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Related Concept Videos

Changes in Skin Color: Clinical Perspectives01:14

Changes in Skin Color: Clinical Perspectives

The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
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Related Experiment Video

Updated: Jun 26, 2026

Intraoperative Detection of Subtle Endometriosis: A Novel Paradigm for Detection and Treatment of Pelvic Pain Associated with the Loss of Peritoneal Integrity
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Blue (or purple) toe syndrome.

Jan V Hirschmann1, Gregory J Raugi

  • 1Medical Service, Puget Sound Veteran's Affairs Medical Center, University of Washington, Seattle, Washington, USA.

Journal of the American Academy of Dermatology
|December 24, 2008
PubMed
Summary

Blue toe syndrome presents as toe discoloration without trauma or generalized cyanosis. Diagnosis relies on medical history, physical exam, and lab tests to identify underlying causes, which can be life-threatening.

Area of Science:

  • Vascular Medicine
  • Dermatology
  • Internal Medicine

Background:

  • Blue (or purple) toe syndrome is characterized by toe discoloration without trauma, cold injury, or generalized cyanosis.
  • It stems from decreased arterial flow, impaired venous outflow, or abnormal circulating blood.
  • The discoloration can be blanching or nonblanching, depending on the underlying cause.

Purpose of the Study:

  • To define blue (or purple) toe syndrome.
  • To categorize the various causes of this condition.
  • To highlight key historical, clinical, and laboratory findings for accurate diagnosis.

Main Methods:

  • Review of medical literature and clinical case studies.
  • Analysis of diagnostic criteria for blue toe syndrome.

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  • Correlation of clinical presentation with underlying etiologies.

    • Main Results:

    • Blue toe syndrome encompasses diverse etiologies including arterial insufficiency, venous stasis, and hematologic disorders.
    • Accurate diagnosis is crucial as many causes pose significant risks to life and limb.
    • Patient history, physical examination findings, and laboratory tests are paramount for differential diagnosis.

    Conclusions:

    • Effective management of blue toe syndrome necessitates a thorough diagnostic approach.
    • Distinguishing between blanching and nonblanching cyanosis aids in etiological classification.
    • A comprehensive evaluation integrating clinical and laboratory data is essential for optimal patient outcomes.