A 18-month-old girl from a low-income household in Delhi presents with her mother's complaint of "the child looks like skin and bones." On examination, weight is 7.5 kg (expected 11–12 kg), height 74 cm (expected 80–82 cm), and the child appears severely wasted with prominent ribs, vertebral spines, and loss of subcutaneous fat. There is NO edema, NO hepatomegaly, and NO hair changes. Serum albumin is 2.8 g/dL, and total lymphocyte count is 600/μL. The mother reports a history of inadequate food intake for the past 8–10 months due to family poverty. What is the most likely diagnosis?

Explanation

## Clinical Diagnosis: Marasmus ### Defining Features of Marasmus **Key Point:** Marasmus is **chronic, total protein-energy malnutrition** characterized by severe loss of BOTH muscle and fat, with **NO edema**, **NO hepatomegaly**, and **NO hair changes**. The child appears as "skin and bones." ### Clinical Presentation Analysis This child exhibits the classic presentation of marasmus: 1. **Severe Wasting** — Weight-for-age and height-for-age both significantly below expected (wasting + stunting), indicating chronic malnutrition 2. **Loss of Subcutaneous Fat and Muscle** — Prominent ribs, vertebral spines, and generalized wasting visible on inspection 3. **Absence of Edema** — No fluid retention; the child is truly depleted of body mass 4. **No Hepatomegaly** — Unlike kwashiorkor, there is no fatty infiltration of the liver 5. **No Hair Changes** — Absence of flag sign, depigmentation, or easy hair pluckability 6. **Chronic History** — 8–10 months of inadequate food intake (both protein AND calories) 7. **Biochemical Profile** — Albumin is low (2.8 g/dL) but higher than in kwashiorkor; severe lymphopenia reflects prolonged immune compromise ### Comparison: Marasmus vs. Kwashiorkor | Feature | Marasmus | Kwashiorkor | |---------|----------|-------------| | **Protein Status** | Deficient (both protein and calories) | Deficient (protein > calories) | | **Caloric Status** | Deficient | Relatively preserved | | **Onset** | Chronic (months–years) | Acute (weeks–months) | | **Appearance** | "Skin and bones" | Puffy, edematous | | **Edema** | Absent | Present | | **Subcutaneous Fat** | Severely depleted | Preserved | | **Muscle Mass** | Severely wasted | Masked by edema | | **Hepatomegaly** | Rare | Common | | **Hair Changes** | Minimal or absent | Flag sign, depigmentation | | **Serum Albumin** | Low (2.5–3.0 g/dL) | Very low (<2.5 g/dL) | | **Prognosis** | Better if treated early | Worse; high mortality if untreated | **High-Yield:** **No edema + No hepatomegaly + Severe wasting of fat AND muscle = Marasmus** ### Pathophysiology of Marasmus 1. **Chronic Caloric Deficit** → Mobilization of glycogen, then fat and muscle for energy 2. **Preserved Albumin Synthesis** → Albumin levels are maintained relatively better than in kwashiorkor (the liver is not fatty) 3. **Adaptive Metabolic Changes** → Reduced metabolic rate, decreased thermogenesis, and conservation of vital organs at expense of peripheral tissues 4. **Immune Dysfunction** → Severe lymphopenia and impaired cell-mediated immunity due to prolonged malnutrition 5. **Growth Retardation** → Both linear (height) and ponderal (weight) growth are affected ### Clinical Pearl **Clinical Pearl:** Marasmus is often called "chronic PEM" and is more common in developing countries where absolute food shortage is the primary problem. The child's appearance is often described as an "old man's face on a child's body" due to loss of subcutaneous fat and muscle. ### Key Distinguishing Point **Warning:** Do NOT confuse the presence of low albumin (2.8 g/dL) with kwashiorkor. In marasmus, albumin IS low, but it is NOT as low as in kwashiorkor (<2.5 g/dL). The **absence of edema and hepatomegaly** is the critical differentiator. ### Management Approach 1. **Gradual Refeeding** — Start with small, frequent feeds; risk of refeeding syndrome is lower than in kwashiorkor but still present 2. **Caloric and Protein Rehabilitation** — Increase both calories and protein progressively 3. **Micronutrient Supplementation** — Vitamins A, D, B complex; zinc; iron; copper 4. **Infection Screening** — Tuberculosis, parasites, chronic diarrhea must be ruled out 5. **Psychosocial Support** — Address socioeconomic factors and maternal education 6. **Monitor Growth** — Weight gain should be gradual (10–20 g/kg/day); linear growth recovery is slower [cite:Park 26e Ch 10; Ghai Essential Pediatrics 9e Ch 5]