📘 Primary Cystathioninemia (Cystathioninuria)

Nelson Textbook of Pediatrics 22nd Ed — Section 105.3 (Methionine). Cystathionine gamma-lyase deficiency (CTH gene). Massive cystathioninuria, usually benign, vitamin B6 responsive. Secondary causes: B6/B12 deficiency, liver disease, galactosemia, neuroblastoma.

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📋 30 Clinical Scenarios — Primary Cystathioninemia & Related (FCPS level)

📇 High‑Yield Review Cards (Cystathioninemia)

🩺 Symptom‑Based Approach: Suspected Cystathioninuria

Select a presentation for diagnostic clues.

📋 Evaluation & Management of Cystathioninemia (Nelson 105.3)

    ⚡ Reflex Prompts — Clinical Decisions in Cystathioninuria

    📖 Summary: Primary Cystathioninemia — Nelson 22nd Ed