Differential Diagnosis in Dermatopathology

Epidermolytic hyperkeratosis vs. Plane wart

…ous nodules (lymphadenosis benigna cutis), and acral patches and plaques that in time become atrophic (acrodermatitis chronica atrophicans). It may express itself in other organs as well, with cardiac, neurological, and arthritic symptoms and signs….

Differential Diagnosis in Dermatopathology

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Histologic Diagnosis of Inflammatory Skin Diseases

Incontinentia pigmenti

…Laboratory confirmation Genetic mapping for mutations in the Xp I I.21 or the Xq28 locus. Cause and mechanism This hereditary systemic disease is caused by an X-linked genetic defect in loci Xp I I.21 or Xq28, which is dominant in females and usuall…

Differential Diagnosis in Dermatopathology

Nodular vasculitis vs. Subcutaneous polyarteritis nodosa

…ous nodules (lymphadenosis benigna cutis), and acral patches and plaques that in time become atrophic (acrodermatitis chronica atrophicans). It may express itself in other organs as well, with cardiac, neurological, and arthritic symptoms and signs….

Dermatology Practical & Conceptual

Yellow color upon dermatoscopy does not exclude melanoma!

…k, bright red, purple or blue. Instead, yellow color has been linked to keratin or lipids, and accordingly, it is commonly seen in keratinizing tumors including seborrheic keratosis and squamous cell carcinoma or in tumors with sebaceous differentiat…

Histologic Diagnosis of Inflammatory Skin Diseases

Lupus erythematosus

…nyms Lupus erythematodes Presentation stereotypical Age and sex Young adult women especially, but sometimes neonates and older persons of both sexes. Distribution of lesions Often localized to sun-exposed sites such as the face, chest, and arms, but…

Histologic Diagnosis of Inflammatory Skin Diseases

Pemphigus foliaceus

Pemphigus foliaceus Presentation stereotypical Age and sex Adults usually and of both sexes Distribution of lesions Localized to photodistribution in pemphigus erythematosus; widespread in pemphigus foliaceus Individual lesions Macules, patches, fla…