Dermatology Differential Diagnosis by Morphology

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1. Not associated with systemic disease
   1. Primary
      • Traumatic
      • Cellulitis
      • Pressure
      • Neurotic excoriation, factitial
   2. Secondary to predisposing lesion
      • Burns
      • Radio dermatitis
      • Neoplasm
2. Associated with systemic disease
   1. Vascular disease
      • Artierial
        1. Atherosclerosis
        2. Hypertensive ischemic
        3. Anterior tibial syndrome (occlusion anterior tibial artery)
        4. Pernio
      • Venous
        1. Stasis
        2. Thrombophlebitis
   2. Pyoderma gangrenosum - More examples: #2.
   3. Diabetes - also vascular

1. Denudation of a vesiculo-bullous or pustular disorder.
2. Excoriations - see excoriations.
3. Impetigo
4. Candidiasis
   • intertriginous
   • balanitis
   • vulvitis
   • erosio interdigitalis blastomycetica
5. Toxic epidermal necrolysis
6. Staphylococcal scalded skin syndrome
7. Acrodermatitis enteropathica
8. Glucagonoma syndrome

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