📘 Section 105.4 · Cysteine and Cystine Disorders

Nelson Textbook of Pediatrics 22nd Ed | Sulfite oxidase deficiency, molybdenum cofactor deficiency (MOCS1, MOCS2, GPHN), cystinuria (SLC3A1, SLC7A9), cystinosis (CTNS). Clinical features: seizures, lens dislocation, Fanconi syndrome, nephrolithiasis, cPMP therapy.

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📋 30 Clinical Scenarios — Cysteine/Cystine, Sulfite Oxidase, Moco Deficiency (FCPS level)

📇 High‑Yield Review Cards (Cysteine/Sulfite/Moco/Cystinuria/Cystinosis)

🩺 Symptom‑Based Approach: Suspected Cysteine/Cystine Disorders

Select a presentation for diagnostic clues.

📋 Stepwise Management of Sulfite Oxidase & Moco Deficiencies, Cystinuria, Cystinosis

    ⚡ Reflex Prompts — Clinical Decisions in Cysteine Disorders

    📖 Summary: Cysteine & Cystine — Nelson 22nd Ed