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Related Experiment Videos

Variegate porphyria.

P Mustajoki

    Annals of Internal Medicine
    |August 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Variegate porphyria often presents as an acute attack, mimicking acute intermittent porphyria. Fecal porphyrin analysis is crucial for accurate diagnosis, especially when skin symptoms are absent.

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    Area of Science:

    • Biochemistry
    • Genetics
    • Internal Medicine

    Background:

    • Variegate porphyria (VP) symptoms can mimic acute intermittent porphyria (AIP), leading to misdiagnosis.
    • Skin fragility in VP is often mild and present in only half of patients, complicating diagnosis.
    • Acute porphyric attacks are the most common presentation in temperate climates.

    Purpose of the Study:

    • To highlight the diagnostic challenges in differentiating VP from AIP.
    • To emphasize the importance of fecal porphyrin analysis for VP diagnosis.
    • To suggest that VP may be more prevalent than previously thought.

    Main Methods:

    • Analysis of clinical presentation, including skin symptoms and acute attacks.
    • Assessment of urinary porphobilinogen (PBG) and delta-aminolevulinic acid (ALA) excretion.

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  • Measurement of fecal porphyrin excretion, specifically protoporphyrin.

    • Main Results:

    • Acute attacks in VP are clinically indistinguishable from AIP.
    • Fecal porphyrin levels are significantly elevated in VP, predominantly protoporphyrin.
    • Urinary PBG and ALA increase only during acute attacks in VP.

    Conclusions:

    • Accurate diagnosis of VP requires fecal analysis, as urinary findings can be misleading.
    • Patients with acute porphyria symptoms, even without skin manifestations, need fecal porphyrin testing.
    • Increased awareness and diagnostic testing may reveal a higher prevalence of VP.