Dermatology Book

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MaculeAka: Patch

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  1. Description
    1. Non-palpable flat lesion with skin color change
    2. Patches are macule that are >3-4 cm in diameter
  2. Signs
    1. Macules are flat and not palpable
      1. If raised, then consider Papule or Plaque
      2. Methods to determine if lesion raised
        1. Side lighting
        2. Careful palpation
    2. Color
      1. Hypopigmentation (e.g. Vitiligo)
      2. Hyperpigmentation
        1. Melanin (e.g. Cafe-Au-Lait Spots)
        2. Hemosiderin (e.g. Mongolian Spots)
      3. Vascular changes (e.g. Capillary Hemangioma)
  3. Examples
    1. Drug Eruption
    2. Systemic Lupus Erythematosus or Discoid Lupus
    3. Pityriasis Rosea
    4. Seborrheic Dermatitis
    5. Secondary Syphilis
    6. Vitiligo

Macule (C0332573)

ConceptsSign or Symptom (T184)
EnglishMacula, Maculae, Macule
Spanishmácula, macula
CreditsDerived from the NIH UMLS (Unified Medical Language System)


Transdermal Patch (C0991556)

Definition (NCI)A bandage-like patch that releases medicine into the body through the skin. The medicine enters the blood slowly and steadily.
ConceptsBiomedical or Dental Material (T122) , Drug Delivery Device (T203)
EnglishPatch, Skin Patch, Transdermal Patch, Transepidermal Patch
Spanishparche transdérmico, parche transdermico
CreditsDerived from the NIH UMLS (Unified Medical Language System)



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