Table 4.

Recommendations for monitoring patients with EPP

ConditionRecommendationPeriodicity
Gallstones or cholestasis Erythrocyte protoporphyrins Every year 
Liver function tests (aspartate aminotransferase, alanine aminotransferase, bilirubin) Every year 
Abdominal imaging (ultrasound or computed tomography) Every year; consider shorter intervals for patients with erythrocyte protoporphyrins >2000 μg/dL 
Low bone mineral density Serum vitamin D Every year 
Alkaline phosphatase Every year 
Bone mineral density (dual-energy X-ray absorptiometry scan) Baseline, then every year if treating osteopenia or osteoporosis; repeat every 3–5 y if normal scans 
Iron deficiency anemia Complete blood count Every year 
Ferritin and transferrin saturation Every year 
Skin hyperpigmentation or melanocytic nevi Full body skin exam Every 6 mo if on afamelanotide 
ConditionRecommendationPeriodicity
Gallstones or cholestasis Erythrocyte protoporphyrins Every year 
Liver function tests (aspartate aminotransferase, alanine aminotransferase, bilirubin) Every year 
Abdominal imaging (ultrasound or computed tomography) Every year; consider shorter intervals for patients with erythrocyte protoporphyrins >2000 μg/dL 
Low bone mineral density Serum vitamin D Every year 
Alkaline phosphatase Every year 
Bone mineral density (dual-energy X-ray absorptiometry scan) Baseline, then every year if treating osteopenia or osteoporosis; repeat every 3–5 y if normal scans 
Iron deficiency anemia Complete blood count Every year 
Ferritin and transferrin saturation Every year 
Skin hyperpigmentation or melanocytic nevi Full body skin exam Every 6 mo if on afamelanotide 
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