marasmus. ## Pathophysiology 1. **Caloric deficiency** → breakdown of muscle and adipose tissue 2. **Metabolic adaptation** → reduced metabolic rate, sparing of vital organs 3. **Absence of edema** → preserved plasma proteins relative to total body depletion 4. **Immunosuppression** → susceptibility to infections **Clinical Pearl:** In resource-limited settings, marasmus is far more prevalent than kwashiorkor because total caloric deficiency (affecting both carbohydrates and proteins) is more common than selective protein deficiency. **Warning:** Do not confuse marasmus with kwashiorkor based on edema alone. Marasmus can present with severe dehydration-related signs but NO pitting edema.