Consultant360A 55-Year-Old Man With Sore Hands, Ruddy Complexion

🧩 Diagnostic Reasoning Exercise / Teaching Case
A 55-year-old financial planner of Irish American descent presented with six months of bilateral MCP and wrist discomfort, ruddy complexion, AST 85 U/L, hemoglobin 17.0 g/dL, and transferrin saturation 57%. Readers are asked to identify which management statement does not apply to the underlying diagnosis.

Diagnostic Considerations

• Transferrin saturation above 45% in men carries approximately 94% sensitivity for the iron overload disorder in question; ferritin above 300 µg/mL adds 88% sensitivity overall.
• Carrier rates reach 1 in 7 in Northern European populations, with variable penetrance complicating clinical recognition.
• Hepatic complications drive morbidity and mortality in confirmed cases, warranting biannual hepatocellular carcinoma surveillance.
• The case prompts readers to distinguish iron overload management from unrelated hematologic diagnoses that share elevated hemoglobin findings.

Practice Pearls

• Recognize the triad of hand arthritis, elevated transferrin saturation, and Northern European ancestry as a screening trigger.
• Interpret transferrin saturation above 45% and ferritin above 300 µg/mL as indications for confirmatory genetic testing.
• Monitor confirmed cases with serial ferritin and surveillance ultrasound.
• Consider first-degree family screening once an index case is confirmed.

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